Lack of age-related decreases in basal whole leg blood flow in resistance-trained men

Motohiko Miyachi*, Hirofumi Tanaka, Hiroshi Kawano, Mayumi Okajima, Izumi Tabata

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

36 Citations (Scopus)

Abstract

Reductions in basal leg blood flow have been implicated in the pathogenesis of metabolic syndrome and functional impairment in humans. We tested the hypothesis that reductions in basal whole leg blood flow with age are either absent or attenuated in those who perform regular strength training. A total of 104 normotensive men aged 20-34 yr (young) and 35-65 yr (middle aged), who were either sedentary or resistance trained, were studied. Mean and diastolic blood pressures were higher (P < 0.05-0.001) in the middle-aged compared with the young men, but there were no significant differences between the sedentary and resistance-trained groups. In the sedentary group, basal whole leg blood flow (duplex Doppler ultrasound) and vascular conductance were lower (∼30 and ∼38%, respectively; P < 0.01) in the middle-aged compared with the young men. There were no such age-related differences in the resistance-trained group. In the young men, basal whole leg blood flow and vascular conductance were not different between the two activity groups, but, in the middle-aged men, they were higher (∼35 and ∼36%, respectively; P < 0.01) in the resistance-trained men than in the sedentary men. When blood flow and vascular conductance were expressed relative to the leg muscle mass, the results were essentially the same. We concluded that the age-related reduction in basal whole leg blood flow is absent in resistance-trained men. These results suggest that resistance training may favorably influence leg perfusion in aging humans, independent of its impact on leg muscle mass.

Original languageEnglish
Pages (from-to)1384-1390
Number of pages7
JournalJournal of Applied Physiology
Volume99
Issue number4
DOIs
Publication statusPublished - 2005 Oct
Externally publishedYes

Keywords

  • Aging
  • Artery
  • Exercise
  • Hemodynamics
  • Ultrasonics

ASJC Scopus subject areas

  • Physiology
  • Physiology (medical)

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