You shouldn't train for 3 days before you take blood. Training influences the results
No. Just no.A bloody Crossfit workout can get right up there for these and so can others.
People straight up told you, don't bother testing ALT values until you are recovered from training by 3+ days.
Intense training has a big impact on ALT values for sure in some people. It could double or triple levels - so you'll could see something upwards of 100 IU/L, which is relatively dramatic and enough to concern a doctor.
But considering that the reference range for ALT levels that we usually see is measured at 7 to 55 IU/L, an ALT of 2800 suggests something more serious.