The Effect of an Acute Bout of Exercise on Serum Vitamin D Concentration

"Each participant will undergo a single 60-minute treadmill-based exercise intervention in a randomised order.~Treadmill settings are generated based on settings which correspond to participants exercising at 60% VO2 max from their maximal exercise test on visit 2. To confirm that participants are exercising at 60% during the hour session, 1 minute samples of expired air are taken at 15 minute intervals and immediately analysed to check % VO2 max. Participants heart rate and RPE measures are also taken at 15 minute intervals throughout the exercise session and cross-checked against predicted values at 60% VO2 Max."

Each participant will undergo a 60-minute rest period in a randomised order.