Hagins Marshall, Pietrek Markus, Sheikhzadeh Ali, Nordin Margareta
Division of Physical Therapy, Long Island University, One University Plaza, Brooklyn, NY 11201, USA.
Clin Biomech (Bristol). 2006 Oct;21(8):775-80. doi: 10.1016/j.clinbiomech.2006.04.003. Epub 2006 Jun 6.
Evidence exists linking breath control to increases in intra-abdominal pressure and lumbar stability. Weight-lifting experts use this evidence as a rationale to suggest that increases in lumbar stability afforded by specific forms of breath control can influence the amount of force produced by the trunk. No studies have examined this issue. Therefore, this study determined whether voluntary control of the breath is related to maximal trunk extension force and if maximal force is correlated to intra-abdominal pressure.
Thirteen men and 20 women (mean age: 25.6 years (5.5)) performed a maximal isometric trunk exertion in a knee bent posture using voluntary breath conditions: (1) inhalation prior to exertion with hold during exertion; (2) exhalation prior to exertion with hold during the exertion; (3) inhalation prior to the exertion with exhalation during the exertion. A subset of subjects (n=11) were also simultaneously measured for intra-abdominal pressure. Separate repeated measures ANOVA were used to determine the effects of breath conditions on force and intra-abdominal pressure. Pearson coefficients were used to determine the correlation between force and intra-abdominal pressure.
Breath control did not significantly affect isometric force production (P=.089) but did affect intra-abdominal pressure (P=.003). Correlations between force and intra-abdominal pressure in each breath condition were low (range: 0.152-0.583).
Although breath control was shown to influence intra-abdominal pressure, it does not appear to influence isometric trunk extension force in a knees bent position. Further, the intra-abdominal pressure produced in such efforts appears to be unrelated to the amount of force produced.
有证据表明呼吸控制与腹内压升高及腰椎稳定性增加有关。举重专家以此为依据，认为特定形式的呼吸控制所带来的腰椎稳定性增加，会影响躯干产生的力量大小。但尚无研究探讨过此问题。因此，本研究旨在确定呼吸的自主控制是否与躯干最大伸展力相关，以及最大力量是否与腹内压相关。
13名男性和20名女性（平均年龄：25.6岁（5.5））在屈膝姿势下，通过自主呼吸状态进行最大等长躯干用力：（1）用力前吸气并在用力过程中保持；（2）用力前呼气并在用力过程中保持；（3）用力前吸气并在用力过程中呼气。对部分受试者（n = 11）同时测量腹内压。采用独立的重复测量方差分析来确定呼吸状态对力量和腹内压的影响。使用皮尔逊系数来确定力量与腹内压之间的相关性。
呼吸控制对等长力量产生没有显著影响（P = 0.089），但对腹内压有影响（P = 0.003）。每种呼吸状态下力量与腹内压之间的相关性较低（范围：0.152 - 0.583）。
虽然呼吸控制被证明会影响腹内压，但在屈膝姿势下似乎不会影响等长躯干伸展力。此外，这种用力过程中产生的腹内压似乎与产生的力量大小无关。
