[article] 
inAnnals of physical and rehabilitation medicine > Vol. 61, n°4 (Juillet 2018) . - p. 207-214

Titre :	A prospective study examining the influence of cardiac rehabilitation on the sedentary time of highly sedentary, physically inactive patients
Type de document :	texte imprimé
Auteurs :	A. Biswas ; P.I. Oh ; G.E. Faulkner ; D.A. Alter
Année de publication :	2018
Article en page(s) :	p. 207-214
Note générale :	Doi : 10.1016/j.rehab.2017.06.003
Langues :	Anglais (eng)
Mots-clés :	Cardiac rehabilitation  Cardiovascular diseases  Sedentary lifestyle  Exercise
Résumé :	Objectives Prolonged sedentary time is recognized as a distinct health risk, and mortality risks are expected to be greatest for individuals with low exercise levels. It is unknown whether participation in exercise-based cardiac rehabilitation (CR) programs influences sedentary behaviour particularly among those patients expected to be at greatest mortality risk. This study examined the influence of CR participation on sedentary behaviour and identified the proportion and characteristics (socio-demographic and clinical) of patients who do not meet exercise recommendations and have prolonged sedentary times. Methods A prospective study was conducted among patients of an exercise-based CR program and assessments performed at baseline and 3 months. Physical activity and sedentary behaviour information were collected by self-report, and convergent validity was examined on an accelerometer-wearing subsample. Results Of 468 CR patients approached, 130 participants were recruited with an average sedentary time of 8hours/day. Sedentary behaviour remained consistent at follow-up (relative change= −2.4%, P=0.07) notwithstanding a greater proportion meeting exercise recommendations (relative change= 57.4%). 19.2% of participants were classified to have prolonged sedentary time and not meet exercise recommendations at baseline. No significant differences were found between the characteristics of high-risk individuals and lower risk subgroups. Findings were consistent among the accelerometer-derived subgroup and the overall sample despite poor to moderate convergent validity. Conclusions These results suggest that the exercise-focus of CR may not reduce sedentary behaviours. Future studies are needed to determine whether sedentary behaviour-specific reduction strategies are more effective than traditional exercise-based strategies and lead to meaningful improvements in clinical outcomes.
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[article] A prospective study examining the influence of cardiac rehabilitation on the sedentary time of highly sedentary, physically inactive patients [texte imprimé] / A. Biswas ; P.I. Oh ; G.E. Faulkner ; D.A. Alter . - 2018 . - p. 207-214.
Doi : 10.1016/j.rehab.2017.06.003
Langues : Anglais (eng)
in Annals of physical and rehabilitation medicine > Vol. 61, n°4 (Juillet 2018) . - p. 207-214

Mots-clés :	Cardiac rehabilitation  Cardiovascular diseases  Sedentary lifestyle  Exercise
Résumé :	Objectives Prolonged sedentary time is recognized as a distinct health risk, and mortality risks are expected to be greatest for individuals with low exercise levels. It is unknown whether participation in exercise-based cardiac rehabilitation (CR) programs influences sedentary behaviour particularly among those patients expected to be at greatest mortality risk. This study examined the influence of CR participation on sedentary behaviour and identified the proportion and characteristics (socio-demographic and clinical) of patients who do not meet exercise recommendations and have prolonged sedentary times. Methods A prospective study was conducted among patients of an exercise-based CR program and assessments performed at baseline and 3 months. Physical activity and sedentary behaviour information were collected by self-report, and convergent validity was examined on an accelerometer-wearing subsample. Results Of 468 CR patients approached, 130 participants were recruited with an average sedentary time of 8hours/day. Sedentary behaviour remained consistent at follow-up (relative change= −2.4%, P=0.07) notwithstanding a greater proportion meeting exercise recommendations (relative change= 57.4%). 19.2% of participants were classified to have prolonged sedentary time and not meet exercise recommendations at baseline. No significant differences were found between the characteristics of high-risk individuals and lower risk subgroups. Findings were consistent among the accelerometer-derived subgroup and the overall sample despite poor to moderate convergent validity. Conclusions These results suggest that the exercise-focus of CR may not reduce sedentary behaviours. Future studies are needed to determine whether sedentary behaviour-specific reduction strategies are more effective than traditional exercise-based strategies and lead to meaningful improvements in clinical outcomes.
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