(2020), they established a multilevel linear model based on the two-wave CEPS longitudinal data, and found that restricting secondary school adolescents’ participation in extracurricular sports to 60 min per day significantly contributed to improved academic gains, while engagement in extracurricular sports for 61 and 120 min per day demonstrated a positive trend in enhancing academic achievement, but the corresponding coefficient did not reach statistical significance.
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Time junior middle school students invested to sports and their cognitive skill development: a time economics perspective.
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