Lactic acid accumulation in cardiac patients performing circuit weight training: implications for exercise prescription
| Autor: | David W. DeGroot, William B. Olney, Neil B. Vroman, Robert Kertzer, Timothy J. Quinn |
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| Rok vydání: | 1998 |
| Předmět: |
Male
medicine.medical_specialty Lifting Weight Lifting Strength training Myocardial Infarction Physical Therapy Sports Therapy and Rehabilitation chemistry.chemical_compound Internal medicine medicine Humans Lactic Acid Treadmill Angioplasty Balloon Coronary Coronary Artery Bypass Aged business.industry Rehabilitation Middle Aged Intervention studies Crossover study Lactic acid Defibrillators Implantable Exercise Therapy Distress chemistry Physical therapy Cardiology Analysis of variance Exercise prescription business |
| Zdroj: | Archives of physical medicine and rehabilitation. 79(7) |
| ISSN: | 0003-9993 |
| Popis: | Because blood lactic acid (LA) levels may be important in prescribing exercise for cardiac patients, this study documented the LA response to four different circuit weight training (CWT) protocols and compared these responses to both maximal treadmill and LA threshold values.Intervention study following a crossover trial design.A phase III community-based setting.All subjects had documented cardiac disease and were volunteers.We used 40% and 60% of the one-repetition maximum (1-RM) for six exercises and 30 or 60sec of rest between each station, resulting in four protocols, performed in random order. A discontinuous treadmill test was conducted, and the LA threshold was determined.The main dependent variable was LA after each CWT protocol.No signs or symptoms suggestive of cardiovascular distress during any of the four CWT protocols were reported. A repeated-measures analysis of variance showed that the LA threshold value was significantly less than all four CWT protocols (p.05). The CWT responses were also compared with the traditional LA threshold value of 4.0mmol/L, and both 60% protocols were significantly elevated (p.05).Because no positive signs or symptoms were reported, we recommend starting stable cardiac patients on a CWT program with an initial load between 40% and 60% 1-RM and allowing at least 60sec of rest between exercises. |
| Databáze: | OpenAIRE |
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