Cross Transfer Effects of Conditioning and Deconditioning on Muscular Strength

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Abstract
The purpose of the investigation was to study the effects of inactivity periods of 1, 4, 6, and 8 weeks on the retention of recently acquired levels of muscular strength in the ipsilateral and contralateral arms. The aubject8 (80 experimental and 20 control) were right-handed mole volunteers, 18 to 22 yr. The experimental subjects participated three times weekly in a 6-week high-intensity, low-repetition strength conditioning programme. Following training, the trained subjects were randomly divided into four experimental groups and stopped training for 1,4, 6, or 8 weeks. Upon completion of the inactivity periods, a retention test was administered to both arms. The data analysis revealed that all experimental groups enhanced their isometric strength levels significantly in both arms during conditioning, thus demonstrating the phenomenon of cross-transfer of isometric strength. No significant differences were found for the control group. It was also found that all experimental groups retained a significant amount of isometric strength acquisition in both arms following the inactivity periods. No significant amount of strength was lost in the conditioned as well as the unconditioned arm despite 1 week of detraining. However, detraining of 4, 6, and 8 weeks resulted in a significant loss in both arms. Finally, no significant differences were found between the 6- and 8-week inactivity groups in the conditioned as well as the unconditioned arm.

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