*2.1. Subjects*

This study was developed according to the Declaration of Helsinki, and all the subjects signed an approved informed consent. Lower limb displacement was measured in 14 young healthy subjects (five females and nine males; age: 25 ± 2 years old; height: 167.9 ± 10.1 cm; and body mass: 58.7 ± 10.3 kg). Subjects were free of any lower-limb musculoskeletal-related injury for at least 3 years before testing.
