Fig. 4From: Correlation between cardiopulmonary metabolic energy cost and lower-limb muscle activity during inclined treadmill gait in older adultsa) Correlation between the net cardiopulmonary metabolic energy cost and percentage of MVC in the stance phase of the gait cycle during inclined treadmill walking (*p < 0.05). b) Correlation between net cardiopulmonary metabolic energy cost and the percentage of MVC in the swing phase of the gait cycle during inclined treadmill walking. RA, rectus abdominis; ES, erector spinae; RF, rectus femoris; BF, biceps femoris; VM, vastus medialis; TA, tibialis anterior; GCM, medial head of the gastrocnemius; SOL, soleus (*p < 0.05)Back to article page