Hi, why should exercising cause a trace amount of blood in urine test? Also if orange juice, coffee, and cola is drank within 3 or 4 hrs of urine test at Physician's office can that give false creatinine and albumin readings?

Myoglobin. Working out hard releases a little myoglobin into your bloodstream and thence the urine, and pounding the pavement can wreck some red cells and their contents leaks into the urine. There is no "false" creatinine urine assay; it's a normal component that varies with your muscle mass. It won't give false albuminuria. The most common cause of protein in the urine is orthostatic proteinuria, harmless.