Efficacy of an individualized, motivationally-tailored physical activity intervention
Abstract
This study compared the efficacy of two low-cost interventions for physical activity adoption. Sedentary (N = 194) adults recruited through newspaper advertisements were randomized to receive either a motivationally-matched, individually-tailored intervention (IT) or a standard self-help intervention (ST). Assessments and interventions were delivered by repeated mailings at baseline, one, three, and six months. Participants were assessed regarding current physical activity behavior, motivational readiness to adopt regular physical activity, and psychological constructs associated with physical activity participation (e.g. self-efficacy, decisional balance). Repeated measures analyses of variance (ANOVAs) revealed significant increases in physical activity participation between baseline and six months for both groups with a significantly greater increase among IT participants. The IT group outperformed the ST group on all primary outcome measures: (a) minutes of physical activity per week, (b) reaching Centers for Disease Control and American College of Sports Medicine (CDC/ACSM) recommended minimum physical activity criteria, and (c) achieving the Action stage of motivational readiness for physical activity adoption. Both groups showed significant improvement between baseline and six months on the psychological constructs associated with physical activity adoption (e.g. self-efficacy), with no significant differences observed between the treatment groups. Utilizing computer expert systems and self-help manuals to provide individually-tailored, motivationally-matched interventions appears to be an effective, low-cost approach for enhancing physical activity participation in the community.
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In a study comparing nonindividualized self-help manuals versus motivationally matched reports and manuals to promote physical activity adoption, both groups showed significant improvement in physical activity at 6 months, but the increase was 50% greater among participants receiving motivationally matched materials.
“In contrast, in a study comparing the efficacy of nonindividualized self-help manuals versus motivationally matched reports and manuals to promote PA adoption, both groups showed significant improvement in PA at 6 months, but the increase was 50% greater among participants receiving motivationally matched materials.79”
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Cites
(1985) · Medical Entomology and Zoology · Cited by 19,180 · see citing works
Stages and processes of self-change of smoking: Toward an integrative model of change.
Prochaska, J. O., & DiClemente, C. C. (1983) · Journal of Consulting and Clinical Psychology · doi:10.1037/0022-006x.51.3.390 · Cited by 9,098 · see citing works
Physical Activity and Health: A Report of the Surgeon General
(1995) · PsycEXTRA Dataset · doi:10.1037/e525162010-001 · Cited by 5,488 · see citing works
Decision making: A psychological analysis of conflict, choice, and commitment
(1978) · Evaluation and Program Planning · doi:10.1016/0149-7189(78)90042-3 · Cited by 3,954 · see citing works
The Journal of Family Practice
Geyman, J. P. (1997) · American Journal of Family Therapy · doi:10.1080/01926189708251066 · Cited by 3,088 · see citing works
DiClemente, C. C., Prochaska, J. O., Fairhurst, S., Velicer, W. F., Velasquez, M. M., & Rossi, J. S. (1991) · Journal of Consulting and Clinical Psychology · doi:10.1037//0022-006x.59.2.295 · Cited by 2,402 · see citing works
Bandura, A. (2008) · The International Encyclopedia of Communication · doi:10.1002/9781405186407.wbiecs053 · Cited by 1,902 · see citing works
Self-Efficacy and the Stages of Exercise Behavior Change
Marcus, B. H., Selby, V. C., NIAURA, R. S., & Rossi, J. S. (1992) · Research Quarterly for Exercise and Sport · doi:10.1080/02701367.1992.10607557 · Cited by 1,861 · see citing works
Self-citationDiClemente, C. C., Prochaska, J. O., Fairhurst, S., et al. (1991) · Journal of Consulting and Clinical Psychology · doi:10.1037/0022-006x.59.2.295 · Cited by 1,838 · see citing works
PHYSICAL ACTIVITY ASSESSMENT METHODOLOGY IN THE FIVE-CITY PROJECT1
SALLIS, J. F., HASKELL, W. L., WOOD, P. D., FORTMANN, S. P., ROGERS, T., BLAIR, S. N., & PAFFENBARGER, R. S. (1985) · American Journal of Epidemiology · doi:10.1093/oxfordjournals.aje.a113987 · Cited by 1,716 · see citing works
A simultaneous evaluation of 10 commonly used physical activity questionnaires
Jacobs, D. R., Ainsworth, B. E., Hartman, T. J., & Leon, A. S. (1993) · Medicine & Science in Sports & Exercise · doi:10.1249/00005768-199301000-00012 · Cited by 1,677 · see citing works
BLAIR, S. N., HASKELL, W. L., HO, P., PAFFENBARGER, R. S., VRANIZAN, K. M., FARQUHAR, J. W., & WOOD, P. D. (1985) · American Journal of Epidemiology · doi:10.1093/oxfordjournals.aje.a114163 · Cited by 1,104 · see citing works
The stages and processes of exercise adoption and maintenance in a worksite sample.
