Protocol
The adolescents were recruited during a regular medical visit, and they
were assessed over two days with a one-week interval. On the first day,
the adolescents performed muscle strength assessment tests, completed
the HRQoL questionnaire, and received a triaxial accelerometer to wear
on their waist for seven days. On the second visit, the adolescents
returned the accelerometer and performed a maximal cardiopulmonary
exercise test (CPET). This study was conducted between August 2018 and
March 2019. Blinded assessors to the group allocation performed all the
assessments.