Separate Effects of Exercise Amount and Intensity on Adipose Tissue and Skeletal Muscle Mass in Adults with Abdominal Obesity.

Autor: Cowan TE; School of Kinesiology and Health Studies, Queen's University, Kingston, Ontario, Canada., Brennan AM; School of Kinesiology and Health Studies, Queen's University, Kingston, Ontario, Canada., Stotz PJ; School of Kinesiology and Health Studies, Queen's University, Kingston, Ontario, Canada., Clarke J; School of Kinesiology and Health Studies, Queen's University, Kingston, Ontario, Canada., Lamarche B; Institute of Nutraceuticals and Functional Foods, Laval University, Quebec City, Quebec, Canada., Ross R; School of Kinesiology and Health Studies, Queen's University, Kingston, Ontario, Canada.; School of Medicine, Division of Endocrinology and Metabolism, Queen's University, Kingston, Ontario, Canada.
Jazyk: angličtina
Zdroj: Obesity (Silver Spring, Md.) [Obesity (Silver Spring)] 2018 Nov; Vol. 26 (11), pp. 1696-1703. Date of Electronic Publication: 2018 Sep 27.
DOI: 10.1002/oby.22304
Abstrakt: Objective: To determine the effects of exercise amount (kilocalories per session) and intensity (percent of maximal oxygen consumption [% VO 2 peak]) on adipose tissue (AT) and skeletal muscle (SM) in adults with abdominal obesity.
Methods: Participants (n = 103; 52.7 ± 7.6 years) were randomized to the following groups: control; low-amount, low-intensity exercise (180 kcal/session [women] and 300 kcal/session [men] at 50% VO 2 peak); high-amount, low-intensity exercise (HALI; 360 kcal/session [women] and 600 kcal/session [men] at 50% VO 2 peak); or high-amount, high-intensity exercise (HAHI; 360 kcal/session [women] and 600 kcal/session [men] at 75% VO 2 peak) for 24 weeks. Activities of daily living were measured by accelerometry. Magnetic resonance imaging was used to measure tissue mass.
Results: Reduction in all AT depots was greater in the exercise groups compared with control (P < 0.002); however, there were no differences between exercise groups (P > 0.05). Visceral and abdominal subcutaneous AT reduction was uniform across the abdomen. Total SM mass did not change with exercise compared with control (P = 0.32). However, while lower-body SM mass was maintained (P = 0.32), upper-body SM mass in the high-amount, high-intensity and the high-amount, low-intensity groups was reduced compared with controls (P < 0.008).
Conclusions: In adults with abdominal obesity, substantial reductions in total, abdominal subcutaneous, and visceral AT with a preservation of total SM mass were observed independent of exercise amount or intensity.
(© 2018 The Obesity Society.)
Databáze: MEDLINE
Externí odkaz: