One hour workouts 4x a week with a personal trainer. I only started working out a year ago, but these blood tests were done after I had been working out 8-9 months, not just restarting after a rest as many have mentioned.
The tests in the articles are on people who just started weightlifting, but I did not see any testing of people used to weightlifting. From what I read, it sounds like the enzyme levels are higher because of the muscle damage caused by weightlifting. If that's the case, it doesn't make sense to me that the enzymes would become normal after weightlifting for a while, because you're still going to be damaging and repairing the muscles every week.
Here are a couple of articles:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2291230/
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5158103/
The tests in the articles are on people who just started weightlifting, but I did not see any testing of people used to weightlifting. From what I read, it sounds like the enzyme levels are higher because of the muscle damage caused by weightlifting. If that's the case, it doesn't make sense to me that the enzymes would become normal after weightlifting for a while, because you're still going to be damaging and repairing the muscles every week.