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0919.2017

2017/09/13 Akiho Ikutomo is Graduate Student in Sport and Health Science, and her research manuscript was accepted in European Journal of Sports Science.


The study revealed that inserted long rest periods between repeated sprint exercise promoted training adaptations in competitive athletes.

 

Ikutomo A, Kasai N, Goto K. Impact of Inserted Long Rest Periods during Repeated Sprint Exercise on Performance Adaptation. Eur J Sports Sci, 2017 (In press)


0915.2017

2017/09/11 Professor Kazushige Goto published a research article in Applied Physiology, Nutrition, and Metabolism.


The study revealed that hepcidin (iron regulating hormone) elevation after repeated sprint exercise was not different between hypoxic condition and normoxic condition.

 

Kazushige Goto, Nobukazu Kasai, Chihiro Kojima, Aya Ishibashi

Post-exercise serum hepcidin response to repeated sprint exercise under normoxic and hypoxic conditions. Appl Physiol Nutr Metab, 2017 (ahead of print)


0907.2017

2017/09/06 Dr. Hayato Tsukamoto is Senior researcher in Research Organization of Science and Technology, and his research manuscript was accepted and published in PLoS One.


 Dr. Hayato Tsukamoto is a Senior researcher in Research Organization of Science and Technology of Ritsumeikan University, and his research, which collaborated with Professor Tadao Isaka, Professor Takeshi Hashimoto, and Assistant Professor Tadashi Suga in Faculty of Sport and Health Science of Ritsumeikan University, was accepted and published in PLoS One. In this study, we revealed that inhibitory control (i.e., executive function of the brain) could be improved immediately after knee extension resistance exercise, especially with high-intensity. Therefore, we propose that, in addition to whole-body resistance exercise and aerobic exercise, localized resistance exercise that is performed by recruiting limited muscle groups may be sufficient for improving inhibitory control.

 

Tsukamoto H, Suga T, Takenaka S, Takeuchi T, Tanaka D, Hamaoka T, Hashimoto T, and Isaka T (2017). An acute bout of localized resistance exercise can rapidly improve inhibitory control. PLoS One, Vol.12(9): e0184075.

 

http://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0184075&type=printable


0904.2017

2017/08/22 Professor Kazushige Goto published a research article in PLOS ONE.


 

The study revealed that endurance exercise-induced hepcidin (iron regulating hormone) elevation was not different between hypoxic condition and normoxic condition.

 

Kazushgie Goto, Daichi Sumi, Chihiro Kojima, Aya Ishibashi

Post-exercise serum hepcidin levels were unaffected by hypoxic exposure during prolonged exercise sessions. PLOS ONE, 12 (8): e0183629, 2017.


0901.2017

2017/8/28 Aya Ishibashi is Graduate Student in Sport and Health Science, and her research manuscript was received an Encouragement Award in the 72nd Japanese Society of Physical Fitness and Sports Medicine.


Aya Ishibashi is Graduate Student in Sport and Health Science of Ritsumeikan University, and her research manuscript was received an Encouragement Award in the 72nd Japanese Society of Physical Fitness and Sports Medicine in Ehime.  

 

Aya Ishibashi, Hiroto Sasaki, Saori Matsumiya, Aoi Ikedo, Aya Kaizaki, Takafumi Hamaoka, Kazushige Goto, Kumiko Ebi (2016). Influence of four weeks of n-3 polyunsaturated fatty acid supplementation on fat metabolism during prolonged exercise. The Japanese Journal of Physical Fitness and Sports Medicine, 65 (2) p.225-235.


0901.2017

2017/7/30 Aya Ishibashi is Graduate Student in Sport and Health Science, and her research manuscript was accepted in Nutrients.


