Sleep Quality Impacts Training Responses and Performance in Elite Swimmers.

In males, sleep duration hrs was negatively related to workout strain ( r = −0.861, p = 0.001) (Figure 1 , panel A2), ExHR avg ( r = −0.757, p = 0.011) (Figure 1 , panel B2), and ExHR max ( r = −0.827, p = 0.003), and there was a nonsignificant trend between SWS hrs and ExHR avg ( r = −0.628, p = 0.052) (Figure 3 , panel A2).

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