Journal of Sports Science and Medicine
Journal of Sports Science and Medicine
ISSN: 1303 - 2968   
Ios-APP Journal of Sports Science and Medicine
Androit-APP Journal of Sports Science and Medicine
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©Journal of Sports Science and Medicine ( 2016 ) 15 , 358 - 364

Research article
The Effects of Two Self-Regulation Interventions to Increase Self-Efficacy and Group Exercise Behavior in Fitness Clubs
Jan Middelkamp1, , Maaike van Rooijen2, Peter Wolfhagen3, Bert Steenbergen4,5
Author Information
1 Radboud University, Behavioural Science Institute, Nijmegen, The Netherlands
2 University of Groningen, The Netherlands
3 ActivityWorkx for you, Zevenaar, The Netherlands
4 Radboud University, Nijmegen, The Netherlands
5 The Australian Catholic University, Melbourne, Australia

Jan Middelkamp
‚úČ Montessorilaan 3, Postbox 9104, 6500 HE, Nijmegen, The Netherlands
Email: jan@hddgroup.com
Publish Date
Received: 08-02-2016
Accepted: 26-04-2016
Published (online): 23-05-2016
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ABSTRACT

Studies on the adoption and maintenance of group exercise behavior are scarce. The objective of this study is to test two self-efficacy based interventions to increase barrier self-efficacy and group exercise behavior. In total 122 participants (Mage 42.02 yr.; SD 12.29; 67% females) were recruited and randomly assigned to one control and two experimental groups. The control group was limited to participate in one virtual group exercise program only (group 1). The first experimental group was able to self-set their activities and participate in multiple group exercise programs (group 2). The second experimental group received an additional monthly coaching protocol to manage self-set goals (group 3). A validated scale for barrier self-efficacy was used, group exercise sessions were measured and drop-out rates were registered. An ANOVA indicated that mean amount of sessions of group 1 and 3, and 2 and 3 differed significantly (p < 0.05) in 12 weeks. Descriptive statistics demonstrate mean group exercise sessions over the total of 12 weeks of 2.74 (SD 4.65) in the control group; 4.75 (SD 6.08) in the first experimental group, and 12.25 (SD 9.07) for the second experimental group. Regression analysis indicated that self-efficacy at 8-weeks explained the highest variance in overall group exercise sessions (R2 = 0.18; p < 0.05). Overall drop-out rates were 88% in group 1, 78% in group 2 and 48% in group 3. The results showed that group exercise behavior can significantly be improved by a coaching protocol on self-set goals. Future research should address the effectiveness of self-set activities and self-set goals for a longer period of time and in other types of exercise programs.

Key words: Fitness, adoption, maintenance, adherence, drop-out


           Key Points
  • Approximately 144 million individuals exercise in fitness clubs worldwide.
  • About 50% participate in at least one group exercise program and 23% participate only in group exercise classes with instructor.
  • Research on attendance and exercise behavior in fitness clubs is limited but there are strong indications that the frequencies are low.
  • This study demonstrates that group exercise behavior in fitness clubs can be improved significantly by a coaching protocol on self-set goals based on tenets of self-efficacy theory.
 
 
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