Marcus, B. H., Rossi, J. S., Selby, V. C., NIAURA, R. S., & Abrams, D. B. (1992) · Health Psychology · doi:10.1037/0278-6133.11.6.386 · Cited by 798 · see citing works
Self-citationProchaska, J. O., DiClemente, C. C., Velicer, W. F., & Rossi, J. S. (1993) · Health Psychology · doi:10.1037//0278-6133.12.5.399 · Cited by 760 · see citing works
Physical activity, fitness, and health: international proceedings and consensus statement
(1994) · Choice Reviews Online · doi:10.5860/choice.32-0972 · Cited by 739 · see citing works
Assessing motivational readiness and decision making for exercise.
Marcus, B. H., Rakowski, W., & Rossi, J. S. (1992) · Health Psychology · doi:10.1037//0278-6133.11.4.257 · Cited by 676 · see citing works
Self-citationProchaska, J. O., DiClemente, C. C., Velicer, W. F., & Rossi, J. S. (1993) · Health Psychology · doi:10.1037/0278-6133.12.5.399 · Cited by 621 · see citing works
Assessment of physical activity in epidemiologic research: problems and prospects.
LaPorte, R. E., Montoye, H. J., & Caspersen, C. J. (1985) · Europe PMC (PubMed Central) · Cited by 587 · see citing works
Assessing motivational readiness and decision making for exercise.
Marcus, B. H., Rakowski, W., & Rossi, J. S. (1992) · Health Psychology · doi:10.1037/0278-6133.11.4.257 · Cited by 498 · see citing works
Self-citationMarcus, B. H., Banspach, S. W., Lefebvre, R. C., Rossi, J. S., Carleton, R. A., & Abrams, D. B. (1992) · American Journal of Health Promotion · doi:10.4278/0890-1171-6.6.424 · Cited by 470 · see citing works
Self-citationCompliance/adherence in health-related exercise.
Dishman, R. K. (1982) · Health Psychology · doi:10.1037/0278-6133.1.3.237 · Cited by 426 · see citing works
A multivariate study of determinants of vigorous exercise in a community sample
Sallis, J. F., Hovell, M. F., Hofstetter, C. R., Faucher, P., Elder, J. P., Blanchard, J. H., Caspersen, C. J., Powell, K. E., & Christenson, G. M. (1989) · Preventive Medicine · doi:10.1016/0091-7435(89)90051-0 · Cited by 419 · see citing works
The stages of exercise behavior.
Marcus, B. H., & Simkin, L. R. (1993) · PubMed · Cited by 418 · see citing works
Self-citationThe effects of computer-tailored smoking cessation messages in family practice settings.
Strecher, V. J., Kreuter, M. W., den Boer, D.-J., Kobrin, S. C., Hospers, H. J., & Skinner, C. S. (1994) · PubMed · Cited by 417 · see citing works
A report of the Surgeon General. Physical activity and health. At-A-Glance.
