Unanswered Questions

295 questions with no upvoted or accepted answers
16
votes
1answer
1k views

Firstbeat Energy Expenditure Algorithm

I am looking for an implementation (or a document that describes the actual algorithm) for the energy expenditure/VO2/EPOC calculation from the heart rate variability. A few white papers about ...
14
votes
0answers
274 views

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 ...
10
votes
1answer
383 views

Does having abnormally low IGF-1 levels affect my ability to gain muscle mass?

I'm a 24 year old male and fairly recently found out that I have abnormally low IGF-1 levels. Mine is 90 (ng/mL) whereas the average range for my age is from 116-353 (ng/mL). I've always been pretty ...
5
votes
1answer
130 views

post stretching tightness in posterior leg muscles

I'm a 28yo female, very physically active (circus arts, martial arts, cycling, yoga), and have been for my entire life. I have partial hyperflexibility (arms, lower back, toes), and have been working ...
5
votes
0answers
72 views

Is low intensity cardio the only way to induce an increase in stroke volume?

For the guys versed in endurance training, it is now clear that low intensity steady state cardio brings one key adaptation that HIIT is not able to : an increase in the heart stroke volume (also ...
5
votes
1answer
151 views

Asymmetry in cross body shoulder stretch

I have recently noticed that I have a huge asymmetry in the cross body shoulder stretch. In particular, when stretching the left arm, I can push it to be almost parallel, to my body, while with my ...
5
votes
2answers
595 views

How long do I wait after a failed lift?

I just failed a 455lb dead lift, tried to down scale to a 405lb which I've been able to pull 5 of previously and failed at that too. How long do I rest prior to reattempting a previous max (405lb at ...
4
votes
0answers
58 views

Is lactate threshold different for different activities and/or muscle groups?

Is the adaption resulting from lactate threshold training mainly in the trained muscles, in the cardiovascular system, or both? If I improve my lactate threshold through one kind of training, ...
4
votes
0answers
39 views

Weekly distance buildup for 100k ultra

I'm going to run a 100k next July. I'm trying to plan my weekly mileage, and I'm wondering what periodisation I should do. I'm currently thinking of going for a monthly basis. Increase in week 1 &...
4
votes
2answers
90 views

Getting blister-y feet after long evening walks

Since the New Year, I've been doing 2-3 hours walk every night, while eating less. People remark that I look like I'm 30 lbs lighter now in April. I feel good but not that good ... My question is: ...
4
votes
0answers
72 views

How to keep flexibility after stretching

I stretch almost every day, and I have been doing so for a few months. My hands stop short almost a hand length from my toes. After I stretch, I can touch them. The next day, I'm back to zero. This ...
4
votes
1answer
189 views

Safe weekly amount of crosstraining for over 40 healthy adults

I am a 42 yr old male. About a month ago I finished a running program that has me now well adapted to running 3 times a week for half an hour (the famous C25K, non-commercial and freely available at ...
4
votes
4answers
332 views

How do I improve my body composition?

Hey! So over the past year I lost a bunch of weight ( I was 69kg and now I am 54 ish). But I really want to build muscle especially around my glutes and my back! As you can see I have very little ...
4
votes
2answers
184 views

Weight size when training for power (not for maximum strength, resistance or body size)

If our main goal is to increase our power (for kicking or striking a ball, for example), what size of weight would we use? Could light weights used ballistically be better than, say, big weights + ...
3
votes
0answers
38 views

What would it take to deplete glycogen stores in biceps?

So I had a question about weight lifting with biceps and how the fuel is provided. Muscles use ATP for fuel. This available atp is constantly being replenished with the glycogen in the muscle, when ...

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