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EN
The aim of this study was to determine the effects of two various types of power training on the muscle torques and power levels of lower extremities. During four weeks (five days a week) 27 students participated in this study. The training device consisted of an incline plane and a sliding seat. The varied types of power training were achieved by utilizing intermissions between the series of take offs. 4 series of 10 takes-offs with rest periods among series were carried out in A group (120s in length). Whereas the group B carried out the same number of take offs (40 take-offs) continuously. The interval training (group A) resulted in more effective dynamic values of the lower extremities than the continuous training adhered to by group B.
EN
Thirty one young men volunteered to the study. After pre-testing two groups completed 4 weeks (5 days per week) of two versions of power training programs (4x10 take-offs on a inclined plane; intervals 120 or 30s.). Additional external loads to increase external power were applied. Training effects were monitored by: maximal muscle torques (measured under static conditions for the knee, hip and ankle joints) and lactate concentration in the blood. Results of the study showed no significant differences between groups in increase of the sum of muscle torques nor in lactate. Significant differences (up to 26%) were revealed in lactic acid concentration in blood between groups in post training measurements (less while exercising with long intervals).
3
Content available remote The Effect of the Number of Sets on Power Output for Different Loads
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EN
There is much debate concerning the optimal load (OL) for power training. The purpose of this study was to investigate the effect of the number of sets performed for a given load on mean power output (Pmean). Fourteen physically active men performed 3 sets of 3 bench-press repetitions with 30, 40 and 50 kg. The highest mean power value (Pmax) across all loads and Pmean were compared when data were taken from the first set at each absolute load vs. from the best of three sets performed. Pmean increased from the first to the third set (from 5.99 ± 0.81 to 6.16 ± 0.96 W·kg−1, p = 0.017), resulting in a main effect of the set number (p < 0.05). At the 30 kg load Pmean increased from the first to the third set (from 6.01 ± 0.75 to 6.35 ± 0.85 W·kg−1; p < 0.01). No significant effect was observed at 40 and 50 kg loads (p > 0.05). Pmax and velocity were significantly affected by the method employed to determine Pmean at each load (p < 0.05). These results show a positive effect of the number of sets per load on Pmean, affecting Pmax, OL and potentially power training prescription.
4
Content available remote Contralateral effects after power training of isolated muscles in women
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EN
The purpose of that study was to determine the effect of training of one side of the body on changing the value of the muscle torques on trained and untrained sides. Twenty female students from the Warsaw University of Physical Education were subject to a four-week knee joint power training regimen on the specially designed stand. The same load but different rest time between lapses (120 vs. 30 seconds) were applied to both groups. The load was applied in a form of bending moment equal to 30% of MVC. Bilateral knee force was measured on the Biodex System 3 Pro under isometric conditions. Extension of the rest time between lapses resulted in a higher increase of the strength build-up. Power training causes a similar increase of force generating capacity in both groups for untrained leg. Therefore we have to conclude that there is no influence on homogeneous force improvement for untrained leg after power training.
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