Relations of self-regulation and self-efficacy for exercise and eating and BMI change: A field investigation.
OBJECTIVE
This study aimed to assess relations of self-regulatory skill use with self-efficacy for exercise and appropriate eating, and the resulting change in weight associated with participation in a nutrition and exercise treatment supported by cognitive-behavioral methods.


METHODS
Adults with severe obesity (N = 95; mean BMI = 40.5 ± 3.9 kg/m2) participated in a 6-month exercise and nutrition treatment emphasizing self-regulatory skills. Changes in self-regulatory skills usage, self-efficacy, overall mood, and BMI were measured. Relations of changes in self-regulatory skill use and self-efficacy, for both physical activity and appropriate eating, were assessed, as was the possibility of mood change being a mediator of these relationships. Indirect effects of the variables associated with the present treatment on BMI change were then estimated.


RESULTS
For both exercise and appropriate eating, changes in self-regulation were associated with self-efficacy change. Mood change partially mediated the relationship between changes in self-regulation for appropriate eating and self-efficacy for appropriate eating. Self-efficacy changes for physical activity and controlled eating, together, explained a significant portion of the variance in BMI change (R2 = 0.26, p < 0.001). The total indirect effect of the treatment on BMI change was 0.20.


CONCLUSIONS
Findings suggest that training in self-regulation for exercise and eating may benefit self-efficacy and weight-loss outcomes. Thus, these variables should be considered in both the theory and behavioral treatment of obesity.
Annesi
James J
JJ
YMCA of Metropolitan Atlanta, 100 Edgewood Avenue NE, Suite 1100, Atlanta, Georgia, USA. jamesa@ymcaatlanta.org.
Gorjala
Srinivasa
S
Am J Prev Med. 2005 Jul;29(1):10-8
15958246
Psychol Methods. 2002 Jun;7(2):147-77
12090408
Psychol Rep. 2004 Aug;95(1):250-6
15460380
Annu Rev Public Health. 2007;28:413-33
17150029
J Consult Clin Psychol. 1991 Oct;59(5):739-44
1955608
Am J Prev Med. 1998 Nov;15(4):266-97
9838973
Obesity (Silver Spring). 2010 Apr;18(4):725-35
19696752
Obes Res. 2005 Apr;13(4):639-48
15897471
JAMA. 2008 Mar 12;299(10):1139-48
18334689
Health Psychol. 2000 Jan;19(1S):5-16
10709944
Res Q Exerc Sport. 2011 Mar;82(1):99-108
21462690
Int J Behav Nutr Phys Act. 2004 Jul 27;1(1):11
15279674
Res Q Exerc Sport. 1992 Mar;63(1):60-6
1574662
J Pers Soc Psychol. 1986 Dec;51(6):1173-82
3806354
Stat Med. 2006 Jan 30;25(2):223-31
16143992
Am Psychol. 2007 Apr;62(3):220-33
17469900
Exerc Sport Sci Rev. 1997;25:407-52
9213100