提氣動作對地面反作用力的影響

Effect of Breathing Movement on Ground Reaction Force

戴偉勳(Wei-Hsun Tai)

《文化體育學刊》 17輯 (2014/03) Pp. 61-68

https://doi.org/10.6634/JPSS-CCU.201403.17.06

摘要

在舞蹈訓練內容中，舞者總是被要求著地碰撞時的聲音能盡量降低，進而產生了利用提氣或是屏息的技術來降低下肢碰撞力量。本研究的目的為探討提氣的方式是否能夠降低著地的地面反作用力。實驗參與者為14名體育系學生（8位男性與6位女性），他們的平均年齡、體重與身高分別為19.3 ± 0.9歲，64.5 ± 9.7公斤和169.4 ± 9.1公分。每位實驗參與者進行插腰垂直跳動作並分別進行自然著地與提氣著地兩種。使用Kistler測力板（型號9287BA；採樣頻率1000 Hz）進行垂直跳著地動作的地面反作用力資料收集。結果方面，提氣（52.0 ± 8.6公分）與自然著地（52.2 ± 8.6公分）兩者之間跳躍高度並無顯著差異（p ＞ .05）。此外地面反作用力的第一峰值PK1與第二峰值PK2，到達PK1時間、到達PK2的時間；PK1的受力率與PK2的受力率比較上亦無顯著差異（p ＞ .05）。通過本研究的統計分析顯示出，未受過提氣技術的體育系學生，著地時的提氣動作對於著地的地面反作用力並無降低的現象。

關鍵字

著地 ； 跳躍 ； 動力學

並列摘要

The training in dance programs always require a person to jump with lower impact sounds by the technique of breathing in and holding breath to reduce the rate of injury and to dance with more grace. The purpose of this study was to examine the effect of instructional cue of breathing in and holding breath to lower the peak ground reaction forces (GRF) during landing from the countermovement jump occurring naturally in athletes. Fourteen physical education students (8 males and 6 females) as the participants for this study. Participants' mean age, body weight, and height were 19.3 ± 0.9 years old, 64.5 ± 9.7 kg, and 169.4 ± 9.1 cm respectively. Every participant was asked to perform the natural maximal vertical jumps barefoot in the condition of breathing in and holding breath to land following one's inherent pattern. A Kistler force platform (type: 9287BA; sampling rate: 1000 Hz) was used to acquire vertical jumps and to assess the landing forces. The analysis of flight height for pre-intervention (52.2 ± 8.6 cm) and post-intervention (52.0 ± 8.6 cm) showed no difference (p ＞ .05). The results indicated that there were no significant differences (p ＞ .05) in first peak GRF (pK1, pre: 2.12 ± 0.63 BW; post: 2.00 ± 0.71 BW), second peak GRF (pK2, pre: 5.60 ± 1.75 BW; post: 4.89 ± 1.52 BW), time to PKI (pre: 15.9 ± 6.4 ms; post: 15.6 ± 4.7 ms), time to PK2 (pre: 64.6 ± 11.1 ms; post: 67.2 ± 12.6 ms), load rate of PK1 (pre: 156.17 ± 80.13 BW/s; post: 148.00 ± 109.20 BW/s), and load of PK2 (pre: 93.66 ± 49.59 BW/s; post: 77.17 ± 33.35 BW/s). Researchers took into account that most participants were accustomed to land in their own patterns, and the temporary instruction of breathing in and holding breath did not seem to decrease landing force.

並列關鍵字

landing ； jump ； kinetics

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