Journal
ONCOTARGET
Volume 7, Issue 23, Pages 33595-33607Publisher
IMPACT JOURNALS LLC
DOI: 10.18632/oncotarget.9564
Keywords
sarcopenia; vascular occlusion; muscle hypertrophy; resistance exercise; arterial stiffness; Gerotarget
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Funding
- Japan Ministry of Education, Culture, Sports, Science, and Technology [24300189, 25750288]
- Nakatomi Foundation
- Vehicle Racing Commemorative Foundation
- Grants-in-Aid for Scientific Research [25750288, 15K01553] Funding Source: KAKEN
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We examined the effect of elastic band training with blood flow restriction (BFR) on thigh muscle size and vascular function in older women. Older women were divided into three groups: low-intensity elastic band BFR training (BFR-Tr, n = 10), middle-to high-intensity elastic band training (MH-Tr, n = 10), and no training (Ctrl, n = 10) groups. BFR-Tr and MH-Tr groups performed squat and knee extension exercises using elastic band, 2 days/week for 12 weeks. During BFR-Tr exercise session, subjects wore pressure cuffs around the most proximal region of both thighs. The following measurements were taken before (pre) and 3-5 days after (post) the final training session: MRI-measured muscle cross-sectional area (CSA) at mid-thigh, maximum voluntary isometric contraction (MVIC) of knee extension, central systolic blood pressure (c-SBP), central-augmentation index (c-AIx), cardio-ankle vascular index testing (CAVI), ankle-brachial pressure index (ABI). Quadriceps muscle CSA (6.9%) and knee extension MVIC (13.7%) were increased (p < 0.05) in the BFR-Tr group, but not in the MH-Tr and the Ctrl groups. Regarding c-SBP, c-AIx, CAVI and ABI, there were no changes between pre- and post-results among the three groups. Elastic band BFR training increases thigh muscle CSA as well as maximal muscle strength, but does not decrease vascular function in older women.
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