The valsalva maneuver revisited: the influence of voluntary breathing on isometric muscle strength.
The valsalva maneuver revisited: the influence of voluntary breathing on isometric muscle strength.
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DOI：
10.1519/jsc.0b013e31818eb256
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发表时间：
2009-01
影响因子：
3.2
通讯作者：
Li S
中科院分区：
文献类型：
--
作者：
Ikeda ER;Borg A;Brown D;Malouf J;Showers KM;Li S
We assessed the effect of four voluntary breathing conditions on maximal voluntary isometric force of large muscle groups. Ten subjects performed maximum voluntary isometric contractions (MVIC) of knee flexion and extension, shoulder abduction and adduction, and elbow flexion and extension under all breathing conditions: normal breathing, forced inhalation, forced exhalation, and the Valsalva maneuver (VM). Forced exhalation significantly increased peak force during shoulder adduction, elbow extension and knee extension MVIC tasks (p=0.001, p=0.024, p=0.002, respectively); the peak force during the Valsalva maneuver was not different from forced exhalation for all tested muscle groups. No voluntary breathing condition appeared to influence the peak force during knee flexion, elbow flexion and shoulder abduction MVIC tasks. The results demonstrate that voluntary breathing imposes a significant impact on isometric muscle strength. Given increased cardiovascular risks associated with the Valsalva maneuver, it is highly recommended that forced exhalation should be used during exercises at maximal levels, especially in repetitive repetitions.
