Effectiveness of Nutritional Guidance Focusing on Leucine Intake During Cardiac Rehabilitation Maintenance

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  • KAWAKUBO SAKI
    Graduate School of Health and Sports Science, Juntendo University
  • FUKAO KOSUKE
    Graduate School of Health and Sports Science, Juntendo University Department of Cardiovascular Biology and Medicine, Juntendo University Graduate School of Medicine
  • SOMEYA YUKI
    Graduate School of Health and Sports Science, Juntendo University
  • NISHIMURA JUNYA
    Cardiovascular Rehabilitation and Fitness, Juntendo University Hospital
  • DOI MAYUMI
    Cardiovascular Rehabilitation and Fitness, Juntendo University Hospital
  • SATO YUSEI
    Cardiovascular Rehabilitation and Fitness, Juntendo University Hospital
  • YOKOYAMA MIHO
    Department of Cardiovascular Biology and Medicine, Juntendo University Graduate School of Medicine Cardiovascular Rehabilitation and Fitness, Juntendo University Hospital
  • TABATA MINORU
    Department of Cardiovascular Surgery, Juntendo University Graduate School of Medicine
  • MINAMINO TOHRU
    Department of Cardiovascular Biology and Medicine, Juntendo University Graduate School of Medicine
  • NAITO HISASHI
    Graduate School of Health and Sports Science, Juntendo University

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<p>Objective Due to the lack of information on the effects of nutritional guidance focused on leucine intake in patients undergoing maintenance cardiac rehabilitation, this study investigated on plasma leucine concentrations, lean body mass, and muscle strength.</p><p>Methods Nutritional guidance, focused on leucine (intervention group) or general nutritional guidance (control group), was provided for six months to patients participating in cardiac rehabilitation. Body composition, grip strength, hematological test results, and diet of both groups were compared before and after the intervention.</p><p>Results Seven patients in the intervention group (53.2 ± 18.2 years) and 7 patients in the control group (58.6 ± 15.3 years) were included. Dietary survey results showed that the six-month intervention significantly (p < 0.05) increased protein intake and estimated leucine intake only in the intervention group. There was no significant difference in the rate of change in plasma leucine concentration between the two groups. The rate of change in lean body mass was significantly higher in the intervention group compared to the control group (p = 0.035). The rate of change in plasma leucine concentration and that in lean body mass was positively correlated only in the intervention group (r = 0.777, p = 0.040), and the rate of change in plasma leucine concentration was also positively correlated with the rate of change in grip strength (ρ = 0.857, p = 0.014).</p><p>Conclusions In the patients undergoing maintenance cardiac rehabilitation, increased plasma leucine concentration by nutritional guidance focused on leucine increased lean body mass without any increasing the training load.</p>

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