title: Physical activity interventions differentially affect exercise task and barrier self-efficacy: a meta-analysis.
abstract: OBJECTIVE
  Researchers have yet to establish how interventions to increase physical activity influence specific self-efficacy beliefs. The current study sought to quantify the effect of interventions to increase physical activity among healthy adults on exercise task (EXSE) and barrier self-efficacy (BSE) via meta-analysis. Intervention characteristics associated with self-efficacy and physical activity changes were also identified.
  
  
  METHODS
  A systematic database search and manual searches through reference lists of related publications were conducted for articles on randomized, controlled physical activity interventions. Published intervention studies reporting changes in physical activity behavior and either EXSE or BSE in healthy adults were eligible for inclusion.
  
  
  RESULTS
  Of the 1,080 studies identified, 20 were included in the meta-analyses. Interventions had a significant effect of g = 0.208, 95% confidence interval (CI) [0.027, 0.388], p < .05, on EXSE; g = 0.128, 95% CI [0.05, 0.20], p < .05 on BSE; and g = 0.335 95% CI [0.196, 0.475], p < .001, on physical activity. Moderator analyses indicated shorter interventions that did not include structured exercise sessions effectively increased EXSE and physical activity, whereas long interventions improved BSE. Interventions that did not provide support increased BSE and physical activity levels. Further, interventions that did not require the use of daily exercise logs improved EXSE and physical activity behavior.
  
  
  CONCLUSIONS
  Interventions designed to increase physical activity differentially influenced EXSE and BSE. EXSE appeared to play a more significant role during exercise adoption, whereas BSE was involved in the maintenance of exercise behavior. Recommendations are offered for the design of future interventions.
authors: Department of Applied Physiology and Kinesiology.
authors: Torrance J
authors: TJ
authors: Higgins
authors: Department of Clinical & Health Psychology.
authors: Kathryn R
authors: KR
authors: Middleton
authors: Department of Statistic.
authors: Larry
authors: L
authors: Winner
authors: Department of Applied Physiology and Kinesiology.
authors: Christopher M
authors: CM
authors: Janelle
mesh_terms: D015444:Exercise / Q000523:psychology*; D006293:Health Promotion; D006801:Humans; D016032:Randomized Controlled Trials as Topic; D020377:Self Efficacy
references: Exerc Sport Sci Rev. 2000 Apr;28(2):85-8
references: 10902091
references: Am J Health Promot. 2007 Nov-Dec;22(2):83-92
references: 18019884
references: Sports Med. 1996 Nov;22(5):321-31
references: 8923649
references: Psychol Health. 2010 Dec;25(10):1129-45
references: 20309777
references: Am J Public Health. 2011 Apr;101(4):751-8
references: 21330590
references: J Gerontol. 1993 Jul;48(4):P218-24
references: 8315239
references: Br J Health Psychol. 2008 Nov;13(Pt 4):659-81
references: 17925060
references: Am J Health Behav. 2010 Jan-Feb;34(1):60-9
references: 19663753
references: Am J Health Promot. 2011 Jan-Feb;25(3):199-206
references: 21192750
references: Public Health Nurs. 2008 May-Jun;25(3):221-34
references: 18477373
references: Health Educ Res. 2011 Apr;26(2):308-22
references: 21321008
references: Int J Obes (Lond). 2007 Dec;31(12):1786-97
references: 17637702
references: Psychol Rev. 1977 Mar;84(2):191-215
references: 847061
references: AAOHN J. 2006 Jun;54(6):249-61
references: 16800402
references: Control Clin Trials. 1996 Feb;17(1):1-12
references: 8721797
references: Nurs Res. 2008 Jan-Feb;57(1):24-32
references: 18091289
references: Health Educ Res. 2010 Aug;25(4):620-31
references: 19654220
references: J Behav Med. 2009 Jun;32(3):270-7
references: 19156510
references: Ann Behav Med. 2003 Winter;25(1):1-7
references: 12581930
references: J Behav Med. 1992 Feb;15(1):65-88
references: 1583674
references: Psychol Health. 2011 Feb;26(2):151-66
references: 21318927
references: Biometrics. 2000 Jun;56(2):455-63
references: 10877304
references: J Aging Phys Act. 2009 Jan;17(1):1-16
references: 19299835
references: JAMA. 1991 Sep 18;266(11):1535-42
references: 1880885
references: Health Educ Res. 2008 Aug;23(4):583-91
references: 17890759
references: J Community Health. 1991 Feb;16(1):23-36
references: 2010569
references: J Consult Clin Psychol. 1983 Jun;51(3):390-5
references: 6863699
references: Prev Med. 2003 Aug;37(2):110-8
references: 12855210
references: Health Psychol. 2007 Jul;26(4):401-9
references: 17605559
references: Res Q Exerc Sport. 1992 Mar;63(1):60-6
references: 1574662
references: Am J Health Behav. 2010 Nov-Dec;34(6):764-75
references: 20604700
references: Am J Health Behav. 2005 Jul-Aug;29(4):352-9
references: 16006232
references: J Gerontol Nurs. 2002 Jun;28(6):40-9
references: 12071273
references: Am J Public Health. 2009 Feb;99(2):362-8
references: 19059858
references: Sports Med. 2009;39(10):857-88
references: 19757863
references: Health Psychol. 2011 Jan;30(1):75-83
references: 21038962
references: Am J Health Promot. 1998 Jan-Feb;12(3):154-61
references: 10176088
references: Gerontologist. 2008 Jun;48(3):358-67
references: 18591361
references: Prev Med. 1992 Mar;21(2):237-51
references: 1579558
references: Am J Prev Med. 1998 Nov;15(4):266-97
references: 9838973
references: J Behav Med. 1995 Oct;18(5):499-515
references: 8847717
references: JAMA. 1995 Feb 1;273(5):402-7
references: 7823386
references: Annu Rev Nutr. 2000;20:21-44
references: 10940325
references: Percept Mot Skills. 1993 Aug;77(1):115-22
references: 8367228
references: Health Psychol. 2011 Jul;30(4):432-41
references: 21574710
references: Circulation. 1996 Aug 15;94(4):857-62
references: 8772712
references: JAMA. 1999 Jan 27;281(4):327-34
references: 9929085
references: Psychol Bull. 2007 Jul;133(4):673-93
references: 17592961
references: Ann Behav Med. 1998 Summer;20(3):174-80
references: 9989324
references: Am J Prev Med. 2002 Aug;23(2 Suppl):26-35
references: 12133735
references: Ann Behav Med. 2007 Nov-Dec;34(3):323-8
references: 18020942
references: J Behav Med. 1995 Oct;18(5):479-97
references: 8847716
references: Br J Health Psychol. 2010 May;15(Pt 2):265-88
references: 19586583
references: Am J Lifestyle Med. 2011 Jul;5(4):
references: 24353482
references: J Phys Act Health. 2010 May;7(3):299-307
references: 20551485