I mean, we all know that if you go running daily, you’re gonna be exhausted the first day but will do much better after 2 weeks. But what happens in your body when your endurance improves? Does stuff grow? Is it all muscles? What changes so you’re not out of breath as quickly anymore? What actual physical changes happen?
In: 4
first, as you work out your muscles, you are tearing them to some extent. they redevelop stronger after recovery, which is why you feel sore afterwards.
lactic acid builds up in the muscles as you workout as well, which is the sting you feel while working out. as you train, your lactic acid tolerance increases, helping you go longer.
with stronger muscles, oxygen and energy is used more efficiently at the end.
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