Key Muscle Groups for a Harmonious Physique in Bodybuilding**

When you venture into the world of bodybuilding, it’s natural to focus on developing big, strong muscles, but the real challenge and goal lie in building a harmonious and balanced physique. Having a symmetrical figure will not only help you stand out in competitions but also help you maintain a healthy and functional body.

Here are the muscle groups you need to work on to achieve that desired shape!

1.  Pecs: The foundation of a powerful upper body – The chest is the focal point of the upper body. Well-developed pecs give you that voluminous, athletic look that stands out in any fitted shirt. Spend time on exercises like bench presses and flyes to achieve a defined, broad chest.

2.  Back: The key to the famous “V” shape – The back is one of the largest muscle groups and often one of the most neglected. Developing the lats will help you achieve the coveted “V” shape, adding width and depth to your physique. Lat pulldowns and barbell or dumbbell rows are your allies here. And don’t forget the traps—well-developed traps add visual bulk and strength!

3.  Shoulders: The touch of width— Strong shoulders not only increase your appearance of power but also harmoniously connect the torso with the arms. Work the deltoids in all their parts (anterior, lateral, and posterior) to avoid imbalances. Presses and lateral raises are key.

4.  Arms: The perfect combo of biceps and triceps – Well-developed arms are always admired. But to have fully developed arms, you need to focus on both the biceps and triceps. Exercises like barbell or dumbbell curls for biceps and dips or triceps extensions will help you maintain balance between both muscles, achieving an impressive aesthetic.

5.  Abs: Definition at the center of the body – A sculpted abdomen is the hallmark of a well-worked physique. It’s not just about aesthetics; strong abs provide stability in other heavy exercises. Incorporate variety: from crunches to planks, to achieve a strong, well-defined core.

6.  Legs: The foundation of any great physique – Voluminous quadriceps are fundamental if you want a complete and proportioned physique. Well-developed hamstrings balance the volume of your legs and protect you from injuries. Squats, leg presses, and deadlifts are essential to making your legs as impressive as your upper body.

7.  Glutes: Don’t underestimate them – In bodybuilding, well-developed glutes are crucial for a strong and balanced physique. They help improve your posture and shape the lower body. Exercises like hip thrusts and lunges are key for developing this area.

8.  Calves: Don’t neglect the details — Calves are one of the most challenging muscles to develop, but well-developed calves complete a balanced figure. Include calf raises in your leg workouts to ensure this muscle group doesn’t fall behind.

Why is balance important? – It’s not just about having big muscles; what will make you stand out is a proportioned physique. A harmonious development will help you avoid injuries, improve your performance, and, most importantly, achieve a visually pleasing body. Working on each muscle group in a balanced way will not only make you a bodybuilder but a complete athlete.

Stay motivated to keep improving! – Bodybuilding is an art, and you are the sculptor of your own body. Don’t just focus on the muscles that are more visible or easier to work on. The key to success lies in balance and consistency. With every workout, you are one step closer to your best version. Remember: true strength lies in balance! | Follow us on X | Write us at WhatsApp | chulucanasgym@gmail.com 

You can control this way if your body improves or not

By ChulucanasGym

Everyone who goes to the gym or does any type of training  is expectant about his or her progress. Have I overcome something I couldn’t overcome before, am I on the same spot when I started, or, in the worst scenario, am not I closer where I started neither?

The problem about measuring our progress is how much objectivity we put to our appreciation. In that sense, the first mistake we use to commit is trusting in the bare-eye, in what we see on the mirror, and almost never the diagnosis we get is reliable. Then, the prognosis we set uses to be wrong.

Is there any objective form to control our progress? Yes, there is. The anthropometrics is the discipline that helps us to have information adjusted to the reality on we can do our analysis and set up our strategies for improving or correcting our physical achievement. This information must be key for your and your trainer at the time to define if it’s necessary to adjust the training routine, the diet, the lifestyle in general, or everything.

Coming up next, we introduce you those key indicators you can control from your home, inclusive, and those will give you that objective vision about what is happening to your body. Look at the data you get – they can’t be taken isolated but grouped. So, the conclusions you arrive and the action plans you take will be more accurate than acting by simple supposition or guessing.

