Subjects
illness or injury
BLIND
A total of 52 healthy active volunteers participated in this study. Subjects were recruited from local sport clubs. All subjects trained 1–3 hours per weeks in sports such as soccer, volleyball, combat sports, and athletics before the Covid lockdown. However, as a result of the national Covid measures, subjects were less active during the 10 weeks before the start of the study because sports facilities were closed. All subjects were informed about the general study idea but were blind to the specific study aims. Subjects had to sign an informed consent form before inclusion. The study protocol was approved by the local ethics committee (Ethikkommission Nordwest-und Zentralschweiz BASEC-ID 2019-0202). All measurements were in accordance with the guidelines from Good Clinical Practice and were in line with the Declaration of Helsinki. Volunteers were included if they were 18–38 years old and did not participate in balance training in the 12 months before the start of the study. An exclusion criterion was a history of illness or injury that could have affected testing or training.