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An hour of intense weight lifting for someone not used to it is a LOT. A lot of muscle heads don’t even lift that long.
I suspect -- but could stand corrected -- that NIH is talking about a "typical" heavy lifting session of an hour, rather than muscles under actual anaerobic tension for an hour. I mean, that would correlate to a session of several hrs.
know that feeling where your body tells you it is dying?
yeah, the liver's job is to clean that up so you dont die...
and other organs produce those enzymes, so it is only the "liver" that is responding... called them liver enzymes because most come from it
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