Height

This measure is basic because it serves to calculate other body measures such as absolutes, indexes, and percentages, we will talk about later. You can use a stadiometer, that is the specialized tool in measuring your height, although you can also take the job to paste a measuring tape on the wall or to paint a number scale in centimeters (or feet and inches in the U.S.) setting the ground as the point zero.

Next, take off your shoes, raise naturally, stick your body to the stadiometer or the wall column. Over 20 years old, the height is unvariable for both sexes, at least until the senescence when it can reduce because you will lose bone and muscular tissue.

Body Weight (BH)

It’s a first progress indicator, but alone is not enough because it only will say us if we have increased or have decreased respect to the last measuring. However, it offers us first clues.

The manner of taking it is as easy as put you up on the weighing machine and waiting for the reading in kilos and grams (pounds and ounces in the U.S.). What you have to be careful for sure is  how you take your weight: you ever have to take your shoes off and put on the device; don’t worry about your clothes (if sportswear) because the adding increase is irrelevant, unless you’re a professional or contesting athlete or bodybuilder, and it will be actually necessary you take off almost all your clothes or get naked for having the correct number. Of course, it will depend on how much privacy the place has and how much you trust in the one who could be with you.

The bathroom weighing machines use not to be much accurate as the clinic weighing machines that might be at every good gymnasium. Some electronic devices are only reliable as much as the manufacturer warns it so; then, read the instructions carefully before considering it as reliable and compare many readings taken with different devices to know what is the most accurate. In the same way, we suggest you have a monthly or biweekly record of your weight. Some trainers probably will demand you to have a weekly control if you’re training for a competition. Obbey them.

Absolute Body Measures (ABM)

We call them absolute body measures or ABM because they give us advance or slowing down indicators what only apply to our body as much as parts of it have got wider or have got thinner than a previous control. For that, what interests us is to have countour or perimeter measures expressed in centimeters (or inches in the U.S.), those put in a table give us a mathematical idea of your body volume. Who are dedicated to be models or bodybuilders or athletes know perfectly what we mean. However, a proffessional physical trainer will have here compplementary information to the BW  through he or she can evaluate the effectiveness of the training plan, the diet, or the lifestyle.

The best manner to take these measures  is by using a measuring tape that is put over the skin, not stretching it or releasing it too much, but letting it adjusts naturally to the shape of your body. The precission of the measure gets when the tape makes direct contact with your skin. If there are clothes between them, the excess must be depreciated or definetly avoided. Another trick, if you want more precission, is taking the measure before having meals or starting your training session. And if you still want more precission, take three measures of the same zone and then go to have the average for eliminating the excess or default error.

The measures are taken on specific areas of your body. Remember we need to know the contours, in other words you have to take the measuring tape and round each part of the body, going around it. We are not interested on lineal measures (as taken in dressing), we want to have an idea about volume. The places where those measures are gotten:

• Shoulders: Take as reference the part where it is seen more prominent and put there the start line of the tape. Then, pass it under your two clavicles until arriving to the most prominent part of your another shoulder. From here, make the tape to run over the upper part of your backuntil meeting the pointwhere the tape begins. For you to have an idea if you have taken the measure correctly, if you’re a male and you’re 170 centimeters or 5 feet 7 inches height, your shoulders perimeter should be between 118 to 120 centimeters or 46.5 to 47.1 inches. However, this measure is relative according to your age, body shape, and sport goalds.
• Chest: Whether you are a male or a female, take as a reference the part where it is more prominent (probably the nipples in both cases) and go the tape around you including your scapulas. For the women, taking this measure will be easy because it belongs to the same like the bust contour, very required in dressing or beauty contests. If you’re a 170-cm or 5’7-feet male height, your chest contour could be between 106 and 108 centimeters, or 41.2 and 42.5 inches, but we remind you the measures are relative, as we clarified you on the previous point.
• Arms and forearms: The biceps and triceps allow your to know how you are in arms, so you will have to round them at the same time with the measuring tape and take the reading. If you’re a male 170 centimeters or 5’7 feet height, it is possible your arms grow until 38 or 39 centimeters, or 15 or 15.4 inchescontour. In forearms case, take as a reference its most prominent part and put you the tape around, although this measure is almost never used.
• Waist:    In the males, it’s taken as a reference a point 3 centimeters or 1.2 inches below your belly button, and in the females, the zone where it becomes strechest, 2 centimeters or 0.8 inches above the belly button in general. Then, you take the tape around including the lower back in the case of males and the medium back in the case of women. The World Health Organization recommends the males should not be more than 95 centimeters or 37.4 inches waist contour, and the females no more than 65 centimeters or 25.6 inches, although not much because of a beauty criterion but preventing many conditions caused by the overweight and the obesity.
• Belly: In the case of women it’s the same than the taken for waist in men. Basically, it looks to know how much flat your belly is, in mathematical terms, obviously.
• Hips: In male as well as female, it’s taken as a reference the most prominent part of your gluteus, rounding both sides where the pelvic bone is more prominent, passing over your pubis. If you’re a male (and adding the squads, your genetics helps you too), it is possible you reach 102 centimeters or 40.2 inches contour if you’re 170 centimeters or 5’7 feet height.
• Thighs: It’s the section of your leg that begins in your pelvis and ends in your knee. Look for its widest part and round it with the measuring tape. Look! You have to take just one thigh per measuring, never both at the same time. If you’re a male 170 centimeters or 5’7 feet height, your thigh can be between 59 and 60 centimeters or 23.2 and 23.6 inches at least, although it’s going to depend on your kind of training. What is clear, indeed, is that for every 3 centimeters or 1.2 inches of thigh you get, your arm can not be more than 2 centimeters or 0.8 inches.
• Calf: It’s the part of your leg between your knee and your ankle. Look for its more prominent part and round it here with the measuring tape. As equal as the thigh, both calves never must measured at the same time but one at once. If you’re a male 170 centimeters or 5’7 feet height, your calf can be 37 to 38 centimeters or 14.6 to 15 inches at least. Yes, at least.

