International Journal of KAATSU Training Research
Online ISSN : 1882-6628
Print ISSN : 1349-4562
ISSN-L : 1349-4562
Current issue
Displaying 1-2 of 2 articles from this issue
  • Hayato Ishizaka, Yuta Mizushima, Azusa Uematsu, Mitsuki Hirota, Yoshia ...
    2021 Volume 17 Issue 1 Pages 1-6
    Published: 2021
    Released on J-STAGE: March 08, 2022

    [Purpose] The purpose of this study was to examine the respiratory and circulatory dynamics and subjective exercise intensity (RPE) during light-load resistance exercise with and without KAATSU and high-load resistance exercise without KAATSU, and to confirm the safety of KAATSU training.

    [Method] Ten adult healthy males were included in this study. The trials consisted of 15 times x 3 sets of leg extension exercises with light-load (20% 1RM) with and without KAATSU and high- load (60% 1RM) without KAATSU. We evaluated respiratory and circulatory dynamics by using breath gas analysis and cardiac output measurement, and RPE of respiratory distress and lower limb fatigue in each trial.

    [Results] The index of respiratory and circulatory dynamics was quite higher in high-load exercise than in the light-load exercise with and without KAATSU,but did not differ between with and without KAATSU in light-load resistance exercise. The RPE increased as the set progressed, and the RPE of the third set in the high-load without KAATSU was higher than in light-load resistance exercise with or without KAATSU.

    [Conclusion] Light-load KAATSU training had less physical and subjective burden because the change in respiratory circulation and RPE was lower, compared with high-load resistance exercise.

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  • Taira Fukuda, Hayato Ishizaka, Yuta Mizushima, Naohiro Nozawa, Hironag ...
    2021 Volume 17 Issue 1 Pages 7-10
    Published: 2021
    Released on J-STAGE: March 08, 2022

    The purpose of this study was to examine whether KAATSU training improves femoris quadriceps muscle brightness in postoperative patients with valvular heart disease. The subjects were five patients (65.2 ± 10.1 years old; three males and two females; two with aortic stenosis, one with aortic regurgitation, and two with mitral regurgitation) after valvular heart surgery. KAATSU training was performed twice a week for 3 months after cardiac operation, and the patients were evaluated before and 3 months after the start of training. Grip strength and knee extension strength were measured. The mid-thigh was imaged in the resting supine position using an ultrasound imaging system, and the femoris quadriceps muscle brightness was calculated using image analysis software (ImageJ). The anterior thigh muscle thickness was defined as the thickness of the rectus femoris and anterior vastus intermedius muscles in the resting supine position at the center and anterior surface of the femur. The results showed a significant increase in knee extension strength and anterior thigh muscle thickness and a significant decrease in femoris quadriceps muscle brightness (61.0 ± 14.9 vs. 55.2 ± 14.8 a.u., p = 0.049) after 3 months of training compared to before training. The results suggest that KAATSU training is effective not only for improving skeletal muscle mass but also muscle quality index.

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