Effects of Acute Exercise Intensity on Cerebral Blood Flow and Cognitive Function in Older Adults

In this experimental intervention subjects will cycle continuously at moderate intensity (VO2 corresponding to lactate threshold) until a 200 kcal equivalent energy expenditure is reached.

In this experimental invention subjects will alternate between 1 minute of high intensity cycling (watts corresponding to 85% VO2peak) and 1 minute of low intensity cycling (watts corresponding to 35-40% VO2peak) until a 200 kcal equivalent energy expenditure is reached.

In this intervention placebo, subjects will lay down on a flat, soft surface for 30 minutes in a dimly light room. They will not be allowed to use any electronic devices or read during this time to avoid potentially influencing continuous data recording.