Indexes And Body Percentages

If you think it’s too many Maths for today, we have not finished yet. There are more specialized indicators those allow you to measure your progress, especially if you are in a professional or competition training environment.

• Body Mass Index (BMI): Basically, it gives us a more accurate idea if you are your ideal weight, or if you are overweight or in obesity. It is calculated by dividing your weight in kilos by your height’s square. Let’s suppose you’re a male 170 centimeters (1.7 meters or 5’7 feet) and you’re 70 kilos (154.3 pounds), your BMI will be 24.2 – it’s inside the healthy.  If it would exceed beyond 30, we could talk  about obesity.
• Body Fat Percentage (BFP): It’s a more specialized measure that, as its name says, looks for knowing if there is a healthy balance between the body fat you need for your vital functions and the fat you store to do your elective functions –we mean- as training. Here Maths are not enough but we need to use special procedures and devices for having us a reading. It is obtained by multiplying the quantity of your body fat by the quantity of your body mass and all that divided by 100. Women will ever have a BFP greater than men because some fat is reserved for reproductive functions. About percentages, it is considered that athletes go from 10% to 15% depending on the physical activity they do. A professional trainer will educate you about how to control your BFP for optimizing better your training, although will combine it with diet and improvement in your lifestyle. In fact, it is probable this catch more attention.

So, if you only trusted in your mirror, your weighing machine, or your measuring tape, you see we have to combine all this and much more in the end if we want to measure progress. And, by the way, it’s not a bad idea you feed all your data on an electronic  spreadsheet that allow you to view graphically if you improve, you keep, or you need to work harder. Yes, it’s a lot of work but you deserve it well. It also will give you more conscience about you, especially if you add some psychological advisory to see if there is any motivation problem, or something like this.

Like everytime, we will be pleased to know your questions here on the comments, or on our Twitter account, or by writing us at chulucanasgym@gmail.com

The models featured on this post are Pedro Changanaquí, Fran Checa, Alfredo Rivera, and Anderson Sandoya

It’s time you put in casting mode

At least in Peru, the Covid-19 infection is going to change muchly the culture about healthy lifestyles, and possibly to be the better. One of the measures the government has taken is body mass index (BMI) people equal or upper 40 may not work in person when the economy to reactivate because they are one of the most vulnerable human groups to the contagion.

The medical reason is simple: the virus leaves the lungsockets useless, the little bags  we have where oxygen feeds the blood allowing the functions of our body to work normally. When that vital gas scarces –a condition known hypoxia—our cells begin to weaken and even die, then they unchain oother health conditions which can shorten our life.

The diabetes and the cardio-vascular diseases also have to do much with obesity. Initially, the Peruvian government fit to the suggestion of World Health Organization about BMI people equal or upper 30, at the moment, were not abled to presential work, but a popular claim moved the mark up to 10 points.

