Six-minute walk test
To assess aerobic endurance, the study participants had to walk along a 30-m shuttle track in the fastest 6-min walk test pace as far as possible for 6 min. Additionally, the participants were also allowed to reduce their 6-min walk test speed during the testing and if needed to take short breaks. The 6-min walk test was carried out and runs were repeated. The time with the faster performance in seconds was considered as valid result [