Okay, I barely speak fitness. I just want to know what you call that period at about 10 to 15 minutes of hard riding on a bicycle when the lactic acid/soreness suddenly vanishes and you can ride for hours without stopping. Happens with speed walking, too. You're hoofing it hard, and you feel like your legs are just burning - and poof - instantly you feel fine, and can walk all day as long as you don't stop. What is that?
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I don't speak bicycle. What's it called when...