Swimming stress and adaptation by dystrophic and normal mice

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Abstract
Dystrophic mice, 5–11 weeks old, from the inbred strain 129/ Re-dy and from the cross between 129/Re-dy and the stock C57BL/6-Miwh/Re swam more slowly than normal littermates. For both normal and dystrophic mice the reduction in swimming speed after forced swimming stress was most marked in the first days of the new experience. No difference was detected in the swimming speeds of DyDy as compared with Dydy mice. But mice of both genotypes swam more rapidly when the temperature of the water was lowered from 95 F to 68 F.