Kanazawa University Graduate School of Natural Science and Technology, Kakuma, Kanazawa, Ishikawa 920-1192, Japan.
Arch Gerontol Geriatr. 2011 May-Jun;52(3):e176-9. doi: 10.1016/j.archger.2010.10.025. Epub 2010 Dec 4.
This study aimed to clarify the age-level difference of hand grip power in females. The subjects were 15 healthy young females (mean age 21.5 ± 1.4 years, mean height 159.5 ± 2.9 cm, mean mass 52.6 ± 6.1 kg) and 15 elderly females (mean age 65.0 ± 2.6 years, mean height 155.2 ± 5.3 cm, mean mass 56.5 ± 7.3 kg). Peak velocity of the dominant hand was measured using three different loads of 30, 40 and 50% of maximum voluntary contraction (MVC). The MVC and hand grip power were meaningfully greater in the young group than in the elderly group. The peak velocity in all loads showed a meaningful difference between both groups and it was faster in the order of 30, 40 and 50% MVC in both groups. The required time to reach peak velocity at 50% MVC was meaningfully longer in the elderly group, but was significantly shorter at 30% MVC than at 40 and 50% MVC in both groups. In conclusion, the age-level difference in hand grip power using relative loads depends more greatly on MVC than velocity in females. The muscle tensile related to hand grip movement decreases with age.
本研究旨在阐明女性握力的年龄差异。受试者为 15 名健康的年轻女性（平均年龄 21.5±1.4 岁，平均身高 159.5±2.9cm，平均体重 52.6±6.1kg）和 15 名老年女性（平均年龄 65.0±2.6 岁，平均身高 155.2±5.3cm，平均体重 56.5±7.3kg）。使用 30%、40%和 50%最大自主收缩（MVC）的三种不同负荷测量优势手的最大速度。年轻组的 MVC 和握力明显大于老年组。两组之间所有负荷的最大速度均有显著差异，按 30%、40%和 50%MVC 的顺序，两组的速度均较快。老年组达到 50%MVC 最大速度所需的时间明显较长，但两组均明显短于 40%和 50%MVC。总之，女性使用相对负荷的握力年龄差异在很大程度上取决于 MVC 而不是速度。与手抓运动相关的肌肉拉伸随年龄增长而减少。
