The effect of moderate-intensity exercise on nightly variability in objectively measured sleep parameters among older women.
Behav Sleep Med
; 17(4): 459-469, 2019.
Article
em En
| MEDLINE
| ID: mdl-29053410
ABSTRACT
Objective/Background:
Exercise training has been demonstrated to beneficially influence mean-level measures of sleep; however, few studies have examined the impact of an exercise intervention on night-to-night variability in sleep. This study investigated whether four months of moderate-intensity exercise impacted night-to-night variability in sleep among older women.Methods:
Participants (n = 49) were randomized to one of two moderate-intensity walking programs with different doses of energy expenditure low-dose (n = 23 8 kcal/kg of body weight per week) or high-dose (n = 26 14 kcal/kg of body weight per week). Sleep parameters were assessed objectively via actigraphy at baseline, mid- (2 months), and postintervention (4 months). Nightly variability in each of the sleep parameters was calculated using the seven-day standard deviation (SD) and a coefficient of variation (SD/mean x 100%). Cardiorespiratory fitness (VO2peak) was measured at baseline and postintervention using a graded treadmill test.Results:
Both measures of nightly variability demonstrated a borderline to significantly lower amount of night-to-night variability in wake time after sleep onset (WASO) and number of awakenings at postintervention in comparison to baseline (p ≤ 0.05). Higher VO2peak levels at baseline were associated with less time in bed and lower total sleep time variability throughout the exercise intervention (p < 0.05).Conclusion:
Overall, participation in moderate-intensity exercise was observed to reduce the amount of nightly variability for WASO and number of awakenings over time in older women.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Sono
/
Exercício Físico
Tipo de estudo:
Clinical_trials
Limite:
Aged
/
Female
/
Humans
/
Middle aged
Idioma:
En
Ano de publicação:
2019
Tipo de documento:
Article