2.4.3. Urine Sample and Analysis
Total urine samples were collected in a light-shielding bottle (500 mL) pre-exercise and 1 and 5 h post-exercise, and immediately stored at −80  °C for further analysis. At each sampling point, urine volume was measured, and the collection time was recorded. We also recorded the time of urination just before exercise. Urinary 8-OHdG, an oxidative derivative of deoxyguanosine implying oxidative damage to DNA [