Graduate School of Natural Science & Technology, Kanazawa University, Japan.
Int J Sports Physiol Perform. 2009 Sep;4(3):355-66. doi: 10.1123/ijspp.4.3.355.
This study aimed to compare the laterality, and its gender difference, of hand grip and elbow flexion power according to load in right hand-dominant individuals.
The subjects were 15 healthy young males (age 22.1 +/- 0.7 y, height 171.3 +/- 3.4 cm, mass 64.5 +/- 4.1 kg) and 15 healthy young females (age 22.4 +/- 1.0 y, height 161.1 +/- 3.0 cm, mass 55.4 +/- 4.6 kg). Isotonic peak power was measured with 6 different loads ranging from 20% to 70% of maximum voluntary contraction (MVC) for grip and elbow flexion movements.
The peak power was significantly larger in males than in females in both movements (ratio, males:females was 58.1:49.4%). The dominant right hand had larger peak power in all loads for hand grip power (ratio, dominant:nondominant was 83.6:71.1%) and in loads of 20% to 50% MVC for elbow flexion power (88.7:85.7%) in both genders, confirming laterality in both movements. The peak power ratio of the dominant right hand to the nondominant left hand was significantly larger in hand grip than in elbow flexion for all loads in females.
Even though laterality was confirmed in both grip and elbow flexion, gender difference is more marked in hand grip.
本研究旨在比较右利手个体在不同负荷下的手握力和肘屈伸力的优势侧及其性别差异。
研究对象为 15 名健康年轻男性（年龄 22.1±0.7 岁，身高 171.3±3.4cm，体重 64.5±4.1kg）和 15 名健康年轻女性（年龄 22.4±1.0 岁，身高 161.1±3.0cm，体重 55.4±4.6kg）。采用 6 种不同负荷（最大自主收缩（MVC）的 20%至 70%）对握力和肘屈伸运动进行等速峰值功率测量。
在两种运动中，男性的峰值功率均明显大于女性（比率，男性：女性为 58.1：49.4%）。在手握力的所有负荷中（优势侧：非优势侧为 83.6：71.1%）和男女两性肘屈伸力的 20%至 50%MVC 负荷中（优势侧：非优势侧为 88.7：85.7%），优势右手的峰值功率均大于非优势左手，证实了两种运动的优势侧。在女性中，在所有负荷下，优势右手的峰值功率与非优势左手的比值在握力中均明显大于肘屈伸力。
尽管在握力和肘屈伸中均证实了优势侧，但在握力中性别差异更为明显。
