Acute Changes in Blood Lactate Concentration, Muscle Thickness, and Strength After Walking with Blood Flow Restriction in Older Adults

• NATSUME TOSHIHARU

  Institute of Health and Sports Science and Medicine, Juntendo University

• OZAKI HAYAO

  Faculty of Health and Sports Science, Juntendo University

• NAKAGATA TAKASHI

  Faculty of Health and Sports Science, Juntendo University

• MACHIDA SHUICHI

  Faculty of Health and Sports Science, Juntendo University Graduate School of Health and Sports Science, Juntendo University

• NAITO HISASHI

  Faculty of Health and Sports Science, Juntendo University Graduate School of Health and Sports Science, Juntendo University

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.

収録刊行物

• 順天堂醫事雑誌

  順天堂醫事雑誌 62 (Suppl.1), 237-242, 2016

  順天堂医学会

キーワード

• ultrasonic
• muscle cell swelling
• metabolic accumulation

詳細情報

• CRID: 1390282680496376960
• NII論文ID: 130005865669
• DOI: 10.14789/jmj.62.s237
• ISSN: 21882126
• ISSN: 21879737
• Web Site: https://www.jstage.jst.go.jp/article/jmj/62/Suppl.1/62_237/_pdf
• 本文言語コード: en
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• 抄録ライセンスフラグ: 使用不可