Questions tagged [physiology]
The physiology tag has no usage guidance.
28 questions
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What does it mean to "activate" glutes (focus on biology, not specific exercises)?
Especially for runners, you find plenty of advice to "activate" glutes - the logic seems to be that those muscles are usually switched off for most of the time (i.e., when sitting in front ...
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Explain upper solid horiz line in Fitbit visualization of "estimated oxygen variability" graph
I am healthy and I wear a smartwatch while sleeping. Fitbit generated the following visualization of changes in estimated blood oxygen saturation variability (EOV).
I think it is only the first ...
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Proper Breathing in exercise
When we exercise, trainers and coaches frequently stress the importance of breathing and not just holding our breath in. Is it correct to say that one of the reasons they stress the importance of ...
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Understanding effect of repetitions on muscles and appearance
According to the Guardian:
"How many reps should I do? The general rule is that using a weight
that allows you to get through one to five reps builds pure strength,
five to 12 helps with muscle, ...
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Is there a way for a 300lb man to be stronger than a 500lb man?
Let's suppose that you have 2 male humans who are physically fit. One is 500lbs and the other is 300lbs.
Are there some physiological forms that would allow the 300 lb man to be stronger than the 500 ...
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Overactivity in one muscle of the agonist-antagonist pair and eventual desirability in athletes
I used to be an amateur athlete until I was 16 and I was diagnosed with brain cancer in which case I was left wheelchair-bound because of paresis in my left leg and inability to step on it. I was left ...
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210
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Need help regarding hip hinge/straight leg mobility?
Am 5 6" male 61 kg, fit and active.
I seem not able to stand straight and bend to reach my toes while keeping a straight back. I feel tight near my hamstrings and my back begins to round and I am ...
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145
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Instantly increasing flexibility by becoming angry as a result of pain
When a person experiences severe pain his body enters some sort of "survival mode" and as a result his flexibility (and strength I seem to remember) is increased.
This is demonstrated here by Charles ...
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349
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Can knee flexion exercises improve hip extension strength?
I have hyperlordosis from being seated for much of the day. I understand that I need to stretch my hip flexors and lower back and strengthen my abdominals and hamstrings/glutes to help reduce the ...
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How can I increase my vertical jump?
I am a 5"6' guy who takes active participation in football (soccer) and other activities like gym and calisthenics.The problem is due to my short stature,I need a higher jump to compensate the height ...
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Foot splay whilst running
Hi all, I’ve noticed that I have foot splay just on the right hand side whilst running. Is this a problem or just a natural quirk?
Anyone else experience this?
Thanks all.
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Losing Lean Muscle Mass (Detraining)
I have never fully understood how this exactly works. These questions pertain to the long term effects of strength training only.
Basic Physiology of Hypertrophy (what is understood)
During muscle ...
- 2,817
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441
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Rationale behind Rep Range recommendations - Strength vs Hypertrophy
It makes no sense to me why the rep range for “hypertrophy” and body builders is according to NSCA and many other sources is 3 sets and 10-12 reps.
At the most basic level cross bridges formation ...
- 2,817
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Strengthen Teeth [closed]
Recently come into ownership of a large amount of very very tough beef jerky (I got it free because no one can eat it). And was quick to realize just how wimpy my teeth were.
Just a few stripes and my ...
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Strength crossover with muscular endurance
From 'Building The Gymnastic Body'
'...our strongest student won the push-ups competition with 350 push-ups [not in a row], but the student who came second, with 300 push-ups, was a mediocre ...
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Scientific evidence for physical, not psychological, somatotying
What actual evidence is there, for or against, towards somatotypes on a physical level.
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What causes an annoying "lethargy" which increases on consecutive days of rest from running?
This question is about something I've been experiencing consistently for some fifteen years.
If I'm training consistently in running, say putting in 8 miles a day, five days a week, I experience a "...
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Climbing the stairs in digitigrade fashion - less efficient, harmful?
When going up a staircase at work, I recently realized that my heel barely ever touched the surface of the stairs. At first, I dismissed it, figuring that it just made sense to put the entire foot on ...
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What might happen if I get very low blood sugar during a run and continue running?
During a recent run, due to low blood sugar, I developed double vision. Otherwise, I felt great. Out of prudence, I quit and decided to walk home. I had eaten nothing for 14 hours before the run, so I ...
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When a muscle can flex so tight it's painful, is anything wrong?
As I train various muscle groups, I've noticed that I cannot flex a few of them the way I would biceps or quads. The flex becomes painfully tight verging on a muscle cramp before I finish the range of ...
- 1,232
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Relation of physical fitness and age
Why does the physical fitness tend to decline around the age of 30-35? It is obvious that many athletes(football, sprint etc.) tend to stagnate and 'lose' the physical fitness regarding speed, stamina ...
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Should cows milk be avoided during periods of heavy exertion?
Assuming you are not lactose intolerant, does milk have any specific negative effects on you during heavy exertion?
We're not talking about milk calories or fat related to weight loss. Does milk ...
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Mechanism and recovery of lower back pain?
I normally recover from lower back pain just going to run.
It results from studying too much and sitting - skipping gym and sport during exam weeks.
It alleviates normally after one hour running.
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Is the muscle pump after exercise due to increased cellular Na (due to reduced ATP availability)?
Cellular hypoxia leads to reduced ATP, resulting in Na/K ATPase down regulation reducing the activity of the Na/K pump.
(Since I'm limited to two hyperlinks in a question currently, this first one ...
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Is there a physiological reason why male to female transsexuals can't compete in women's weightlifting?
Let's assume the following for a moment:
a person grows up as a man, with the matching hormonal profile for his first 20 years
that person then decides to undergo hormone replacement therapy (HRT) ...
user8119
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How does Voodoo Floss work?
Voodoo Floss is a new(?) trend in CrossFit that basically involves, if I understand it correctly, wrapping a muscle group or joint very tightly in a thing called a voodoo band while stretching or ...
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When are the physical benefits of a single workout realized?
When does your body actually build muscle in response to fatigue from a workout?
For example, if you slam your arms in one work out ( say any combination of, curls, pullups, pushups, bench press, etc....
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177
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Is there a connection between general fitness/workout gain and body hair?
It might be a silly question but something that have been bugging me for many years now. Pretty much all male athletes (regardless of their discipline) look pretty much like newborn babies with the ...
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