Effect of light resistance exercise after ingestion of a high-protein snack on plasma branched-chain amino acid concentrations in young adult females

Yushi Kato, Atsushi Sawada, Shigeharu Numao, Ryoko Miyauchi, Kazuhiko Imaizumi, Shizuo Sakamoto, Suzuki Masashige Suzuki

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

We have previously reported the preventive effects of light resistance exercise (voluntary tower climbing exercise) after ingestion of a high-protein snack (HPS) on muscle loss in glucocorticoid-injected rats. However, such studies have not been performed in humans. In this cross-over study, we examined the effect of light resistance exercise after ingestion of HPS on plasma branched-chain amino acid (BCAA) concentrations in humans. Seven healthy young adult females (aged 22.1±1.2 y) participated in this study. They were assigned to either an exercise group or a control group. Seven days after the first experiment, they were crossed over to the opposite intervention. The subjects ingested HPS (15 g protein, 18 g sugar) 3 h after breakfast (basal meal). The plasma BCAA concentrations increased at 30 min after HPS ingestion. The subjects in the exercise group performed light resistance exercise (15 min dumbbell exercise using 300 g brown-rice-filled fabric dumbbells) when the plasma BCAA concentrations were increased (60 min after the snack ingestion). The control group maintained a resting position during the experiment. Changes in the plasma BCAA concentrations between 60 and 90 min after HPS ingestion increased continuously in the control group (+ 27 μmol/L) but decreased in the exercise group (- 37 μmol/L). Therefore, light resistance exercise after HPS ingestion may be effective for utilization of plasma BCAA in humans.

Original languageEnglish
Pages (from-to)106-111
Number of pages6
JournalJournal of Nutritional Science and Vitaminology
Volume55
Issue number2
DOIs
Publication statusPublished - 2009 Dec 8

Keywords

  • Branched-chain amino acids
  • Dumbbell exercise
  • High-protein snack
  • Light resistance exercise
  • Muscular blood flow

ASJC Scopus subject areas

  • Medicine (miscellaneous)
  • Nutrition and Dietetics

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