Figure 2. Association between quadriceps isometric strength and levels of exercise capacity and habitual activities.

Figure was created based on a report by Kamiya et al.⁵⁶⁾ Ainsworth et al.⁵⁸⁾ presents a complete list showing the relationship between the different QIS/METs categories.

BW = body weight; MET = metabolic equivalent; QIS = quadriceps isometric strength.