Quality of life research : an international journal of quality of life aspects of treatment, care and rehabilitation · 2018
The relationship between exercise dose and health-related quality of life with a phase III cardiac rehabilitation program.
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Del Pozo-Cruz Borja, Carrick-Ranson Graeme, Reading Stacey, Nolan Paul, Dalleck Lance C
Аннотация
PURPOSE: To quantify the relationship between the change in exercise dose and health-related quality of life (HRQoL) in a cohort of patients participating in a community-based phase-3 cardiac rehabilitation (CR) program.
METHODS: A retrospective, pre-experimental (no control group) design of 58 participants that completed a phase-3, 12-week exercise-based CR program was used to test the current hypothesis. Self-reported HRQoL (36-Item Short Form Health Survey Version 2, SF-36v2) was assessed prior and after completing the CR program. The change in exercise dose was estimated from the assigned training load in weeks 1 and 12 of the CR program. A series of regression models were fitted to ascertain the relationship between the change in exercise dose and changes in the SF-36v2.
RESULTS: There was a strong quadratic trend between the change in exercise dose and the mean change in SF-36 Mental and Physical Health Summary Scores. Analysis of covariance showed that the mean changes in the SF-36 Summary Scores statistically fluctuate across quartiles of exercise dose. The data show that there is a threshold amount of increase in exercise (Q2; 350-510 kcal week- 1) needed to HRQoL and that greater amounts of exercise dose (Q3; 511-687 and Q4 ≥ 688 kcal week- 1) did not improve HRQoL further.
CONCLUSIONS: The current findings suggest that physical and mental health-related quality of life are improved with a phase-3 CR program. The dose-response relationship observed indicates that a threshold exercise dose is required to improve HRQoL, and that larger doses of exercise do not confer further improvements in HRQoL.
METHODS: A retrospective, pre-experimental (no control group) design of 58 participants that completed a phase-3, 12-week exercise-based CR program was used to test the current hypothesis. Self-reported HRQoL (36-Item Short Form Health Survey Version 2, SF-36v2) was assessed prior and after completing the CR program. The change in exercise dose was estimated from the assigned training load in weeks 1 and 12 of the CR program. A series of regression models were fitted to ascertain the relationship between the change in exercise dose and changes in the SF-36v2.
RESULTS: There was a strong quadratic trend between the change in exercise dose and the mean change in SF-36 Mental and Physical Health Summary Scores. Analysis of covariance showed that the mean changes in the SF-36 Summary Scores statistically fluctuate across quartiles of exercise dose. The data show that there is a threshold amount of increase in exercise (Q2; 350-510 kcal week- 1) needed to HRQoL and that greater amounts of exercise dose (Q3; 511-687 and Q4 ≥ 688 kcal week- 1) did not improve HRQoL further.
CONCLUSIONS: The current findings suggest that physical and mental health-related quality of life are improved with a phase-3 CR program. The dose-response relationship observed indicates that a threshold exercise dose is required to improve HRQoL, and that larger doses of exercise do not confer further improvements in HRQoL.