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Figure 4


Fig. 4. Force-strain relationship of the quadriceps femoris tendon and aponeurosis during maximal knee extension effort for the three groups (mean ± 1 s.d.). Group 1, high running economy; Group 2, moderate running economy; Group 3, low running economy. *Statistically significant differences in maximal tendon strain between group 1 and the other two groups (P<0.05).