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The Effect of Unilateral Isotonic Strength Training on Contralateral Limb Strength in Older Women

Keith A. CrowleyPatricia J. DoyleChristopher M. ScanlonKristen R. Wood

出版	1994
URL	http://books.google.com.hk/books?id=EH0pHQAACAAJ&hl=&source=gbs_api

註釋Abstract: The purpose of this study was to determine whether an isotonic exercise program would result in a cross-transfer of strength in the upper extremity of older women. The subjects were 11 women (X age = 70.1 +/- 5.0 yr, X ht = 161.4 +/- 7.2 cm, X wt = 68.0 +/- 9.0 kg) who were randomly assigned into an exercise or control group. Pre-tests and post-tests were conducted to determine the 10 repetition maximum (RM) for the triceps and biceps brachii musculature of both upper extremities of all subjects. The exercise group trained the dominant upper extremity 3 days per week for 6 weeks using a modified DeLorme progressive resistive exercise (PRE) protocol. Repeated measures analyses of variance (ANOVA) were performed to determine differences in pre-test and post-test strength values for each upper extremity of the exercise and control groups. Strength significantly increased for triceps from 3.8 +/- 1.0 kg to 5.6 +/- 0.7 kg and biceps from 4.2 +/- 0.6 kg to 5.8 +/- 1.1 kg of the dominant arm for the exercise group, while the control group showed no change. The non-dominant triceps of the exercise group increased in strength from 3.8 +/- 1.0 kg to 4.6 +/- 0.6 kg. However, this difference was not statistically significant. No significant differences were found for the nondominant biceps. The results indicated that PRE isotonic training significantly increased strength in the dominant arm of the exercise group. While our study did not demonstrate a statistically significant cross-transfer effect, its existence cannot be ruled out.