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. 2014 Sep;6(3):125-30.
doi: 10.1556/IMAS.6.2014.3.5. Epub 2014 Sep 18.

Muscular adaptations to depth jump plyometric training: Comparison of sand vs. land surface

Hamid Arazi, Mahdi Mohammadi, Abbas Asadi

Muscular adaptations to depth jump plyometric training: Comparison of sand vs. land surface

Hamid Arazi et al. Interv Med Appl Sci. 2014 Sep.

Abstract

The purpose of this study was to compare the effects of plyometric training on sand vs. land surface on muscular performance adaptations in men. Fourteen healthy men were randomly assigned to two training groups: a) Sand Depth Jump (SDJ; N = 7) and b) Land Depth Jump (LDJ; N = 7). Training was performed for 6 weeks and consisted of 5 × 20 repetitions of DJ training on 20-cm dry sand or 3-cm hard court surface twice weekly. Vertical Jump Test (VJT), Standing Long Jump Test (SLJT), 20-m and 40-m sprint, T-test (TT) and one repetition maximum leg press (1RMLP) were performed before and after training. Significant improvements in VJT [4 (ES = 0.63) vs. 5.4 (ES = 0.85) cm], SLJT [8.3 (ES = 0.3) vs. 12.7 (ES = 0.57) cm], and 1RMLP [23.5 (ES = 0.56) vs. 15.3 (ES = 0.49) kg] were seen for both the groups. Likewise, significant decreases were observed for both SDJ and LDJ groups in 20-m [0.3 (ES = 0.72) vs. 0.4 (ES = 1.98) s] and 40-m sprint times [0.2 (ES = 0.4) vs. 0.5 (ES = 0.71) s], and TT [0.5 (ES = 0.62) vs. 0.9 (ES = 0.57) s]. With regard to ES, it can be recommended that athletes used LDJ training for enhancing sprint and jump and SDJ training for improving agility and strength.

Keywords: jumping ability; performance; sand; stretch-shortening cycle.

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Conflict of interest statement

Conflict of interest: None.

Figures

Fig. 1.
Fig. 1.
Significant changes in vertical jump and standing long jump, 20-m and 40-m sprint time, agility T-test and 1RMLP at post-training compared with pre-training values. Values are mean ± SD. SDJ: Sand Depth Jump; LDJ: Land Depth Jump
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