Cooperative effects of exercise and occlusive stimuli on muscular function in low-intensity resistance exercise with moderate vascular occlusion

Yudai Takarada, Tomomi Tsuruta, Naokata Ishii

Research output: Contribution to journalArticle

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Abstract

To obtain insight into the relative contributions of exercise and occlusive stimuli to these muscular adaptations, the present study investigated the short- and long-term effects of varied combinations of low-intensity exercise and vascular occlusion. The subjects were separated into 3 groups (n = 6 for each group): low-intensity with vascular occlusion (LIO), low-intensity without vascular occlusion (LI), and vascular occlusion without exercise (VO). LIO and LI groups performed bilateral knee extension exercises in seated positions with an isotonic extension machine. In the LIO group, both sides of the thigh were pressure-occluded at the proximal end by means of a tourniquet during the entire session of exercise (∼10 min), whereas only the occlusion with the same pressure and duration was given in the VO group. The mean occlusion pressure was 218 ± 8.1 mmHg (mean ± SE). The exercise session consisted of five sets of exercise at an intensity of 10-20% 1RM and was performed twice a week for 8 wk. After the period of exercise training, isometric and isokinetic strengths at all velocities examined increased significantly in the LIO group (p < 0.05), whereas no significant change in strength was seen in the LI and VO groups. The increase in muscular strength in LIO was associated with a significant increase in the cross-sectional area of knee extensor muscles by 10.3 ± 1.6%. The plasma growth hormone concentration measured 15 min after the session of exercise showed a marked increase only in LIO. The results showed that the low-intensity exercise and occlusive stimuli have cooperative effects in the long-term adaptation of muscle and an acute response to growth hormone.

Original languageEnglish
Pages (from-to)585-592
Number of pages8
JournalJapanese Journal of Physiology
Volume54
Issue number6
DOIs
Publication statusPublished - 2004 Dec

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Blood Vessels
Pressure
Growth Hormone
Knee
Muscles
Tourniquets
Thigh
Posture
Exercise

Keywords

  • Growth hormone
  • Muscular hypertrophy
  • Occlusion

ASJC Scopus subject areas

  • Physiology

Cite this

Cooperative effects of exercise and occlusive stimuli on muscular function in low-intensity resistance exercise with moderate vascular occlusion. / Takarada, Yudai; Tsuruta, Tomomi; Ishii, Naokata.

In: Japanese Journal of Physiology, Vol. 54, No. 6, 12.2004, p. 585-592.

Research output: Contribution to journalArticle

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