Aya Ishibashi is Graduate Student in Sport and Health Science of Ritsumeikan University, and her research manuscript was accepted and published in The Journal of Nutrients, which collaborated with Professor Kazushige Goto. The study revealed that effect of three consecutive days of endurance training (twice daily) on the hepcidin level, iron regulated hormone. Subjects were assigned to either an iron treatment group or a placebo group. On days 4, the iron treatment group showed significantly higher hepcidin level compared with day1. The present findings may suggest even a moderate dose of iron supplementation during endurance training may not be a recommendable treatment to improve physical condition in athletes.

Aya Ishibashi, Naho Maeda, Akiko Kamei, Kazushige Goto. Iron Supplementation during Three Consecutive

Days of Endurance Training Augmented Hepcidin Levels. Nutrients. 2017, 9, 820.


0830.2017

2017/07/06 Nobukazu Kasai is Graduate Student in Sport and Health Science, and his research manuscript was accepted in International Journal of Sports Medicine.


Nobukazu Kasai is Graduate Student in Sport and Health Science of Ritsumeikan University, and his research manuscript was accepted in International Journal of Sports Medicine, which collaborated with Professor Kazushige Goto. The study shows significant improvement of power output during maximal sprint test following short-term (5 days) sprint training in hypoxia among competitive sprint runners. The present findings suggest that short-term sprint training in hypoxia causes further improvement of sprint performance among competitive sprint runners.

Nobukazu Kasai, Chihiro Kojima, Daichi Sumi, Hideyuki Takahashi, Kazushige Goto, Yasuhiro Suzuki. Impact of 5 Days of Sprint Training in Hypoxia on Performance and Muscle Energy Substances. International Journal of Sports Medicine, 2017 (In press)


0829.2017

2017/05/31 Sahiro Mizuno is Graduate Student in Sport and Health Science, and her research manuscript was accepted in PLOS ONE.


      Sahiro Mizuno is Graduate Student in Sport and Health Science of Ritsumeikan University, and her research manuscript was accepted and published in PLOS ONE, which collaborated with Professor Kazushige Goto. The study revealed that wearing a lower body compression garment exerting 15 mmHg significantly attenuated decrease in jump performance than that with wearing a lower body compression garment exerting 30 mmHg. Furthermore, exercise-induced increases in HR and the inflammatory response were significantly smaller with compression garment exerted 15mmHg than that with garment exerted < 5 mmHg.

 

Sahiro Mizuno, Mari Arai, Fumihiko Todoko, Eri Yamada and Kazushige Goto. PLOS ONE, 2017; 12 (5): e0178620


0829.2017

2017/08/01 Ms. Chihiro Kojima is Graduate student of SHS, and her research manuscript was accepted and published in Journal of Strength and Conditioning Research.


Ms. Chihiro Kojima is graduate student of Sport and Health Science of Ritsumeikan University, which collaborated with Professor Kazushige Goto. The study revealed that high-intensity interval exercise under hypoxic and normoxic conditions lowered plasma ghrelin concentrations and subsequent energy intake.

 

Chihiro Kojima, Nobukazu Kasai, Aya Ishibashi, Yukako Murakami, Kumiko Ebi and Kazushige Goto. (2017) Appetite regulations after sprint exercise under hypoxic condition in female athletes. Journal of Strength and Conditioning Research. [Epub ahead of print]


0828.2017

2017/07/31 Michio Wachi is Graduate Student in SHS, and his research manuscript was accepted and published in Kyoto and Shiga journal of physical education, health and sport sciences.


 Michio Wachi is Graduate Student in Faculty of Sport and Health Science of Ritsumeikan University, and his research manuscript was accepted and published in Kyoto and Shiga journal of physical education, health and sport sciences, which collaborated with Professor Tadao Isaka. The purpose of this study was to reveal a lack factor that can be conceived from a psychological and nutritional science point of view for athletes who have undergone an operational surgery. The study revealed that the psychological and nutritional status of the postoperative athletes were required to be grasped and approached in order to early return to the sport.


