Abstract
Resistance training has traditionally been discouraged in cardiac patients due to a fear that it may elicit an unacceptable haemodynamic response, however more recentevidence suggests these concerns are unfounded.
The present investigation examined the effect of resistance training on muscular strength, resting and exercise haemodynamics, aerobic capacity (peak V02), body composition and self efficacy in males post coronary artery bypass graft (CABG)surgery. All subjects were clinically stable and at least three months post CABG. Twelve experimental subjects (61.2 ± 8.4 years) were circuit weight trained (CWT) for36 minutes, three times per week over 10 weeks at an intensity of 40-60% maximumvoluntary contraction ( MVC). No ischaemic signs or symptoms were recorded duringtraining. The 14 control subjects (59.0 ±8.7 years) maintained their current activitylevel for the ten week period. Strength was assessed using the one repetition maximum (RM) technique, and the haemodynamic response was assessed during dynamic (graded exercise), isometric (weight holding) and isodynamic (weight carrying) exercise. Following training, mean strength was increased by 17.8% across all exercises in the experimental group, however mean strength was essentially unchanged (decrease of3.4%) in the control group. No significant changes occurred in the haemodynamic response at rest or during the three exercise modes, indicating unchanged myocardial oxygen demand. Similarly the training program did not result in an improvement inpeak V02, body composition, or self efficacy. These findings suggest that 10 weeks of CWT at 40-60% MVC is safe and effective in improving muscular strength in clinically stable males post CABG. However there was no concurrent effect on resting or exercise haemodynamics, peak V02, body composition or self efficacy.
The present investigation examined the effect of resistance training on muscular strength, resting and exercise haemodynamics, aerobic capacity (peak V02), body composition and self efficacy in males post coronary artery bypass graft (CABG)surgery. All subjects were clinically stable and at least three months post CABG. Twelve experimental subjects (61.2 ± 8.4 years) were circuit weight trained (CWT) for36 minutes, three times per week over 10 weeks at an intensity of 40-60% maximumvoluntary contraction ( MVC). No ischaemic signs or symptoms were recorded duringtraining. The 14 control subjects (59.0 ±8.7 years) maintained their current activitylevel for the ten week period. Strength was assessed using the one repetition maximum (RM) technique, and the haemodynamic response was assessed during dynamic (graded exercise), isometric (weight holding) and isodynamic (weight carrying) exercise. Following training, mean strength was increased by 17.8% across all exercises in the experimental group, however mean strength was essentially unchanged (decrease of3.4%) in the control group. No significant changes occurred in the haemodynamic response at rest or during the three exercise modes, indicating unchanged myocardial oxygen demand. Similarly the training program did not result in an improvement inpeak V02, body composition, or self efficacy. These findings suggest that 10 weeks of CWT at 40-60% MVC is safe and effective in improving muscular strength in clinically stable males post CABG. However there was no concurrent effect on resting or exercise haemodynamics, peak V02, body composition or self efficacy.
| Original language | English |
|---|---|
| Qualification | Masters |
| Awarding Institution |
|
| DOIs | |
| Publication status | Unpublished - 1995 |
Take-down notice
- This thesis has been made available in the UWA Profiles and Research Repository as part of a UWA Library project to digitise and make available theses completed before 2003. If you are the author of this thesis and would like it removed from the UWA Profiles and Research Repository, please contact [email protected]