| Autor: |
OLIVA, VIKTOR, BUZGO, GABRIEL, NOVOSAD, ADRIAN, VAJDA, MATEJ |
| Zdroj: |
Journal of Physical Education & Sport; Dec2020, Vol. 20 Issue 6, p3436-3444, 9p |
| Abstrakt: |
The purpose of this study was to compare the stability of the range of squat motion and the efficiency of the bottom position of squatting among athletes of different squat performance levels. Two groups of trained male subjects, non-squatters (NSG; n=24; age=22.6±2.8 y; body height (BH)=180.5 ± 6.5 cm; body weight (BW)=75.4 ± 11.3 kg) and squatters (SG; n=19; age=24.3±1.2 y; BH=183.2 ± 4.4 cm; BW=85.5 ± 10.9 kg), performed a progressive loading diagnostic test during a high-bar back squat with a calf raise via a linear position transducer and dynamometric force plate. The load was derived from the BW of a subject (0-100% of BW). The stability of the range of squat motion and the efficiency of the bottom position of the squat was measured by parameters such as the eccentric range of squat motion related to BH, the variation coefficient of eccentric range of motion (ROM), and power output during the concentric and the acceleration phases. Significant differences between groups were found in the eccentric range of squat motion and in the eccentric range of squat motion related to BH with a greater range of motion for SG;. The NSG group showed a significantly greater variation in the coefficient of eccentric range of squat motion and the percentage shift of the peak force during the concentric phase. The mean power outputs during the concentric and acceleration phases and peak force production during the concentric phase were significantly greater for SG;. There was a significantly greater force by the athletes and barbell (FW) and peak force ratio for the bottom position of the squat (FmaxBPS) for the SG; in favour of FmaxBPS for each load. For the FW and peak force during the concentric phase (FmaxCONC) ratio, significant differences between groups were also observed for each load with a larger ratio for SG; in favour of FmaxCONC. Our results suggest that a person who effectively masters the squat can subsequently generate greater force and higher power output during the concentric and the acceleration phases of a squat. We also predict more stable ROM when performing a squat, especially when increasing external resistance, which can contribute to reducing the risk of injury during the training process. [ABSTRACT FROM AUTHOR] |
| Databáze: |
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