Effects of high-intensity interval training on cardiometabolic risk in overweight and obese African-American women: a pilot study.
Ethn Health
; 23(7): 752-766, 2018 10.
Article
em En
| MEDLINE
| ID: mdl-28277015
ABSTRACT
OBJECTIVE:
Little is known about high-intensity interval training (HIIT) in African-American (AA) women. The purpose of this pilot study was to evaluate the effects of HIIT and steady-state (SS) exercise on cardiometabolic risk factors in young AA women.DESIGN:
A 16-week exercise intervention was conducted 3x/week. Twenty-seven AA women were randomized to SS (n = 11; 32 continuous minutes of treadmill walking at 60-70% of maximum heart rate (HRmax)), or HIIT (n = 16; 32â min of treadmill HIIT alternating 3â min at 60-70% of HRmax with 1â min at 80-90% of HRmax). Two-way repeated measures ANOVA with intention-to-treat analysis was used to identify changes between groups. Significance was accepted at P ≤ 0.05.RESULTS:
Of the 27 women who entered the study (age 30.5 ± 6.8 years; BMI 35.1 ± 5.1 kg/m2; 5274 ± 1646 baseline steps/day), 14 completed the intervention. HIIT significantly decreased waist circumference (107.0 ± 11.3 to 105.1 ± 11.9 cm) compared to SS, which showed no change. There was a significant time effect for steps where HIIT increased steps/day (5334 ± 1586 to 7604 ± 1817 steps/day), and SS had no change. There were no significant changes in either group for any other measurements.CONCLUSION:
HIIT was more effective at reducing waist circumference and increasing daily steps/day than SS treadmill exercise over 16 weeks. Further research in a larger sample is indicated to evaluate the effects of each protocol on cardiometabolic risk factors.Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Negro ou Afro-Americano
/
Doenças Cardiovasculares
/
Treinamento Intervalado de Alta Intensidade
/
Obesidade
Tipo de estudo:
Clinical_trials
/
Etiology_studies
/
Prognostic_studies
/
Risk_factors_studies
Limite:
Adult
/
Female
/
Humans
Idioma:
En
Ano de publicação:
2018
Tipo de documento:
Article