Melatonin ingestion after exhaustive late-evening exercise improves sleep quality and quantity, and short-term performances in teenage athletes

摘要

The present study aimed to explore the effects of a single 10-mg dose of melatonin (MEL) administration after exhaustive late-evening exercise on sleep quality and quantity, and short-term physical and cognitive performances in healthy teenagers. Ten male adolescent athletes (mean +/- SD, age = 15.4 +/- 0.3 years, body-mass = 60.68 +/- 5.7 kg, height = 167.9 +/- 6.9 cm and BMI = 21.21 +/- 2.5) performed two test sessions separated by at least one week. During each session, participants completed the Yo-Yo intermittent-recovery-test level-1 (YYIRT-1) at similar to 20:00 h. Then, sleep polysomnography was recorded from 22:15min to 07:00h, after a double blind randomized order administration of a single 10-mg tablet of MEL (MEL-10 mg) or Placebo (PLA). The following morning, Hooper wellness index was administered and the participants performed the Choice Reaction Time (CRT) test, the Zazzo test and some short-term physical exercises (YYIRT-1, vertical and horizontal Jumps (VJ; HJ), Hand grip strength (HG), and five-jump test (5-JT)). Evening total distance covered in the YYIRT-1 did not change during the two conditions (p 0.05). Total sleep time (Delta = 24.55mn; p 0.001), sleep efficiency (Delta = 4.47%; p 0.001), stage-3 sleep (N3 sleep) (Delta = 1.73%; p 0.05) and rapid-eye-movement sleep (Delta = 2.15%; p 0.001) were significantly higher with MEL in comparison with PLA. Moreover, sleep-onset-latency (Delta = -8.45mn; p 0.001), total time of nocturnal awakenings after sleep-onset (NA) (Delta = -11 mn; p 0.001), stage-1 sleep (N1 sleep) (Delta = -1.7%; p 0.001) and stage-2 sleep (N2 sleep) (Delta = -1.9%; p 0.05) durations were lower with MEL. The Hooper index showed a better subjective sleep quality, a decrease of the subjective perception of fatigue and a reduced level of muscle soreness with MEL. Moreover, MEL improved speed and performance but not inaccuracy during the Zazzo test. CRT was faster with MEL. Morning YYIRT