title: Myocardial work during endurance training and resistance training: a daily comparison, from workout session 1 through completion of cardiac rehabilitation.
abstract: Patients in cardiac rehabilitation are typically advised to complete a period of supervised endurance training before beginning resistance training. In this study, however, we compared the peak rate-pressure product (RPP, a calculated indicator of myocardial work) of patients during two types of exercise-treadmill walking and chest press-from workout session 1 through completion of cardiac rehabilitation. Twenty-one patients (4 women and 17 men, aged 35 to 70 years) were enrolled in the study; they were referred for cardiac rehabilitation after myocardial infarction, percutaneous coronary intervention, or both. The participants did treadmill walking and chest press exercises during each workout session. Peak values for heart rate (HR) and systolic blood pressure (SBP) were recorded, and the peak RPP was calculated (peak HR multiply sign in box peak SBP). Paired t tests were used to compare the data collected during the two types of exercise across 19 workout sessions. The mean peak values for HR, SBP, and RPP were lower during resistance training than during endurance training; the differences were statistically significant (P < 0.05), with only one exception (the SBP for session 1). Across all 19 workout sessions, the participants performed more myocardial work, as indicated by the peak RPP, during treadmill walking than during the chest press.
authors.affiliation: Cardiac Rehabilitation Department, Baylor Jack and Jane Hamilton Heart and Vascular Hospital, Dallas, Texas (Adams, Hubbard, McCullough-Shock, Simms, Hartman, Strauss, Anderson, Lawrence, Malorzo), and the Institute for Health Care Research and Improvement, Baylor Health Care System, Dallas, Texas (Cheng).
authors.forename: Jenny
authors.initials: J
authors.lastname: Adams
authors.forename: Matthew
authors.initials: M
authors.lastname: Hubbard
authors.forename: Tiffany
authors.initials: T
authors.lastname: McCullough-Shock
authors.forename: Kay
authors.initials: K
authors.lastname: Simms
authors.forename: Dunlei
authors.initials: D
authors.lastname: Cheng
authors.forename: Julie
authors.initials: J
authors.lastname: Hartman
authors.forename: Danielle
authors.initials: D
authors.lastname: Strauss
authors.forename: Valerie
authors.initials: V
authors.lastname: Anderson
authors.forename: Anne
authors.initials: A
authors.lastname: Lawrence
authors.forename: Emily
authors.initials: E
authors.lastname: Malorzo
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