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Nigg, C.; Hellsten, L.; Norman, G.; Braun, L.; Breger, R.; Burbank, P.; Coday, M.; Elliot, D.; Garber, C.; Greaney, M.; Keteyian, S.; Lees, F.; Matthews, C.; Moe, E.; Resnick, B.; Riebe, D.; Rossi, J.; Toobert, D.; Wang, T.; Welk, G.; ... (2005). Physical activity staging distribution: Establishing a heuristic using multiple studies. Annals of behavioral medicine, 29(2), pp. 35-45. Springer 10.1207/s15324796abm2902s_7
