Study timeline
After randomization, and within 2 weeks before the intervention period, the subjects met three times in the laboratory where two of them were for metabolic testing and the last one for a blood draw. Additionally, the participants met once at an indoor track and field arena. All subjects had at least 1 day of rest preceding each of the test days (see below). The tests were repeated in the same order for each individual post intervention. The training interventions all consisted of three sessions per week for 8 weeks.