Moderate exercise and bright light treatment in overweight and obese individuals

Andrea Dunai, M. Novák, Sharon A. Chung, Leonid Kayumov, Andras Keszei, Robert Levitan, Colin M. Shapiro

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

Objective: Increased physical activity is important given the concern over the growing rates of obesity. The aim of this study is to conduct a controlled investigation of the effects of bright light therapy and exercise on weight loss and body composition in overweight and obese individuals. Research Methods and Procedures: Twenty-five over-weight and obese subjects were assigned to 6 weeks of moderate exercise with or without bright light treatment. Outcome measure included changes in body mass and body composition and ratings of mood, seasonality, and sleep. Results: Body weight decreased significantly with exercise in subjects in the light and non-light treatment groups, but the change was not significantly different between the groups. Similar results were found for BMI. With exercise, body fat decreased significantly only in the light treatment group. There was a significant effect of the interaction of group by time on body fat composition, but the group by time interaction failed to reach statistical significance for body weight and BMI. Mood scores improved significantly with exercise in the light group, but no significant changes were noted regarding sleep. Discussion: This preliminary study is the first to show that addition of bright light treatment to a 6-week moderate exercise program can alter body composition by significantly reducing body fat. The reduction in body fat mass is of particular importance, because visceral fat has been particularly implicated as a major factor in the development of the metabolic syndrome. This study is an important step toward finding ways to maximize the effects of exercise.

Original languageEnglish
Pages (from-to)1749-1757
Number of pages9
JournalObesity
Volume15
Issue number7
DOIs
Publication statusPublished - Jul 2007

Fingerprint

Body Composition
Adipose Tissue
Light
Sleep
Body Weight
Therapeutics
Phototherapy
Intra-Abdominal Fat
Weight Loss
Obesity
Outcome Assessment (Health Care)
Weights and Measures
Research

Keywords

  • Body composition
  • Exercise
  • Overweight

ASJC Scopus subject areas

  • Endocrinology
  • Medicine (miscellaneous)
  • Endocrinology, Diabetes and Metabolism
  • Nutrition and Dietetics

Cite this

Dunai, A., Novák, M., Chung, S. A., Kayumov, L., Keszei, A., Levitan, R., & Shapiro, C. M. (2007). Moderate exercise and bright light treatment in overweight and obese individuals. Obesity, 15(7), 1749-1757. https://doi.org/10.1038/oby.2007.208

Moderate exercise and bright light treatment in overweight and obese individuals. / Dunai, Andrea; Novák, M.; Chung, Sharon A.; Kayumov, Leonid; Keszei, Andras; Levitan, Robert; Shapiro, Colin M.

In: Obesity, Vol. 15, No. 7, 07.2007, p. 1749-1757.

Research output: Contribution to journalArticle

Dunai, A, Novák, M, Chung, SA, Kayumov, L, Keszei, A, Levitan, R & Shapiro, CM 2007, 'Moderate exercise and bright light treatment in overweight and obese individuals', Obesity, vol. 15, no. 7, pp. 1749-1757. https://doi.org/10.1038/oby.2007.208
Dunai, Andrea ; Novák, M. ; Chung, Sharon A. ; Kayumov, Leonid ; Keszei, Andras ; Levitan, Robert ; Shapiro, Colin M. / Moderate exercise and bright light treatment in overweight and obese individuals. In: Obesity. 2007 ; Vol. 15, No. 7. pp. 1749-1757.
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