0613.2017

2017/5/17 M.S. Kohei Kido is Graduate Student in Faculty of SHS, and his research manuscript was accepted and published in American Journal of Physiology-Regulatory, Integrative and Comparative Physiology.


 M.S. Kohei Kido is Graduate Student in Faculty of Sport and Health Science of Ritsumeikan University, and his research manuscript was accepted and published in American Journal of Physiology-Regulatory, Integrative and Comparative Physiology, which collaborated with Professor Satoshi Fujita in Faculty of Sport and Health Science of Ritsumeikan University. The study revealed blood insulin concentration regulated acute resistance exercise-induced AMPK pathway activation and AMPK-dependent gene expression. Moreover, the study suggested that AMPKα Ser485/491 phosphorylation is one of the regulatory factors of this mechanism.

 

Kohei Kido, Takumi Yokokawa, Satoru Ato, Koji Sato, Satoshi Fujita. Effect of resistance exercise under conditions of reduced blood insulin on AMPKα Ser485/491 inhibitory phosphorylation and AMPK pathway activation. (2017) Am J Physiol Regul Integr Comp Physiol. May.


0524.2017

2017/05/18 Dr. Mitsuo Otsuka is Associate Professor in Faculty of SHS, and his research manuscript was accepted and published in Frontiers in Psychology.


Dr. Otsuka Mitsuo is Associate Professor in Faculty of Sport and Health Science of Ritsumeikan University, and his research manuscript was accepted and published in Frontiers in Psychology, which collaborated with Professor Tadao Isaka, and Associate Professor Toshiyuki Kurihara. This study examined the effect of variable timing of reaction signals on multiple joint reaction times and whole-body RT for specialist sprinters.  Whole-body RT was significantly shorter when FP length was longer; the values of whole-body RT were 117 ± 5 ms, 129 ± 5 ms, 125 ± 4 ms, 133 ± 6 ms, and 156 ± 8 ms in the 2.096, 1.938, 1.780, 1.622, and 1.465-s FP-length conditions, respectively.  This information will be able to lead to new methods for start signals in sprint running events.

 

Otsuka M., Kurihara T., Isaka T. (2017) Timing of gun fire influences sprinters’ multiple joint reaction times of whole body in block start. Frontiers in Psychology. 8(81).

http://journal.frontiersin.org/article/10.3389/fpsyg.2017.00810/full

0424.2017

2017/04/23 A research assistant, Dr. Atsuki Fukutani published an original article in Frontiers in Physiology.


A research assistant, Dr. Atsuki Fukutani with cooperation of a graduate student, Jun Misaki and Prof. Tadao Isaka published an original article in Frontiers in Physiology. In this study, we confirmed that force generating capability of muscle increases briefly by active stretch in human plantar flexion. Because this muscle characteristic would contribute to the force enhancement by stretch-shortening cycle which is frequently used in sport movement, better understanding of this phenomenon would lead to improvement of sports performance.

 

Fukutani A, Misaki J, Isaka T. (2017). Influence of joint angle on residual force enhancement in human plantar flexors. Front. Physiol. 8:234. doi: 10.3389/fphys.2017.00234.


0414.2017

Mr. Naoki Horii, is a Graduate Student in Faculty of Sports and Health Science of Ritsumeikan University, and his research manuscript was accepted and published in Am J Physiol Regul Integr Comp Physiol, which collaborated with Professor Motoyuki Ie


 Mr. Naoki Horii, is a Graduate Student in Faculty of Sports and Health Science of Ritsumeikan University, and his research manuscript was accepted and published in Am J Physiol Regul Integr Comp Physiol, which collaborated with Professor Motoyuki Iemitsu, Professor Takeshi Hasimoto, Professor Izumi Tabata, Assistant Professor Masataka Uchida. The study revealed that 6-week combination of high-intensity intermittent exercise training and chlorella intake accelerates exercise performance and muscle glycolytic and oxidative capacity in rats.

