Duration-Response of Light-Intensity Physical Activity and Glucose Dynamics in Older Adults.
J Phys Act Health
; 16(1): 37-42, 2019 01 01.
Article
em En
| MEDLINE
| ID: mdl-30526273
ABSTRACT
BACKGROUND:
Older adults spend 30% of their day in light-intensity physical activity (LPA). This study was designed to determine if increasing the proportion of time spent in LPA would affect glucose control.METHODS:
Older adults (N = 9) completed four 3-hour treatment conditions consisting of a seated control and 3 randomized conditions (1) 20% time spent in continuous LPA, 80% seated; (2) 40% time spent in continuous LPA, 60% seated; and (3) 60% time spent in continuous LPA, 40% seated. Energy expenditure was measured continuously, and glucose was measured prior to mixed-meal ingestion and hourly thereafter. Glucose area under the curve was compared between conditions using Friedman test.RESULTS:
There was a significant difference in glucose area under the curve by time spent in LPA (P < .001); specifically, between the seated and 60% LPA (mean difference = 35.0 [24.6] mg/dL, P = .01), seated and 40% LPA (mean difference = 25.2 [11.8] mg/dL, P = .03), seated and 20% LPA (mean difference = 17.8 [22.5] mg/dL, P = .03), 20% LPA and 60% LPA (mean difference = 17.2 [22.5] mg/dL, P = .01), and 40% LPA and 60% LPA (mean difference = 9.8 [7.3] mg/dL, P = .01).CONCLUSION:
These results provide experimental evidence to the importance LPA has on metabolic health. If older adults who already spend, on average, about 3 hours per day in LPA, further increase their LPA, they could see benefit to glucose control.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Glicemia
/
Envelhecimento
/
Exercício Físico
/
Período Pós-Prandial
/
Metabolismo Energético
Tipo de estudo:
Clinical_trials
/
Prognostic_studies
Limite:
Aged
/
Aged80
/
Female
/
Humans
/
Male
Idioma:
En
Revista:
J Phys Act Health
Ano de publicação:
2019
Tipo de documento:
Article