Could your country or your boss take the same decisions? If we think it on the perspective of laboral risk, it’s a chance. Claiming could be a choice but i’ts the easiest choice. The alternative could be you don’t wait for the idea to turn a rule and take control of your own health. But many guys begin enthusiastic in the beginning and lose the motivation step by step.

Here is when our brain has to work to re-program first. Yes, we can. And although we are not endorsing you to take an image as a mirror, the current sanitarian situation does demand us to look for very inspiring references, and after much exploring, we find with the expectant attitude the models have. Yes, the guys you see looking like on the magazines, the posters, or the TV. They are ever ready for the next work, so all their effort is focused on the next casting.

Perhaps this same attitude is what you should adoptbut not falling into paranoiaor increasing your anxiety neither, so here we have a full recipe possibly useful for you very much. Easier, impossible.

Keep your body in shape

When a model has a casting, the first they are going to see is the physique, and that only is gotten with physical exercise, healthy feeding, enough and fixing rest. Remember you have to dedicate at least half-an-hour to work-out your physique, your feeding must cover all your energy need in the right balance, and your whole resting time really recharges in terms of alert and mood.

Then, you have to organize your lifefor accomplish each one of your activities and you must set real, verifiable goalsthose allow to control if you triumph or happens the whole opposite. Doubts? Contact a physical trainer now.

Focus your mind

When a model goes casting, knows pretty well the body is not enough. What the directors are going to evaluate is also how much concentration the model is going to performin the activity he or she is required for. If your body is here but your mind is away, things are not going to work well and that’s easy to notice, especially in crisis time.

Address all your attention to the actual moment, make aware of everything you do or say (even not mentioning any word), follow up the sequence of any activity since its beginning until its end, and pass to the next one when the last one was fulfilled, breathe deeply and think of yourself to ease projecting outside. The meditation is an excellent exercise and we know somebody who can help you.

Perfectionate your talent

We already have a good-shape body, we already have a focused mind. But, what do you know to do? It’s probable what you know to do, other many people can do the same way. Then, your personal task must be improving it to highlight. In that sense, more than compete against the other people, you should compete against yourself, against you used to be. As they say, making yourself a better version of yourself everytime.

And what about if they don’t choose you? This is the major probability a model has clear, then the first he or she learns is overcoming the mistake and reinvent for facing the next challenge, never giving up, following to fight until get it – to be resilient.

Using the social media to show the wworld how much preparation you have got in what you do the best? Yes, of course! Now than ever before, it’s an excellent decision but do it intelligently, strategically, not trying to be like anyone else but differentiating to be better than anyone else. If you need advise, we have somebody who can help you. And remember never to lose the faith in you.

As you will see, to be in casting mode is not only a mind state, the body and the spirit also have to do. It’s not complicated as much as you don’t see it complicated. It neither is a super piece of cake but it demans certain effort. What is actually clear – you can’t lose more time and you have to start right now, so when they call at you, the probability they say “begin to work today” to be very high.

Of course, we will be pleased to know your achievements or doubts on our Twitter account or our e-mail address: chulucanasgym@gmail.com

Thanks Carlos Maceda ffor giving us his photos to picturing this entry.

Training Smart: How to Maximize Your Gym Performance Without Sacrificing Progress

For a passionate bodybuilder, the motivation to train every day is immense, but training efficiently is crucial to avoid plateaus or injuries. Understanding how to structure workouts, especially if you're considering working the same muscle group on consecutive days, is key to optimizing results and staying in top shape.

 

Balancing Upper and Lower Body Training on Alternate Days

Splitting workouts into upper and lower body days is an effective approach that allows you to train with high frequency without overloading a specific muscle group. This method maximizes recovery and ensures balanced development.

 

Key Benefits:

• Targeted recovery: Alternating days gives muscles time to recover, maintaining workout quality.
• Symmetrical development: Regularly working both upper and lower body promotes a proportionate physique.
• Reduced risk of overload: The central nervous system (CNS) also gets recovery time, which optimizes performance and reduces fatigue risk.

 

What Happens if You Train the Same Area on Consecutive Days?

