順天堂醫事雑誌
Online ISSN : 2188-2126
Print ISSN : 2187-9737
ISSN-L : 2187-9737
Poster Sessions - Locomotive Syndrome
Acute Changes in Blood Lactate Concentration, Muscle Thickness, and Strength After Walking with Blood Flow Restriction in Older Adults
TOSHIHARU NATSUMEHAYAO OZAKITAKASHI NAKAGATASHUICHI MACHIDAHISASHI NAITO
著者情報
ジャーナル フリー

2016 年 62 巻 Suppl.1 号 p. 237-242

詳細
抄録

Objective: The purpose of this study was to investigate whether blood flow restriction (BFR) walking results in an acute increase in muscle size and decrease in maximal strength as well as metabolic accumulation in older adults.

Methods: Ten older men and 8 older women (mean±standard error; age, 68±1 years; height, 161.8±1.8 cm; weight, 60.7±8.5 kg) walked for 20 minutes with BFR at a pre-determined speed (3-4 km/h). Muscle thickness (MT) was measured at the following four sites: knee extensors (KE) and flexors (KF) at 50% of the thigh length and dorsi flexors (DF) and plantar flexors (PF) at 30% of the lower leg length. The maximal voluntary isometric strength of KE and blood lactate concentrations were measured. All parameters were measured before and immediately after the exercise session.

Results: MT increased at all sites after BFR walking (KE: pre 28.9±1.0 mm, post 32.3±0.9 mm; KF: pre 53.3±1.2 mm, post 55.2±1.4 mm; DF: pre 23.9±0.6 mm, post 24.7±0.5 mm; PF: pre 61.0±1.1 mm, post 63.8±1.0 mm). The maximal voluntary isometric strength of KE decreased after BFR walking (pre, 144±9.5 Nm; post, 136.5±8.7 Nm). Blood lactate concentration was significantly elevated after BFR walking (pre, 1.3±0.1 mol/l; post, 1.9±0.2 mol/l).

Conclusion: BFR walking causes an acute increase in muscle size and decrease in maximal strength as well as metabolic accumulation in older adults.

著者関連情報
© 2016 The Juntendo Medical Society. This is an open access article distributed under the terms of Creative Commons Attribution License (CC BY), which permits unrestricted use, distribution, and reproduction in any medium, provided the original source is properly credited.
前の記事 次の記事
feedback
Top