What would happen to glomerular filtration while you are doing exercise?
The factors that influence glomerular filtration rate are very complex and involve many different electrolytes and minerals such as potassium, sodium, calcium, etc. as well as hormones, particularly adrenalin. While you are exercising, your adrenal glands become more active and if you stress your body too much, you also release cortisol. Both of these hormones can affect glomerular filtration rates but generally, the rates are relatively stable, even when exercising. In short, it can affect filtration but not to a large degree unless you significantly overstress your body.
