It must be understood though that exercise can work against a person if the scheduled U/A
is 3 days (or less) away.
Anytime you burn fat cells, the stored THC metabolites are released back into the bloodstream. From there, the kidneys filter the THC metabolites and are deposited into the bladder for the eventual exit. This is the main reason why THC carries a longer detection period than other types of drugs.

Therefore, you want to curtail all fat-burning activities and be as dormant as possible until after the scheduled U/A. That way you wont be releasing a bunch of THCA into the bloodstream, which would end up in the urine to be detected.

So if youre subject to subsequent drug tests by the employer, and you wish to continue using during your employment, you may want to consider having a clean substituted sample (or synthetic) waiting in the wings.