Clinical Research Directory

The First-Night Effect and Sex Differences in Strength and Muscular Endurance Performance

Sponsor: University of Alcala

Summary

Introduction: The first-night effect, characterized by disturbed sleep in an unfamiliar environment, may impair next-day physical performance. However, whether this response differs between men and women remains unclear. This study investigated sex differences in the effects of sleeping in an unfamiliar environment on strength and muscular endurance in resistance-trained individuals. Methods: Thirty-two resistance-trained participants (16 women, 16 men; 23 ± 4 years) completed a randomized, counterbalanced crossover study involving two conditions: sleeping for 8 h at home or in the laboratory. The following morning, participants performed bench press and back squat strength tests across 25-90%1RM, followed by muscular endurance tests to failure at 65%1RM.

Official title: The First-Night Effect: Sex Differences in the Impact of Unfamiliar Sleeping Environment on Strength and Muscular Endurance Performance in Resistance-trained Participants

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