Feasibility and Safety of High-intensity Exercise Training in Patients Surviving COVID-19

"Feasibility and safety of 3 different training protocols will be tested. Therefore the intervention is three different exercise protocols (4X4, 6X1, and 10-20-30). The exercise workload is set according to the patients HRmax or wattmax from a VO2max test at the baseline testing. All training protocols have a duration of 38 minutes and start with a 10-minute warm up and a 3-7-minute cool-down period. The intervals in the training protocols are interspersed with a 3-minute active rest. Therefore the three exercise protocols are matched on duration, and they all fall within the category of high-intensity-interval training.~The accumulated time spend with a heart rate \>85% of HR max will be evaluated to determine the intensity."