Table 1.
Individual physical characteristics of control and experimental groups.
Data: Mean ± SD.
Fig 1.
Schematic representation of the hip extension protocol.
1. Software SmartCoach; 2. Sensor SmartCoach; 3. Kbox3.
Fig 2.
Schematic representation of the protocol.
The specific test protocol focused on repeat power ability and consisted of four sets of seven (plus two repetitions to accelerate the inertia) unilateral coupled CON-ECC all-out hip extensions, with 30 seconds’ rest between sets (Table 2).
Table 2.
Data: mean ± SD.
Fig 3.
Td: delay time; Tc: contraction time; Dm: maximal radial displacement.
Table 3.
Comparison of the power and velocity output during iso-inertial exercise in the 0.1 kg·m2 and 0.075 kg·m2 groups.
Fig 4.
Muscle contractile properties changes immediately, 24h, 48h and 72h after control condition and iso-inertial exercise.
Panel A: semitendinosus muscle of the control group; Panel B: biceps femoris muscle of the control group; Panel C: semitendinosus muscle of the 0.01 group; Panel D: biceps femoris muscle of the 0.1 group; Panel E: semitendinosus muscle of the 0.075 group; Panel F: biceps femoris muscle of the 0.075 group. Data are mean and 90% confidence interval. Tc: contraction time; Dm: maximal radial displacement of the muscle belly; Td: delay time; V10: muscle contraction velocity at 10% Dm; V90: muscle contraction velocity at 90% Dm. ****almost certainly, ***very likely, **likely, *possibly differences in relation to baseline (pre) measurement.
Fig 5.
Standardized difference (effect size) between 0.01 and 0.075 groups in the muscle contractile proprieties changes immediately, 24h, 48h and 72h after iso-inertial exercise.
Panel A: Pre- vs. Post; Panel B: Pre- vs 24h; Panel C: Pre- vs. 48h; Panel D: Pre- vs. 72h. Bars are 90% confidence interval. Grey area represents the smallest worthwhile difference (0.2 based on Cohen’s principle). ST: semitendinosus muscle; BF: biceps femoris muscle. Tc: contraction time; Dm: maximal radial displacement of the muscle belly; Td: delay time; V10: muscle contraction velocity at 10% Dm; V90: muscle contraction velocity at 90% Dm.