The purpose of this thesis investigation was to evaluate the effects of combined aerobic and weightlifting training on the circulatory responses of patients with coronary artery disease (CAD) during formal lifting, and during strength related activities of daily living. Seven subjects (x age: 54 years) successfully completed 20 sessions of training within 12 weeks. The aerobic training regimen consisted of a 5-10 minute warm up, walking, arm buoys, and arm-and leg-cycling at an intensity equivalent to approximately 70% of functional capacity. The weightlifting regimen consisted of single-arm curl (SAC), and single-leg press (SLP) exercises performed by both limbs, in addition to modified trunk curls. Before and after training, intra-brachial artery pressure was measured continuously during: 10 repetitions of the seated SAC exercise at 70% of the subject's one repetition maximum (1 RM), 12 repetitions of the SLP and double-leg press (DLP) exercises at 80% of 1 RM, isometric handgrip at 50% of maximal voluntary contraction strength, 10 flights of stair climbing at a cadence of 60 steps/minute, and 10 minutes of horizontal treadmill walking at 3.5 mph. Training increased the SAC, SLP, and DLP 1 RM strength by 98% (15 vs 30 kg; p < 0.016), 23% (99 vs 122 kg; p < 0.002), and 27% (165 vs 210 kg; p < 0.001) respectively. The mean peak systolic, diastolic, and mean arterial pressures, heart rate and rate pressure product were attenuated in all 3 weightlifting exercises when subjects lifted the same absolute load (70% of the pre-training 1 RM for the SAC exercise, and 80% of the pre-training 1 RM for the SLP and DLP exercises) after training. When subjects lifted the same relative load after training, all circulatory responses increased. The average peak heart rate and arterial pressure responses were reduced during 10 minutes of horizontal treadmill walking after training. In contrast, there was little or no reduction in any of the measured parameters during stair climbing. It is concluded that weightlifting training in CAD patients results in an attenuation of the heart rate and arterial blood pressure responses during repeated lifting with identical absolute loads, and there may be a modest transfer of this effect to certain activities of daily living involving the trained muscles. / Thesis / Master of Science (MS)
| Identifer | oai:union.ndltd.org:mcmaster.ca/oai:macsphere.mcmaster.ca:11375/24533 |
| Date | 08 1900 |
| Creators | Wiecek, Elizabeth |
| Contributors | McCartney, Neil, Human Biodynamics |
| Source Sets | McMaster University |
| Language | English |
| Detected Language | English |
| Type | Thesis |
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