1
vote
1answer
237 views

How is energy derived from muscle, fat and glucose at different intensities?

I have learned that during aerobic exercising the body converts different sources of energy: glucose, fat and muscle. However, different ratios are used in different situations. So what are the ...
10
votes
2answers
651 views

During muscle loss, are muscle fibers destroyed or do they just shrink?

I read somewhere that muscle fibers stay around when you lose muscle but that they only shrink (hence why people can more quickly re-add muscle after a long break than when they first put it on). Is ...
3
votes
1answer
1k views

Does high intake of protein while in catabolic mode prevent muscle loss?

This might seem like an obvious question, but I'm currently exercising a lot and losing a lot of weight (through diet), and I'm afraid that shedding this much weight that I'm putting myself in a ...
3
votes
1answer
418 views

If I build up my muscles and then don't use them for a while, then will the “build-up” regress after a while?

And if so, is regression more powerful if I build up my muscles from, say, the 90th percentile to the 99th percentile as compared to from the 30th percentile to the 50th percentile? As in, is the ...