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The Effects of Twelve Weeks of Whole-Body Vibration Training and Low-Intensity Resistance Exercise Training on Arterial Function, Muscle Strength, and Physical Performance in Dynapenic Postmenopausal Women.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	The Effects of Twelve Weeks of Whole-Body Vibration Training and Low-Intensity Resistance Exercise Training on Arterial Function, Muscle Strength, and Physical Performance in Dynapenic Postmenopausal Women./
作者:	Jaime, Salvador J.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2017,
面頁冊數:	122 p.
附註:	Source: Dissertations Abstracts International, Volume: 79-07, Section: B.
Contained By:	Dissertations Abstracts International79-07B.
標題:	Health sciences. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10602064
ISBN:	9780355327571

The Effects of Twelve Weeks of Whole-Body Vibration Training and Low-Intensity Resistance Exercise Training on Arterial Function, Muscle Strength, and Physical Performance in Dynapenic Postmenopausal Women.
Jaime, Salvador J.

The Effects of Twelve Weeks of Whole-Body Vibration Training and Low-Intensity Resistance Exercise Training on Arterial Function, Muscle Strength, and Physical Performance in Dynapenic Postmenopausal Women. - Ann Arbor : ProQuest Dissertations & Theses, 2017 - 122 p.

Source: Dissertations Abstracts International, Volume: 79-07, Section: B.

Thesis (Ph.D.)--The Florida State University, 2017.

This item must not be sold to any third party vendors.

PURPOSE: The aim of this study were; 1) to evaluate the effects of 12 weeks of WBVT and LIRET on hemodynamics and arterial stiffness; 2) to evaluate the effects of WBVT and LIRET on muscle strength as well as physical performance (6-minute walk test); and 3) to evaluate the effect of 12 weeks of WBVT and LIRET on endothelial function and vasodilatory response to exercise. METHODS: Thirty-one postmenopausal women were stratified by age, body mass index (BMI), and maximal voluntary contraction (MVC) (age, 65 ± 4 years; BMI, 23.2 ± 2.6 kg/m2; MVC, 17.3 ± 2.7 kg) and randomized into 2 experimental intervention groups, WBVT and LIRET, or a control group for 12 weeks. WBVT and LIRET consisted of 3 supervised exercise sessions per week (4 leg exercises). The following parameters were measured before and after 12 weeks of the assigned intervention: brachial and aortic systolic blood pressure (SBP), diastolic BP (DBP), mean arterial pressure (MAP), pulse pressure (PP), heart rate, augmented pressure (AP), augmentation index (AIx), AIx adjusted to 75 beats per minute (AIx 75), carotid-femoral PWV (cfPWV), brachial-ankle PWV (baPWV), femoral-ankle PWV (faPWV), fat mass (FM), fat-free mass (FFM), brachial and popliteal diameter, mean blood velocity (MBV), blood flow, vascular conductance, active and reactive hyperemia, 6-minute walk test time (6MWT), and leg strength including leg press (LP), flexion (LFlex), and extension (LExt). RESULTS: There were no significant differences between groups for any variables except for HR and 6MWT distance, which were lower and higher, respectively, in the WBVT compared to the other two groups at baseline. There were no significant changes in peripheral or central pressures over the 12-week intervention period. The WBVT group had significant reductions in AIx (-4.2 ± 1.5%, P = 0.016), AIx 75 (-4.2 ± 1.7 %, P = 0.033), and cfPWV (-.42 ± .18 m/s, P = 0.041) over the 12-week training protocol. There were significant group-by-time interactions for reductions in AP and AIx (with AIx 75 trending P = 0.051) in the WBVT, but not in LIRET or control groups ( P < 0.05). Although resting brachial and popliteal characteristics (i.e. diameter and flow) were similar at rest between groups, WBVT and LIRET induced greater vasodilatory responses to flow-mediated dilation compared to control (P < 0.01), illustrating increased endothelial function. Additionally, WBVT elicited a greater vasodilatory response immediately post-exercise in the popliteal artery (4.9 ± 1.4 %, P = 0.007) compared to no change in control. Both, WBVT and LIRET elicited significant increases in LP, LFlex, and LExt over time (P < 0.01). These increases were significantly greater than no change in the control group. Additionally, WBVT induced a greater increase (19.2 ± 3.7%) in LExt strength compared to the increase (8.4 ± 2.6%) observed in the LIRET group (P = 0.007). The increase in LExt strength in the WBVT group was strongly associated with decreased AP (r= -.586, P = 0.045) and AIx (r=-.713, P = 0.009). CONCLUSION: We show that WBVT significantly reduced AIx and increased leg extension strength following 12 weeks of training compared to LIRET and control. The present study demonstrates that WBVT decreases central pressure wave reflection, an effect that was not accomplished by LIRET, despite similar increases in LP and LFlex strength. Interestingly, both WBVT and LIRET increased endothelial function as measured by brachial artery flow-mediated dilation (systemic effect). WBVT increasing exercise-induced vasodilation in the popliteal artery (local effect) following a 6MWT with no changes in LIRET or control. While WBVT and LIRET induced similar changes in leg strength and systemic endothelial function, only WBVT reduced known indices of left ventricle afterload that are associated with cardiovascular morbidity and mortality. Therefore, while LIRET may be a feasible modality to attenuate dynapenia, it is not effective in addressing the cardiovascular risk associated with reduced muscle mass and strength in apparently healthy postmenopausal women. WBVT may be the most efficacious modality to address these concerns. (Abstract shortened by ProQuest.).

ISBN: 9780355327571Subjects--Topical Terms:

3168359
Health sciences.

The Effects of Twelve Weeks of Whole-Body Vibration Training and Low-Intensity Resistance Exercise Training on Arterial Function, Muscle Strength, and Physical Performance in Dynapenic Postmenopausal Women.
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