KTKatsunori Tsuji
Katsunori Tsuji
*This is an algorithmically generated author record based on publicly available information.
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Research Subjects
Research Interests
Katsunori Tsuji has a total of 6 co-authors. Here are the top co-authors by number of shared publications:
- Izumi Tabata
Faculty of sport and health science, Ritsumeikan University, Kusatsu, Shiga, Japan
1 shared publication - Kenichiro Inoue
Faculty of Sport and Health Science, Ritsumeikan University, Kusatsu 525-8577, Japan
1 shared publication - Moe Oshiden
Faculty of Sport and Health Science, Ritsumeikan University, Kusatsu 525-8577, Japan
1 shared publication - Motoyuki Iemitsu
Faculty of Sport and Health Science, Ritsumeikan University, Kusatsu, Japan
1 shared publication - Naoki Horii
Japan Society for the Promotion of Science, Tokyo 102-0083, Japan
1 shared publication - Shumpei Fujie
Faculty of Sport and Health Science, Ritsumeikan University, Kusatsu 525-8577, Japan
1 shared publication
Latest Publications
- Open Access
Chlorella-Induced Increase in Cardiac Function Further Enhances Aerobic Capacity Through High-Intensity Intermittent Training in Healthy Young Men and Rats
Background: Chronic chlorella intake combined with high-intensity intermittent training (HIIT) has been shown to accelerate aerobic and anaerobic capacities in rodents. This study aimed to clarify the effects of combining chlorella intake with short-term HIIT on exercise performance in humans, and to investigate the impact of chlorella intake on cardiac adaptation. Materials and Methods: In Study 1, twelve healthy young men completed a 3-week exhaustive HIIT, comprising 6–7 bouts of 20 s of cycling on a leg ergometer at an intensity of 170% maximal oxygen uptake (O2max), with a 10 s rest between each bout, 3 days/week. They were orally administered either placebo or chlorella during the 3 weeks in a double-blinded, randomized crossover trial (RCT). In Study 2, six healthy young men were orally administered either placebo or chlorella during 4 weeks in a double-blinded, placebo-controlled RCT. We measured O2max and cardiac function (stroke volume [SV], heart rate [HR], and cardiac output [CO]) during maximal exercise. In Study 3, chlorella-induced changes in molecular markers of maladaptation of the heart were measured in healthy rats. Results: [Study 1] After each HIIT, O2max significantly increased in the placebo and chlorella groups (p < 0.05). Changes in O2max were significantly higher in the chlorella group than in the placebo group (p < 0.05). [Study 2] Changes in SV and CO during maximal exercise were significantly higher in the chlorella group than in the placebo group (p < 0.05 each), but HRmax did not change. [Study 3] Chronic chlorella intake did not change the molecular markers of pathological cardiac hypertrophy. Conclusions: Chronic chlorella intake, which improves aerobic capacity by enhancing cardiac function without causing cardiac maladaptation, combined with short-term HIIT, further enhanced aerobic capacity. Thus, the chlorella-induced increase in cardiac function may further enhance aerobic capacity through HIIT.Open AccessChlorella-Induced Increase in Cardiac Function Further Enhances Aerobic Capacity Through High-Intensity Intermittent Training in Healthy Young Men and Rats
Background: Chronic chlorella intake combined with high-intensity intermittent training (HIIT) has been shown to accelerate aerobic and anaerobic capacities in rodents. This study aimed to clarify the effects of combining chlorella intake with short-term HIIT on exercise performance in humans, and to investigate the impact of chlorella intake on cardiac adaptation. Materials and Methods: In Study 1, twelve healthy young men completed a 3-week exhaustive HIIT, comprising 6–7 bouts of 20 s of cycling on a leg ergometer at an intensity of 170% maximal oxygen uptake (O2max), with a 10 s rest between each bout, 3 days/week. They were orally administered either placebo or chlorella during the 3 weeks in a double-blinded, randomized crossover trial (RCT). In Study 2, six healthy young men were orally administered either placebo or chlorella during 4 weeks in a double-blinded, placebo-controlled RCT. We measured O2max and cardiac function (stroke volume [SV], heart rate [HR], and cardiac output [CO]) during maximal exercise. In Study 3, chlorella-induced changes in molecular markers of maladaptation of the heart were measured in healthy rats. Results: [Study 1] After each HIIT, O2max significantly increased in the placebo and chlorella groups (p < 0.05). Changes in O2max were significantly higher in the chlorella group than in the placebo group (p < 0.05). [Study 2] Changes in SV and CO during maximal exercise were significantly higher in the chlorella group than in the placebo group (p < 0.05 each), but HRmax did not change. [Study 3] Chronic chlorella intake did not change the molecular markers of pathological cardiac hypertrophy. Conclusions: Chronic chlorella intake, which improves aerobic capacity by enhancing cardiac function without causing cardiac maladaptation, combined with short-term HIIT, further enhanced aerobic capacity. Thus, the chlorella-induced increase in cardiac function may further enhance aerobic capacity through HIIT.