The study conforms to a randomized, single-blinded, placebo-controlled parallel study design.~a prebiotic supplement will be selected based on a participants gut microbiota. 1 sachet of prebiotic or placebo will be given twice a day over a period of 6 weeks.~Before the start of the study, a VO2max test will be performed. Subjects will bring faecal samples which is collected at home. A time to exhaustion of approximately 80% of their VO2max will be performed at baseline and after the 6 weeks intervention period.
The aim of this study is to investigate the effect of a six-week period personalised food intervention with prebiotic supplementation on intense exercise performance in healthy, recreationally active adults.