Training the same muscle group on back-to-back days comes with risks and limitations:

 

• Overtraining risk: Consecutive training without rest can cause accumulated fatigue, impacting performance and increasing injury risk.
• CNS fatigue: Even if muscles can handle the load, the CNS may be overtaxed, leading to a decrease in overall capacity.
• Adaptation and plateauing: Insufficient recovery prevents muscles from adapting to the stimulus, slowing progress in strength and hypertrophy.

 

When Training the Same Area Can Be Effective

There are scenarios where working the same muscle group two days in a row can be beneficial, provided it's strategically planned:

 

Low-intensity sessions: A day focused on technique or activation followed by a higher-intensity workout can prepare muscles for greater effort.

High-frequency programs: Some advanced programs, such as powerlifting routines, use an approach that allows working the same area with different intensity levels on consecutive days.

 

How to Train Smart

Vary the stimulus: Alternating between heavy and light days allows you to train the same muscles without compromising recovery.

Adequate recovery: Good sleep, proper nutrition, and active recovery techniques like stretching and massages are essential for staying in top shape.

Listen to your body: Recognizing signs of extreme fatigue or pain is essential to avoid injury and adjust your program as needed.

 

Conclusion

Y            our motivation to hit the gym daily is your greatest asset, but turning it into progress requires strategy. Training smart and allowing time for recovery will take you further, letting you enjoy the journey without risking your health. Follow us on X | Talk to us | chulucanasgym@gmail.com

  

If it pains you, work out again

By ChulucanasGym

Art by Franklin Juárez – Exclusive for ChulucanasGym

Is anything worse for a guy who has dedicated a good part of his life to intense physical activity? Yes, there is. And we’re not talking about not to do it often or anymore, but the consequence after a long or short period without activity – pains in muscles and joints. Depending on the type of training that you have done, the annoyance uses to appear besides the neck, the shoulders, the arms, almost all the back (especially the lower part), the upper side of the gluteus (and its lower zone, eventually), the thighs, the knees, and the calves (look at the figures).

It’s true that the massages help, but if is the pain recurrent? Many followers told us that they have started to feel back pain particularily, and all focused in the lower part. That brought our attention, so in the process to research  the background of physical activity, we found in all cases that you did weights, aerobics, dance, and even football.

Every person who asked us don’t meet each other nor live in the same location, but we had the reference of the intense physical activity, so we asked what would happen if they retake it. The ones who did it experienced a gradual remission of the pain at the point to disappear.  “It pained even when I rested, but when I played football again, it was giving up,” Franklin Juárez, 32, told us in Tambogrande, Peru, who contributed us to illustrate this article too.

What is the principle behind the relief? When we do intense physical activity in a periodical term, we submit the body into a constant renovation of muscular tissue, getting it ready for conditions of stronger moves than the simple walk or shaking arms and legs. Then, we program our body to do that renovation in a continous way due to every fiber suffers from a atrophy process or modification, that makes the work we do much efficient.

If we leave to do it, that atrophy reverses slowly because the muscular tissue is elastic. And as we are not doing the voluntary process of pushing it and pulling it yet, this ends to retract, sending a switch to the brain that is interpreted as pain. Remember that the same happens when you build muscle – as the fiber breaks up, it inflamates, and it uses the same alert system for notifying that something is modifying inside there.

So our choices are keeping stopped or keeping to move. If we decide the first one, it’s probable the pains continue until the muscular atrophy reverses; if we go for the second one, the muscular atrophy continues and the brain holds the programming to have the body ready for the type of activity that we do.

And what about the overweight that is experienced when you leave to do an intense physical activity? Because of our body programs to assimilate more glucose, which we use as energy for the muscular work, as we don’t use it anymore like a kind of fuel, we trend to accumulate it as fat tissue. However, health specialists who reviewed our  report denied a relation between pain and overweight.

Nevertheless, many of you who retook the intense physical aactivity have reported that as you lost weight, the pain resumed even to disappear. The specialists explained us that sensation is rather because we have reactivated the atrophy process for that we had programmed our body, as we told up before.

In conclusion, if you did intense physical activity, you leave it suddenly for a few or a long time, and the muscles start to pain, try to work out again like before. And it’s probable that annoyance resumes. Don’t forget to ask your doctor if this seems to involve other organs of your body, and never prescript yourself. While we follow to report, share your experience on the comment box right below or on our Twitter account.

