There are multiple definitions:

1. force-extension curve(English)

   • WLC
   • Physiology

2. functional exercise capacity(English)

   • HIAIT, AIS, FVC, FEV1, FEV1/FVC, MVV, VF, 6MWT, PE, HFrEF
   • Exercise & Training, Physiology, Nutrition, Cardiology, Rehabilitation
   • https://doi.org…300060517715375
   • https://doi.org…000000000002932