Source: https://www.researchgate.net/profile/Anne-Gabrielle-Mittaz-Hager/publication/318322745_La_force_isometrique_maximale_de_la_flexion_et_de_l'extension_du_genou_a_l'aide_d'un_dynamometre_manuel_une_etude_de_reproductibilite/links/59637dfdaca2728c112104a1/La-force-isometrique-maximale-de-la-flexion-et-de-lextension-du-genou-a-laide-dun-dynamometre-manuel-une-etude-de-reproductibilite.pdf