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Fig. 9. Rate of force generation and force generation per meter distance during
running (2.7 m s1) for the examined groups. Values are means
± S.D. of both legs. O, older adults; Y, young
adults. Asterisks indicate statistically significant differences between older
and young adults: *P<0.05, **P<0.01; there was no
age-by-running activity interaction for the analysed parameters
(P>0.05).