I have been working on improving my health. I read about glucose, ATP, oxygen delivery etc. But when I am cross training and pushing myself, what is happening in my muscles? Do you grow more capillaries to deliver more oxygen to clear waste? Lactate forms, and exercising with lactate present improves muscle “tolerance” to it. But again, what is improving? Does your body produce more enzymes?
Edit: I want to differentiate the training I am talking about versus traditional “over loading” weight lifting (muscles get bigger)
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Many changes occur with training. One of the first is neurological where your body makes more connections from the brain to the muscle so more fingers can activate and also better coordination within the muscle and between muscles (synergy). You increase vascularity, more arterial and vein connections for blood flow. Greater mitochondrial density for more energy production. The muscle fibers fortify themselves (this does not necessarily equate to later muscle size). Hormones are better produced and regulated, more hormones that you need and removed when you don’t. Greater tendon and bone density due to increased need to produce force. Enhanced insulin production and regulation therefore assisting on blood sugar regulation. Increased protein synthesis.
I could go on. It gets more fun when you get in to epigenetic changes to DNA
Yes, everybody has to stay open minded, even if something was presented as truth for a long time, some new research method can arrive and turns everything upside down.
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