Neuromuscular interactions around the knee in children, adults and elderly

Figure 3 Strain-force curves of the vastus lateralis tendon and aponeurosis. The strain values at every 200 N and at maximum calculated tendon force during maximal voluntary isometric knee flexion contraction are displayed. The curves end at 1400 N for the old adults and at 1800 for the young ones, these values correspond to the maximum common force achieved by all subjects in either group, old and young adults. Y: Young (n = 12); O: Old adults (n = 14); Means and SEM; Age effect: (^aP < 0.05) vs young.