Physiological and psychologicaleffects of training-a comparison of individual and gymnasiumprograms with a characterization of the exercise "drop-out
Massie
ShephardPhysiological and psychologicaleffects of training-a comparison of individual and gymnasiumprograms with a characterization of the exercise drop-out[1971]
Physical activityparticipation: Social cognitive theory versus the theories of reasonedaction and planned behavior
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