Discrepancies between Skinned Single Muscle Fibres and Whole Thigh Muscle Function Characteristics in Young and Elderly Human Subjects

Figure 3

Isometric, power tests, isokinetic peak extension, and isokinetic peak flexion of knee joint. We measured in vivo mechanical properties using BTE before biopsy for the in vitro single muscle fibre study. The voluntary participants for the in vivo study were tested before obtaining isokinetic data of left thigh muscle function. YM, young men; Nm, Newton meter; YM, young men; OM, old men; YW, young women; OW, old women; Iso, isometric test with left thigh; Po, power test; IsoKE, isokinetic test left thigh extension peak torque; IsoKF, isokinetic test left thigh flexion peak torque. The units used in peak values are Nm, newton meter, and watts. and show statistically significant differences. (a) Each Iso value (mean ± standard deviation) of YM, OM, YW, and OW is , , , and , respectively. (b) Each Po value of YM, OM, YW, and OW is , , , and , respectively. (c) Each IsoKE value of YM, OM, YW, and OW is , , , and , respectively, and each IsoKF value of YM, OM, YW, and OW is , , , and , respectively. One-way repeated analysis of variance was used. After identifying significant differences among three or more groups, we used the post hoc -test to compare statistical differences between groups.

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