| Cardiac dimensions and performance after either arm or leg endurance training. | |
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MedLine Citation:
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PMID: 7321827 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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We have recently reported improved exercise performance with untrained limbs in 10 men after 11 wk of either arm (N = 5) or leg (N = 5) endurance training. To examine the changes in cardiac function produced by short-term training, we used echocardiography to measure cardiac function at rest, and systolic time intervals (STIs) to measure cardiac function during trained and untrained limb exercise. We repeated all studies after autonomic blockade with atropine and propranolol in order to observe non-autonomic changes in cardiac function. Training had little effect on cardiac size or performance at rest, although with autonomic blockade, cardiac mass increased in the leg-training group and resting left ventricular ejection time (LVET) was prolonged when the two training groups were combined. During submaximal exercise with both trained and undrained limbs and at similar heart rates before and after training, LVET for the combined groups was increased with and without autonomic blockade. This increase in LVET is most consistent with an increased cardiac stroke volume. Short-term endurance training appears to result in improved exercise cardiac function that is in part independent of altered autonomic control or adaptations in trained skeletal muscle. |
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Authors:
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P D Thompson; S Lewis; A Varady; N Areskog; R Popp; R Debusk; W Haskell |
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Publication Detail:
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Type: Journal Article; Research Support, U.S. Gov't, P.H.S. |
Journal Detail:
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Title: Medicine and science in sports and exercise Volume: 13 ISSN: 0195-9131 ISO Abbreviation: Med Sci Sports Exerc Publication Date: 1981 |
Date Detail:
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Created Date: 1982-03-13 Completed Date: 1982-03-13 Revised Date: 2007-11-14 |
Medline Journal Info:
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Nlm Unique ID: 8005433 Medline TA: Med Sci Sports Exerc Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 303-9 Citation Subset: IM; S |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adult Arm Blood Pressure Echocardiography Heart / anatomy & histology*, physiology Heart Rate Humans Leg Male Physical Education and Training / methods* Physical Endurance Systole |
| Grant Support | |
ID/Acronym/Agency:
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HL 18907/HL/NHLBI NIH HHS |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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