Tags

Type your tag names separated by a space and hit enter

A worksite program for overweight middle-aged men achieves lesser weight loss with exercise than with dietary change.
J Am Diet Assoc. 1997 Jan; 97(1):37-42.JA

Abstract

OBJECTIVE

To compare changes in total and regional body composition using dual energy X-ray absorptiometry (DEXA) after subjects lost weight through change in diet or exercise.

DESIGN

A 12-month, randomized, controlled study of two weight-loss interventions-low-fat diet ad libitum or moderate, unsupervised exercise-in free-living, middle-aged men. Compliance was determined at monthly measurement sessions through food records and activity logs; DEXA scans were performed every 3 months.

SUBJECTS/SETTING

Fifty-eight overweight men (mean body mass index = 29.0 +/- 2.6; mean age = 43.4 +/- 5.7 years) recruited from a national corporation were assigned randomly to diet, exercise, or control groups.

INTERVENTIONS

One group reduced dietary fat to 26.4% of energy intake but kept activity unchanged; another group self-selected aerobic exercise (three sessions per week at 65% to 75% maximum heart rate) but kept diet unchanged. A control group maintained weight.

MAIN OUTCOME MEASURES

At 12 months, measurements of weight, total and regional fat mass and lean mass, energy intake, and percentage dietary fat; physical activity indexes.

STATISTICAL ANALYSES

Results were analyzed using paired t tests and analysis of variance.

RESULTS

Mean weight loss was 6.4 +/- 3.3 kg in dieters and 2.6 +/- 3.0 kg in exercisers; control subjects maintained weight. DEXA scans revealed that 40% of dieters' weight loss was lean tissue; more than 80% of weight lost by exercisers was fat. Exercisers maintained limb lean tissue and lost fat mass.

CONCLUSIONS

Greater total weight and lean tissue loss occurred when subjects lost weight through a low-fat diet consumed ad libitum than when subjects participated in unsupervised aerobic exercise. Use of DEXA enabled identification of progressive total and regional changes in fat and lean tissue.

Authors+Show Affiliations

Department of Physiology, Royal Melbourne Hospital, University of Melbourne, Parkville, Australia.No affiliation info availableNo affiliation info available

Pub Type(s)

Clinical Trial
Comparative Study
Journal Article
Randomized Controlled Trial
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

8990415

Citation

Pritchard, J E., et al. "A Worksite Program for Overweight Middle-aged Men Achieves Lesser Weight Loss With Exercise Than With Dietary Change." Journal of the American Dietetic Association, vol. 97, no. 1, 1997, pp. 37-42.
Pritchard JE, Nowson CA, Wark JD. A worksite program for overweight middle-aged men achieves lesser weight loss with exercise than with dietary change. J Am Diet Assoc. 1997;97(1):37-42.
Pritchard, J. E., Nowson, C. A., & Wark, J. D. (1997). A worksite program for overweight middle-aged men achieves lesser weight loss with exercise than with dietary change. Journal of the American Dietetic Association, 97(1), 37-42.
Pritchard JE, Nowson CA, Wark JD. A Worksite Program for Overweight Middle-aged Men Achieves Lesser Weight Loss With Exercise Than With Dietary Change. J Am Diet Assoc. 1997;97(1):37-42. PubMed PMID: 8990415.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - A worksite program for overweight middle-aged men achieves lesser weight loss with exercise than with dietary change. AU - Pritchard,J E, AU - Nowson,C A, AU - Wark,J D, PY - 1997/1/1/pubmed PY - 1997/1/1/medline PY - 1997/1/1/entrez SP - 37 EP - 42 JF - Journal of the American Dietetic Association JO - J Am Diet Assoc VL - 97 IS - 1 N2 - OBJECTIVE: To compare changes in total and regional body composition using dual energy X-ray absorptiometry (DEXA) after subjects lost weight through change in diet or exercise. DESIGN: A 12-month, randomized, controlled study of two weight-loss interventions-low-fat diet ad libitum or moderate, unsupervised exercise-in free-living, middle-aged men. Compliance was determined at monthly measurement sessions through food records and activity logs; DEXA scans were performed every 3 months. SUBJECTS/SETTING: Fifty-eight overweight men (mean body mass index = 29.0 +/- 2.6; mean age = 43.4 +/- 5.7 years) recruited from a national corporation were assigned randomly to diet, exercise, or control groups. INTERVENTIONS: One group reduced dietary fat to 26.4% of energy intake but kept activity unchanged; another group self-selected aerobic exercise (three sessions per week at 65% to 75% maximum heart rate) but kept diet unchanged. A control group maintained weight. MAIN OUTCOME MEASURES: At 12 months, measurements of weight, total and regional fat mass and lean mass, energy intake, and percentage dietary fat; physical activity indexes. STATISTICAL ANALYSES: Results were analyzed using paired t tests and analysis of variance. RESULTS: Mean weight loss was 6.4 +/- 3.3 kg in dieters and 2.6 +/- 3.0 kg in exercisers; control subjects maintained weight. DEXA scans revealed that 40% of dieters' weight loss was lean tissue; more than 80% of weight lost by exercisers was fat. Exercisers maintained limb lean tissue and lost fat mass. CONCLUSIONS: Greater total weight and lean tissue loss occurred when subjects lost weight through a low-fat diet consumed ad libitum than when subjects participated in unsupervised aerobic exercise. Use of DEXA enabled identification of progressive total and regional changes in fat and lean tissue. SN - 0002-8223 UR - https://www.unboundmedicine.com/medline/citation/8990415/A_worksite_program_for_overweight_middle_aged_men_achieves_lesser_weight_loss_with_exercise_than_with_dietary_change_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0002-8223(97)00015-1 DB - PRIME DP - Unbound Medicine ER -