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台湾研究发现游泳可增加骨头韧性

2011/12/29 来源:中国新闻网
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据“中央社”报道,台湾成功大学体育健康与休闲研究所副教授黄沧海研究发现,游泳可使骨头组织对抗外力能力增加,使骨头不易断裂。

游泳

据“中央社”报道,台湾成功大学体育健康与休闲研究所副教授黄沧海研究发现,游泳可使骨头组织对抗外力能力增加,使骨头不易断裂。

据报道,黄沧海利用大鼠进行游泳增益骨头韧性的研究,这项研究成果已刊登在国际骨质疏松症基金会所发行的Calcified Tissue International杂志上。

黄沧海28日说,过去的研究一直认定游泳对骨骼健康没有助益,不利于骨质密度(BMD)及骨质含量(BMC),但较高的BMD 和BMC 是否等于骨骼健康,没有明确定论。骨密度值正常者,依然会发生骨折,意谓着骨密度和骨含量不完全代表骨头的力学特性。

因此,黄沧海以雄性大鼠为实验对象,每天1小时,每周5天,持续8周施以游泳训练,游泳训练后的大鼠,体重、肌肉、股骨质量及尺寸都变轻变小,BMD和BMC也变低。

黄沧海发现,游泳训练的大鼠,股骨可承受更多的变形,吸收较多的能量,但这只是初步成果,是否适用于人类,有待进一步研究。

黄沧海说,游泳不只对骨骼健康有帮助,对心血管、气管及复健也有助益,是项有益身心健康的运动,可以多参与。

 

Swimming Training Increases the Post-Yield Energy of Bone in Young Male Rats

Tsang-Hai Huang, Sandy S. Hsieh, Shing-Hwa Liu, Feng-Ling Chang, Shang-Chih Lin and Rong-Sen Yang

The purpose of this study is to investigate the effects of non-weight-bearing exercise on growing bone. Male Wistar rats (7 week-old) were assigned to one baseline control group, one control group and two swimming training groups, which were trained with 2 and 4% body-weight mass added, respectively. After an 8-week training period, three groups showed significant development compared to the baseline control group. Among the three 15-week-old groups, swimming-trained rats were lower in body weight (BW), densitometry and size-related measurements. In femoral biomechanical testing, swimming training groups were significantly lower in yield moment and ultimate moment, which may be due to a significantly lower long bone cross-sectional moment of inertia. However, the two swimming groups were higher in post-yield energy absorption and displacement. Further, in estimated tissue-level biomaterial properties, no differences were shown in yield stress, strain or toughness among the three groups. Using BW as a covariate, results of ANCOVA showed no differences in size-related parameters among the three groups, and some parameters were even higher in the two swimming groups. Regarding Pearson’s correlation, size-related parameters correlated well to BW and whole bone strength but not to tissue post-yield behaviors. In conclusion, when compared to age-matched control group, swimming rats showed lower bone strength and lower yield energy absolutely at the structural level, but similar yield stress and yield toughness at the tissue level. Moreover, swimming training benefited growing bone in post-yield behaviors. Further studies should investigate the parameters that contribute to this exercise-induced post-yield behavior.

文献链接:http://www.springerlink.com/content/et50835141321040/

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