(1996) · PsycEXTRA Dataset · doi:10.1037/e305372003-001 · Cited by 319 · see citing works
Marcus, B. H., Emmons, K. M., Simkin‐Silverman, L. R., Linnan, L. A., Taylor, E. R., Bock, B. C., Roberts, M. B., Rossi, J. S., & Abrams, D. B. (1998) · American Journal of Health Promotion · doi:10.4278/0890-1171-12.4.246 · Cited by 317 · see citing works
Self-citationIncreasing and maintaining exercise and physical activity
Dishman, R. K. (1991) · Behavior Therapy · doi:10.1016/s0005-7894(05)80371-5 · Cited by 277 · see citing works
Reduction in Cardiovascular Disease Risk Factors: 6-Month Results from ProjectActive
Dunn, A. L., Marcus, B. H., Kampert, J. B., Garcia, M. E., Kohl, H. W., & Blair, S. N. (1997) · Preventive Medicine · doi:10.1006/pmed.1997.0218 · Cited by 262 · see citing works
Self-citationExercise applications and promotion in behavioral medicine: Current status and future directions.
Martin, J. E., & Dubbert, P. M. (1982) · Journal of Consulting and Clinical Psychology · doi:10.1037//0022-006x.50.6.1004 · Cited by 218 · see citing works
Reliability and concurrent validity for a 7-d re-call of physical activity in college students
Dishman, R. K., & Steinhardt, M. A. (1988) · Medicine & Science in Sports & Exercise · doi:10.1249/00005768-198802000-00003 · Cited by 185 · see citing works
Behavioral control of exercise in sedentary adults: Studies 1 through 6.
Martin, J. E., Dubbert, P. M., Katell, A. D., Thompson, J. K., Raczynski, J. R., Lake, M., Smith, P. O., Webster, J. S., Sikora, T. L., & Cohen, R. E. (1984) · Journal of Consulting and Clinical Psychology · doi:10.1037/0022-006x.52.5.795 · Cited by 181 · see citing works
Exercise applications and promotion in behavioral medicine: Current status and future directions.
Martin, J. E., & Dubbert, P. M. (1982) · Journal of Consulting and Clinical Psychology · doi:10.1037/0022-006x.50.6.1004 · Cited by 172 · see citing works
Blair, S. N., Powell, K. E., Bazzarre, T. L., Early, J. L., Epstein, L. H., Green, L. W., Harris, S. S., Haskell, W. L., King, A. C., & Koplan, J. P. (1993) · Circulation · doi:10.1161/01.cir.88.3.1402 · Cited by 68 · see citing works
Whether obesity should be treated.
Brownell, K. D. (1993) · Health Psychology · doi:10.1037//0278-6133.12.5.339 · Cited by 46 · see citing works
Flagged first, then by citations
Research works printed but not linked: 3
- Blair SN, Powell KE, Bazzarre TL, et al: Physical inactivity, Workshop V. Circulation. 1993, 88:1402-1405.
- Marcus BH, Emmons KM, Simkin-Silverman LR, et al: Evaluation of stage-matched versus standard self-help physical activity interven- tions at the workplace. American Journal of Health Promotion. 1998, 12(4):246-253.
- Dunn AL, Marcus BH, Kampert JB, et al: Reduction in cardiovascu- lar disease risk factors: Six-month results from Project Active. Preventive Medicine. 1997, 26:883-892.
