Chandrashekhar Y, Anand IS. Exercise as a coronary protective factor. Am Heart J. Dec 1991;122(6):1723–39.
Jennings GL, Deakin G, Dewar E, Jaufer E, Nelson LS. Exercise, cardiovascular disease and blood pressure. Clin Exp Hypertens. 1989;11:1035–52.
Lee IM. Physical activity, fitness, and cancer. In: Boucher C, Shephard RJ, Stephens T, eds. Physical activity, fitness, and health: International proceedings and consensus statement. Champaign, IL: Human Kinetics; 1994:814–31.
Warburton DE, Nicol CW, Bredin SS. Prescribing exercise as preventive therapy. CMAJ. Mar 28 2006;174(7):961–74.
Smith SC, Blair SN, Criqui MH, Fletcher GF, Fuster V, Gersh BJ, et al. Preventing heart attack and death in patients with coronary disease. J Am Coll Cardiol. Jul 1995;26(1):292–4.
Hardy CJ, Rejeski WJ. Not what, but how one feels: The measurement of affect during exercise. J Sport Exerc Psychol. 1989;11:304–17.
McAuley E, Courneya KS. Adherence to exercise and physical actiity as health-promoting behaviors: Attitudinal and self-efficacy influences. Applied and Preventive Psychology. 1993;2:65–77.
Carron AV, Hausenblas HA, Mack D. Social influence and exercise: A meta-analysis. J Sport Exerc Psychol. 1996;18:1–16.
Dishman RK, Buckworth J. Increasing physical activity: A quantitative synthesis. Med Sci Sports Exerc. Jun 1996;28(6):706–19.
Bain LL, Wilson T, Chaikind E. Participant perceptions of exercise programs for overweight women. Res Q Exerc Sport. 1989;60:134–43.
Baron RS, Kerr NL. Group process, group decision, group action. 2nd ed. Buckingham, UK: Open University Press; 2003.
Karau SJ, Williams KD. Social loafing: A meta-analytic review and theoretical integration. J Pers Soc Psychol. 1993;65:681–706.
Kerr NL, Hertel G. The Köhler group motivation gain: How to motivate the "weak links" in a group. Soc Pers Psychol Comp. January 2010;5(1):43–55.
Weber B, Hertel G. Motivation gains of inferior group members: A meta-analytical review. J Pers Soc Psychol. 2007;93(6):973–93.
Steiner ID. Group process and productivity. New York: Academic Press; 1972.
Stroebe W, Diehl M, Abakoumkin G. Social compensation and the Köhler effect: Toward a theoretical explanation of motivation gains in group productivity. Mahwah, NJ: Lawrence Erlbaum; 1996. Witte E, Davis J, eds. Understanding group behavior: Consensual action by small groups; No. 2.
Kerr NL, Messé LA, Seok DH, Sambolec EJ, Lount Jr. RB, Park ES. Psychological mechanisms underlying the Köhler motivation gain. Pers Soc Psychol B. 2007;33(6):828–41.
Feltz DL, Kerr NL, Irwin BC. Buddy up: The Köhler effect applied to health games. J Sport Exerc Psychol. 2011;33:506–26.
US Department of Health and Human Services. Physical activity and health: A report of the Surgeon General. Washington, DC; 2008.
Lount Jr RB, Kerr NL, Messé LA, Seok DH, Park ES. An Examination of the Stability and Persistence of the KöhlerMotivation Gain Effect. Group Dynamics. 2008;12(4):279.
Clarke P, O'Malley PM, Johnston LD, Schulenberg JE, Lantz P. Differential trends in weight-related health behaviors among American young adults by gender, race/ethnicity, and socioeconomic status: 1984–2006. Am J Public Health. 2009;99(10):1893–901.
Bandura A. Guide for creating self-efficacy scales. In: Pajares F, Urdan T, eds. Self-efficacy beliefs of adolescents. Greenwich, CT: Informationa Age Publishing; 2006:307–37.
Mohiyeddini C, Pauli R, Bauer S. The role of emotion in bridging the intention-behavior gap: The case for sports participation. Psychol Sport Exerc. 2009;10:226–34.
Borg GAV. Borg's perceived exertion and pain scales. Champaign, IL: Human Kinetics; 1998.
Optenberg SA, Lairson DR, Slater CH, Russell ML. Agreement of self-reported and physiologically estimated fitness status in a symptom-free population. Prev Med. Jul 1984;13(4):349–54.
Troiano RP, Berrigan D, Dodd KW, Masse LC, Tilert T, McDowell M. Physical activity in the United States measured by accelerometer. Med Sci Sports Exerc. Jan 2008;40(1):181–8.
Andrew GM, Oldridge NB, Parker JO, Cunningham DA, Rechnitzer PA, Jones NL, et al. Reasons for dropout from exercise programs in post-coronary patients. Med Sci Sports Exerc. 1981;13(3):164–8.
Williams SL, French DP. What are the most effective intervention techniques for changing physical activity self-efficacy and physical activity behaviour- and are they the same? Health Educ Res. 2011;26(2):308–22.
Weiner B. Human Motivation. NY: Holt, Rinehart & Winston; 1980.
Kerr NL, Seok D, Poulsen J, Harris D, Messé LM. Social ostracism and group motivation gain. European Journal of Social Psychology. 2008;38(4):736–46.
Kerr NL, Seok DH. "… with a little help from my friends": Friendship, effort norms, and group motivation gain. Journal of Managerial Psychology. 2011;26(3):205–18.
Huffmeier J, Hertel G. When the whole is more than the sum of its parts: Motivation gains in the wild. Journal of Experimental Social Psychology. 2011;47:455–9.