التفاصيل البيبلوغرافية
| العنوان: |
Rapid vascular modifications to localized rhythmic handgrip training and detraining: vascular conditioning and deconditioning. |
| المؤلفون: |
Alomari, Mahmoud A., Mekary, Rania A., Welsch, Michael A. |
| المصدر: |
European Journal of Applied Physiology; Jul2010, Vol. 109 Issue 5, p803-809, 7p, 2 Charts, 2 Graphs |
| مصطلحات موضوعية: |
CYCLING, VASCULAR resistance, BLOOD circulation, HEMODYNAMICS, ARTERIAL occlusions, QUANTITATIVE research, PHYSIOLOGICAL adaptation, COMPARATIVE studies, EXERCISE, FOREARM, GRIP strength, RESEARCH methodology, MEDICAL cooperation, RESEARCH, RESEARCH funding, TIME, EVALUATION research, PHYSIOLOGY |
| مستخلص: |
Despite the evidence describing the rapid vascular function modifications to commencement and cessation of large muscle exercises (i.e. cycling), no studies examined the time-course vascular modifications to localized training and detraining. This study aimed to examine the effects of 4-week rhythmic handgrip exercise training and 2-week detraining on reactive hyperemic forearm blood flow and vascular resistance in 11 young men. Rhythmic handgrip exercise was performed in the non-dominant forearm for 20 min/day, 5 days/week, at 60% of maximum voluntary contraction for 4 weeks, followed by 2 weeks of no training. Forearm blood flow and vascular resistance were evaluated, in both arms, at rest and following arterial occlusion. These vascular function indices were obtained in five visits; before, after 1 and 4 week(s) of training as well as after 1 and 2 week(s) of training cessation. Resting cardiovascular measures were not altered during the study period. A 2 (arms) x 5 (visits) ANOVA revealed significant arms-by-visits interactions for reactive hyperemic forearm blood flow (p = 0.02) and vascular resistance (p = 0.02). Subsequent comparison demonstrated increased trained forearm reactive hyperemic blood flow 1 week after training, then returned to pre-training values 1 week following training cessation. In contrast, vascular resistance decreased 1 week after training commencement, only to return to pretraining level 1 week after training cessation. These results indicate a rapid, unilateral improvement in regional reactive hyperemic blood flow and vascular resistance following localized exercise-training. However, the improvements are transient and return to pretraining levels 1 week after detraining. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
Complementary Index |
