Kobayashi Kotono, Yagi Masahide, Tateuchi Hiroshige, Ota Megumi, Umehara Jun, Sakata Haruka, Okada Sayaka, Ichihashi Noriaki
Human Health Sciences, Graduate School of Medicine, Kyoto University, 53 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto, 606-8507, Japan.
Faculty of Rehabilitation, Kansai Medical University, 18-89 Uyama Higashimachi, Hirakata, Osaka, 573-1136, Japan.
Eur J Appl Physiol. 2023 Apr;123(4):797-807. doi: 10.1007/s00421-022-05099-8. Epub 2022 Dec 3.
This study aimed to examine the effect of age on the mechanical properties, muscle size, and muscle quality in the upper and lower limb and trunk muscles.
We evaluated the shear modulus (G), muscle thickness (MT), and echo intensity (EI) of the upper and lower limb and trunk muscles of 83 healthy women (21-83-year-old). The G values of some limb muscles were measured in relaxed and stretched positions.
Regarding the effect of age on G at the distinct positions, the G of the upper limb muscles were not significantly correlated with age in the relaxed and stretched positions. In contrast, the G of the iliacus showed a significant negative correlation in both positions. Additionally, the G of the rectus femoris had a significant negative correlation only in the relaxed position. Regarding differences among body parts, the G of the lower limb and oblique abdominal muscles showed a significant negative correlation, but no correlation in the upper limb, rectus abdominis, and back muscles. Moreover, MT showed a significant negative correlation with age in the lower limb, abdominal, and erector spinae muscles, but no correlation was detected in the upper limb and lumbar multifidus muscles. EI had a significant positive correlation in all the muscles.
The effect of age on G depended on body parts, and the G of the lower limb and oblique abdominal muscles negatively associated with age. Additionally, G in the relaxed position may be more susceptible to aging than G in the stretched position.
本研究旨在探讨年龄对上肢、下肢及躯干肌肉的力学性能、肌肉大小和肌肉质量的影响。
我们评估了83名健康女性（21 - 83岁）上肢、下肢及躯干肌肉的剪切模量（G）、肌肉厚度（MT）和回声强度（EI）。在一些肢体肌肉的放松和伸展位置测量其G值。
关于年龄对不同位置G值的影响，上肢肌肉在放松和伸展位置的G值与年龄均无显著相关性。相比之下，髂肌在两个位置的G值均呈显著负相关。此外，股直肌仅在放松位置的G值呈显著负相关。关于身体部位之间的差异，下肢和腹外斜肌的G值呈显著负相关，但在上肢、腹直肌和背部肌肉中无相关性。此外，下肢、腹部和竖脊肌的MT与年龄呈显著负相关，但在上肢和腰多裂肌中未检测到相关性。EI在所有肌肉中均呈显著正相关。
年龄对G值的影响取决于身体部位，下肢和腹外斜肌的G值与年龄呈负相关。此外，放松位置的G值可能比伸展位置的G值更容易受到衰老的影响。
