 exercise, HbO~0~ = oxyhemoglobin, StO~0~ = muscle oxygen saturation, VO~0~ = oxygen uptake.](medi-00-e00000-g000){#F0}  ![Data of ΔStO~0~ for both ACE and ACE+FES-LCE (arm) exercise plotted by subjects. ACE+FES-LCE(arm) = hybrid arm exercise, StO~0~ = muscle oxygen saturation, VO~0~ = oxygen uptake.](medi-00-e00000-g000){#F0}  ![Data of ΔStO~0~ for both ACE and ACE+FES-LCE (arm) exercise plotted by subjects. ACE+FES-LCE(arm) = hybrid arm exercise, StO~0~ = muscle oxygen saturation, VO~0~ = oxygen uptake.](medi-00-e00000-g000){#F0}  