Muscular exercise can cause highly pathological liver function tests in healthy men https://www.excelmale.com/forum/sho...hological-liver-function-tests-in-healthy-men
Strenuous exercise can cause elevated liver enzymes. This is because the so-called liver enzymes are not specific to the liver, they are in muscle as well. However, AST is in much greater concentration in muscle cells than is ALT. Thus, it stands to reason, and this has been born out in studies that strenuous exercise raises AST more than ALT.
If the raise is ALT only. It is very likely the liver. That said, very many things can do it. Most not of a concern at all. Tylenol use can. As can any drug.
Finally, people will proclaim that if you GGT is ok, it is not the liver. This is false. Although GGT is in fact the liver, often in pharmaceutical hepatitis or viral hepatitis AST and ALT is raised and GGT is not
A lot of the literature on pubmed states strenuous exercise can raise both AST and ALT.https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2291230/
Mind you I always thought it was mainly AST that gets elevated so hope it is related to the heavy lifting.