So, back to HIIT. I'm considering it for a change-up in the routine. Right now I play soccer on Fridays, might do Saturday too. Sunday or Monday is leg day at the gym, and Wednesday I do some running on the street. Considering making that Wednesday be HIIT day instead. Does HIIT really knock down the leg muscles, or will I still be able to play soccer on Friday night? And for HIIT, how do you measure the 30-sec intervals between jog/sprint?
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