🇺🇸💪José Escobar: Precision, Power, and Presence

On Sunday, August 24th, in Lima, Peru, José Escobar—known as “El Churre”—made a triumphant return to the IFBB competition stage, and he did so with undeniable presence. His physique was not only impressive—it was a masterclass in symmetry, volume, and definition.

 

Escobar’s body tells a story: one of discipline, resilience, and strategic training. His upper and lower body are perfectly balanced, his muscle mass is dense yet refined, and his anatomical clarity is the result of meticulous preparation. This is not just a comeback—it’s a statement.

 

With a career that spans decades, José Escobar has become a reference point in Latin American bodybuilding. His return to the IFBB stage is a reminder that elite physical development is not bound by age—it’s driven by mindset, consistency, and community.

 

For you, José is a name to watch. His training philosophy, his aesthetic precision, and his ability to connect with athletes across generations make him a standout figure in the sport.

“I didn’t return to compete. I returned to affirm that I’m still here.” —José Escobar

Follow his journey, connect with his training, and witness a body that doesn’t just perform—it narrates.

  

Mask for the muscle

How good  is this accesory for you to increase flesh and stamina?

By ChulucanasGym

There is a serious disadvantage between who trains sea level and who does it upper altitude, we mean 1000 meters or 3280 feet to up. Perhaps as high as you go, the air becomes rarer and your need to consume more oxygen to do any effort increases. That is, in essence, the reason why the lowland people feel like the air lacks when they are higher.

However, a Darth Vader-style accesory  (before his face got horrible) could create the sensation of rared air at low altitude, demand your lungs for inhaling it much more, and your stamina during your workout session increases that way. 

"I used to go training before at the gym and play soccer, but since I started to study at La Unión Police Academy, I don't have such many time because my instruction and my first field assignments are my priority," one of ChulucanasGym Team founder Pedro Changanaquí, 25, tells.

Nevertheless once upon a day, he found a mask made of rubber and corespum, which he did all his cardiovascular workouts.

How does it work?
It is supposed the mask induces hypoxia - a low oxygen level, trying to simulate at low altitude the same effect that training above 2500 meters or 8202 feet had. 

If we take Chulucanas ass a basis (90 meters or 295 feet altitude), a sportsman could travel 2,5 hours until Chalaco (2200 meters or 7217 feet altitude), where he could work out.  But does it result profittable to do the trail everyday for having 1-to-3-hour training sessions? 

For the majority, this is maybe impossible, so the mask would replace straight the need to travel, reenacting at 90 meters altitude the same sensation it could have training  at 2200 meters or more (the average maximum altitude of Morropón Province is 3000 meters or  9842 feet). 

It is probable where you live the accesibility to high altitudes is so easy like this, or more difficult, or it's probable you already live in altitude and just above 2000 meters. 

Controversial results
But do you really acquire more stamina when working out  high altitude? The theory says yes because if you get more oxygen then you can endurance more, but the achievement is reported in the breathing muscle instead. 

Apparently, medical tests reveal indexes in blood and the used energy amount compared to who train low altitudes are not remarkable. In fact, one of our producers does power-&-stamina conventional mixed daily workout for 30-45 minutes in functional mode, at 60 meters or 196 feet altitude. When he had to work at 1400 meters or 4593 feet and even above 2700 meters or 8858 feet, climbbing up a montain  with 50% inclination, he did not experienced the air lack associated to disaclimatization.

In the same way, clinic tests applied  until the last year to persons using the mask neither revealed more development than breathing muscle level, but a light increase in anaerobic capability (power) indeed,  what is consistent to muscular increase that Pedro says he experienced.  However, specialists say the tests are not conclusive.

So does it mean it doesn not work? It doesn't mean so exactly, but it cannot be affirmed or denied yet that  because it is necessary to have more independent proof. Despite, if in your particular case  you notice there are benefits, and any clinic risk is discarded, it could -could!- continue working out with the mask.  Remember that what works for anyone not necessarily works to you and viceversa. Regarding Pedro, and until we do not prove the opposite, it seemed to work him.

Pedro thinks his aerobic performance might increase 25-30% compared to the time he worked out maskedless, although it is necessary to verify details as the continued and suspended training time, so his ability for muscular response before any type of effort. In other words, it will be necessary running some tests on him.

Let's remember he also did prior gym training and played sports, so muscular memory is on his favor. That means his body is able to get muscular fastly or develop stamina under the minimum workout.

However, share us your experience here, using or not the mask.