Cited by
Sorted by citations
Glanz, K., & Bishop, D. B. (2010) · Annual Review of Public Health · doi:10.1146/annurev.publhealth.012809.103604 · Cited by 2,336 · see citing works
Does tailoring matter? Meta-analytic review of tailored print health behavior change interventions
Noar, S. M., Benac, C. N., & Harris, M. S. (2007) · Psychological Bulletin · doi:10.1037/0033-2909.133.4.673 · Cited by 2,136 · see citing works
Physical activity, exercise, depression and anxiety disorders
Ströhle, A. (2009) · Journal of Neural Transmission · doi:10.1007/s00702-008-0092-x · Cited by 1,269 · see citing works
Using Internet technology to deliver a behavioral weight loss program
Tate, D. F. (2001) · JAMA · doi:10.1001/jama.285.9.1172 · Cited by 925 · see citing works
Artinian, N. T., Fletcher, G. F., Mozaffarian, D., Kris-Etherton, P., Van Horn, L., Lichtenstein, A. H., Kumanyika, S., Kraus, W. E., Fleg, J. L., Redeker, N. S., et al. (2010) · Circulation · doi:10.1161/cir.0b013e3181e8edf1 · Cited by 919 · see citing works
A meta-analysis of computer-tailored interventions for health behavior change
Krebs, P., Prochaska, J. O., & Rossi, J. S. (2010) · Preventive Medicine · doi:10.1016/j.ypmed.2010.06.004 · Cited by 854 · see citing works
Williams, S. L., & French, D. P. (2011) · Health Education Research · doi:10.1093/her/cyr005 · Cited by 690 · see citing works
Ashford, S., Edmunds, J., & French, D. P. (2010) · British Journal of Health Psychology · doi:10.1348/135910709x461752 · Cited by 673 · see citing works
Interventions for promoting physical activity
Foster, C., Hillsdon, M., Thorogood, M., Kaur, A., & Wedatilake, T. (2005) · Cochrane Database of Systematic Reviews · doi:10.1002/14651858.cd003180.pub2 · Cited by 692 · see citing works
Kroeze, W., Werkman, A., & Brug, J. (2006) · Annals of Behavioral Medicine · doi:10.1207/s15324796abm3103_2 · Cited by 570 · see citing works
Marcus, B. H., Williams, D. M., Dubbert, P. M., Sallis, J. F., King, A. C., Yancey, A. K., Franklin, B. A., Buchner, D., Daniels, S. R., & Claytor, R. P. (2006) · Circulation · doi:10.1161/circulationaha.106.179683 · Cited by 558 · see citing works
Self-citationPsychosocial mediators of physical activity behavior among adults and children
Lewis, B. A., Marcus, B. H., Pate, R. R., & Dunn, A. L. (2002) · American Journal of Preventive Medicine · doi:10.1016/s0749-3797(02)00471-3 · Cited by 363 · see citing works
Self-citationPhysical activity interventions using mass media, print media, and information technology
Marcus, B., Owen, N., Forsyth, L., Cavill, N., & Fridinger, F. (1998) · American Journal of Preventive Medicine · doi:10.1016/s0749-3797(98)00079-8 · Cited by 333 · see citing works
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Jayakody, K., Gunadasa, S., & Hosker, C. (2014) · British Journal of Sports Medicine · doi:10.1136/bjsports-2012-091287 · Cited by 310 · see citing works
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Ryan, P., & Lauver, D. R. (2002) · Journal of Nursing Scholarship · doi:10.1111/j.1547-5069.2002.00331.x · Cited by 230 · see citing works
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Marcus, B. H. (2007) · Archives of Internal Medicine · doi:10.1001/archinte.167.9.944 · Cited by 216 · see citing works
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Self-citationRevere, D., & Dunbar, P. J. (2001) · Journal of the American Medical Informatics Association · doi:10.1136/jamia.2001.0080062 · Cited by 208 · see citing works
Marcus, B. H., Napolitano, M. A., King, A. C., Lewis, B. A., Whiteley, J. A., Albrecht, A., Parisi, A., Bock, B., Pinto, B., Sciamanna, C., et al. (2007) · Health Psychology · doi:10.1037/0278-6133.26.4.401 · Cited by 194 · see citing works
