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. 2018 Jul 24;6:e5219. doi: 10.7717/peerj.5219

Table 3. Correlation coefficient (P value) between isokinetic and anthropometric variables and energy running cost (Ec) for male runners.

Ec at 10 km h−1 with a 3% gradient (n = 24) Ec at 11 km h−1 with a 1% gradient (n = 24) Ec at 12 km h−1 with a 3% gradient (n = 9) Ec at 14 km h−1 with a 1% gradient (n = 9)
Isokinetic variables
Conventional strength balance ratio 0.01 (0.98) 0.23 (0.29) 0.05 (0.90) 0.29 (0.47)
Functional strength balance ratio −0.29 (0.18) −0.43 (0.04) −0.72 (0.04) 0.09 (0.82)
Absolute peak torque of extensor muscles at 60°  s−1 in concentric action (Nm) −0.01 (0.97) −0.01 (0.97) 0.56 (0.14) −0.14 (0.73)
Peak torque relative to body mass of extensor muscle at 60°  s−1 in concentric action (%) −0.16 (0.47) −0.02 (0.92) 0.32 (0.43) −0.14 (0.72)
Absolute peak torque of flexor muscles at 60°  s−1 in concentric action (Nm) 0.01 (0.95) 0.08 (0.71) 0.61 (0.10) 0.01 (0.99)
Peak torque relative to body mass of flexor muscle at 60°  s−1 in concentric action (%) −0.14 (0.50) 0.11 (0.60) 0.31 (0.44) 0.02 (0.96)
Absolute peak torque of extensor muscles at 180°  s−1 in concentric action (Nm) 0.16 (0.47) 0.01 (0.97) 0.63 (0.09) −0.19 (0.64)
Peak torque relative to body mass of extensor muscle at 180°  s−1 in concentric action (%) 0.05 (0.80) −0.01 (0.97) 0.49 (0.21) −0.21 (0.60)
Absolute peak torque of flexor muscles at 180°  s−1 in concentric action (Nm) 0.10 (0.62) −0.25 (0.25) 0.31 (0.45) 0.02 (0.95)
Peak torque relative to body mass of flexor muscle at 180°  s−1 in concentric action (%) −0.08 (0.71) −0.20 (0.37) −0.10 (0.80) 0.02 (0.95)
Absolute peak torque of extensor muscles at 180°  s−1 in eccentric action (Nm) 0.30 (0.16) 0.25 (0.25) 0.72 (0.04) −0.16 (0.69)
Peak torque relative to body mass of extensor muscles at 180°  s−1 in eccentric action (%) 0.15 (0.70) 0.60 (0.09) 0.47 (0.19) −011 (0.76)
Absolute peak torque of flexor muscles at 180°  s−1 in eccentric action (Nm) 0.30 (0.16) 0.35 (0.10) −0.16 (0.69) −0.68 (0.06)
Peak torque relative to body mass of flexor muscles at 180°  s−1 in eccentric action (%) 0.22 (0.57) 0.68 (0.04) −0.41 (0.26) −0.56 (0.11)
Total body mass (kg) 0.18 (0.26) −0.04 (0.92) 0.62 (0.10) 0.05 (0.95)
Fat-free mass (g) 0.27 (0.21) 0.10 (0.63) 0.58 (0.13) −0.02 (0.96)
Fat-free mass (%) −0.11 (0.59) 0.18 (0.41) −0.31 (0.44) 0.23 (0.58)