Bredahl, Thomas Viskum Gjelstrup5; Singhammer, John5
1 Department of Sports Science and Clinical Biomechanics, Det Sundhedsvidenskabelige Fakultet, SDU2 Movement, Sport and Society, Department of Sports Science and Clinical Biomechanics, Det Sundhedsvidenskabelige Fakultet, SDU3 Exercise Epidemiology, Department of Sports Science and Clinical Biomechanics, Det Sundhedsvidenskabelige Fakultet, SDU4 Research in Childhood Health (RICH), Department of Sports Science and Clinical Biomechanics, Det Sundhedsvidenskabelige Fakultet, SDU5 Department of Sports Science and Clinical Biomechanics, Det Sundhedsvidenskabelige Fakultet, SDU
Background: Knowledge is needed concerning whether intense prescribed exercise interventions are effective in regards to long-term effects on physical activity levels. A successful and lasting outcome of a behaviour-change intervention is believed to be contingent on the inclusion of psychological issues such as self-rated quality of life and self-rated health. This study extends previous research conducted on the long-term influence of prescribed exercise on psychosocial issues. Specifically, it was analysed if participants’ level of self-rated health (good or poor) at baseline would be decisive for the level of physical activity in the long term. Methods: This study included a baseline analysis of participants in a treatment group (TG) and follow-up after 4, 10 and 16 months. The TG included individuals with lifestyle diseases who followed supervised group-based training and received motivational counselling. The TG was divided into “good” and “poor” self-rated health at baseline. Linear growth curve analyses (multilevel linear regression) were used to examine the data. Results: The results yielded a statistical significant difference of 1.71 metabolic equivalents (MET) between participants with good versus poor health at baseline. Also, a difference of MET was observed at 10 months. MET increased by 0.85 units for participants with good self-rated health (SE = 0.094) from baseline to 16 months, though the increase between subsequent points in time was small and non-significant. In contrast, considerably more variation in the development of MET over time was observed among participants with poor self-rated health. Overall, MET increased by 2.53 units across the whole time span. Results were influenced by the overall proportion of drop-out for participants with good and poor self-rated health with values of 28% and 79%, respectively. Conclusions: Exercise on Prescription (EoP) improves levels of physical activity (MET) of participants with good and poor self-rated health in the long term enough to accommodate national guidelines of levels of physical activity. Participants with poor self-rated health will improve their level of physical activity to a clinical relevant level in the long term, if they manage to stay compliant during the observation period. An assessment of good and poor self-rated health supplemented by a discussion of psychical and physical domains of self-rated health as barriers by the general practitioner (GP), could possibly enhance compliance and thereby long-term adherence to physical activity.
Sport Science Review, 2011, Vol XX, Issue 5-6, p. 73-94