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Marcus, B. (2000) · American Journal of Preventive Medicine · doi:10.1016/s0749-3797(00)00186-0 · Cited by 170 · see citing works
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PINTO, B., GOLDSTEIN, M., ASHBA, J., SCIAMANNA, C., & JETTE, A. (2005) · American Journal of Preventive Medicine · doi:10.1016/j.amepre.2005.06.016 · Cited by 146 · see citing works
Self-citationAnderson, E. S., Winett, R. A., Wojcik, J. R., Winett, S. G., & Bowden, T. (2001) · Annals of Behavioral Medicine · doi:10.1207/s15324796abm2302_3 · Cited by 138 · see citing works
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Dutton, G. R., Tan, F., Provost, B. C., Sorenson, J. L., Allen, B., & Smith, D. (2009) · Journal of Behavioral Medicine · doi:10.1007/s10865-009-9200-0 · Cited by 111 · see citing works
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Self-citationHageman, P. A., Walker, S. N., & Pullen, C. H. (2005) · Journal of Geriatric Physical Therapy · doi:10.1519/00139143-200504000-00005 · Cited by 79 · see citing works
Eakin, E. G., Reeves, M. M., Lawler, S. P., Oldenburg, B., Del Mar, C., Wilkie, K., Spencer, A., Battistutta, D., & Graves, N. (2008) · Contemporary Clinical Trials · doi:10.1016/j.cct.2007.10.005 · Cited by 70 · see citing works
Ang, D. C., Kaleth, A. S., Bigatti, S., Mazzuca, S., Saha, C., Hilligoss, J., Lengerich, M., & Bandy, R. (2011) · Contemporary Clinical Trials · doi:10.1016/j.cct.2010.08.014 · Cited by 51 · see citing works
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Jacobs, A. D., Ammerman, A. S., Ennett, S. T., Campbell, M. K., Tawney, K. W., Aytur, S. A., Marshall, S. W., Will, J. C., & Rosamond, W. D. (2004) · Journal of Women's Health · doi:10.1089/1540999041281016 · Cited by 54 · see citing works
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Yardley, L., & Nyman, S. R. (2007) · Health Promotion International · doi:10.1093/heapro/dam007 · Cited by 48 · see citing works
Trial of print and telephone delivered interventions to influence walking
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Effectiveness of lifestyle physical activity interventions to reduce cardiovascular disease
Dunn, A. L. (2009) · American Journal of Lifestyle Medicine · doi:10.1177/1559827609336067 · Cited by 37 · see citing works
- Authors
- Marcus, B. H., Bock, B. C., Pinto, B. M., Forsyth, L. A. H., Roberts, M. B., & Traficante, R. M.
- Affiliations
- Brown University (US)
- Corresponding author
- Marcus, Bess H.
- Venue
- Annals of Behavioral Medicine
- Publisher
- Oxford University Press (OUP)
- Published
- 1998-09
- Volume
- 20
- Issue
- 3
- Pages
- 174-180
- ISSN
- 0742-5554 (ISSN-L)
- 0883-6612
- 1532-4796
- OpenAlex
- W2001750663
- Cited by
- 407
- References
- 35
- Citations by year
- 2026: 5 · 2025: 4 · 2024: 2 · 2023: 10 · 2022: 4 · 2021: 11 · 2020: 5 · 2019: 4 · 2018: 5 · 2017: 17 · 2016: 13 · 2015: 11 · 2014: 25 · 2013: 17 · 2012: 13
- FWCI
- 6.97
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Annals of Behavioral Medicine (publishedVersion)
- PubMed (publishedVersion)
- Funders
- National Institutes of Health (5r29ca059660-05, 5k07ca001757-04)
- National Cancer Institute (R29CA 59660, KO7CAO1757)
- Topics
- Health Sciences › Medicine › Physiology › Physical Activity and Health
- Social Sciences › Psychology › Applied Psychology › Behavioral Health and Interventions
- Social Sciences › Psychology › Social Psychology › Motivation and Self-Concept in Sports
- Keywords
- physical activity adoption, personalized interventions, self-help intervention, sedentary adults, self-efficacy, decisional balance, motivational readiness, low-cost interventions
- MeSH terms
- Adult, Female, Humans, Male, Motivation, Motor Activity, Surveys and Questionnaires, Social Support, Time Factors
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