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However, at lower levels of physical activity, an association emerged between race and sleep minutes, illustrating that youth most at risk for shorter sleep were Black adolescents with lower physical activity. Conclusions Findings suggest that for Black adolescents, physical activity is a protective factor against short sleep duration and, conversely, low physical activity is a vulnerability factor. (PsycInfo Database Record (c) 2021 APA, all rights reserved).Recent research has found that maintaining an item in working memory improves s