 

Horii N, Hasegawa N, Fujie S, Uchida M, Miyamoto-Mikami E, Hashimoto T, Tabata I, Iemitsu M. High-intensity intermittent exercise training with chlorella intake accelerates exercise performance and muscle glycolytic and oxidative capacity in rats. (2017) Am J Physiol Regul Integr Comp Physiol. 312(4): R520-R528.


0411.2017

2017/04/11 Dr. Masahiro Fujimoto, Assistant Professor in College of SHS, published a research paper in Journal of Biomechanics.


Dr. Masahiro Fujimoto, Assistant Professor in the College of Sport and Health Science, published a research paper in the Journal of Biomechanics, co-authored with Dr. Woei-Nan Bair and Dr. Mark Rogers at the University of Maryland School of Medicine. An impaired ability to control lateral balance is an important aspect of balance problems contributing to falls, and an inability to recover lateral balance with a single step has been reported to be predictive of future falls in older adults. This paper demonstrated that although reduced balance stability at first foot contact could be a determinant of taking additional steps as previously reported, stepping responses (i.e., single vs. multiple steps) could also be attributable to the balance stability as early as first step lift-off, preceding foot contact. The findings of this study would be useful in developing training interventions effective for fall prevention.

http://www.sciencedirect.com/science/article/pii/S0021929017301100

Fujimoto M, Bair W-N, and Rogers MW. (2017). Single and multiple step balance recovery responses can be different at first step lift-off following lateral waist-pull perturbations in older adults. Journal of Biomechanics, 55: 41-47.


0404.2017

2017/04/01 Dr. Hayato Tsukamoto is Post-doc in Research Organization of Science and Technology, won the Early Career Investigator Travel Bursary on the 28th International Symposium on Cerebral Blood Flow, Metabolism, and Function (BRAIN & BRAIN PET 2


 Dr. Hayato Tsukamoto is a Postdoctoral Fellow in Research Organization of Science and Technology of Ritsumeikan University, and his research, collaborated with Professor Takeshi Hashimoto in Faculty of Sport and Health Science of Ritsumeikan University, Professor Shigehiko Ogoh in Department of Biomedical Engineering of Toyo University, and Professor Niels H. Secher in Department of Anesthesia of the Copenhagen Muscle Research Centre, Rigshospitalet, and University of Copenhagen (Denmark), is awarded in the Early Career Investigator Travel Bursary on the 28th International Symposium on Cerebral Blood Flow, Metabolism, and Function (BRAIN & BRAIN PET 2017) in Berlin.


0404.2017

2017/04/01 Dr. Hayato Tsukamoto is Post-doc in Research Organization of Science and Technology, and his research manuscript was accepted and published in Medicine & Science in Sports & Exercise.


 Dr. Hayato Tsukamoto is a Postdoctoral Fellow in Research Organization of Science and Technology of Ritsumeikan University, and his research, collaborated with Professor Takeshi Hashimoto, Professor Tadao Isaka, and Assistant Professor Tadashi Suga in Faculty of Sport and Health Science of Ritsumeikan University, was accepted and published in Medicine & Science in Sports Exercise. In this study, we revealed that post-exercise executive function improvement could be prolonged after higher volume exercise, especially higher intensity, compared to lower volume exercise. This finding suggests that application of an optimized protocol based on exercise volume may be beneficial for improving cognition, and can also be useful for developing effective exercise protocols for improving human health.

 

Tsukamoto H, Takenaka S, Suga T, Tanaka D, Takeuchi T, Hamaoka T, Isaka T, and Hashimoto T (2017). Impact of Exercise Intensity and Duration on Postexercise Executive function. Med Sci Sports Exerc, Vol.49(4): pp.774-784.


https://www.ncbi.nlm.nih.gov/pubmed/27846044

0327.2017

2017/03/24 A research assistant, Dr. Atsuki Fukutani published an original article in Frontiers in Physiology.


A research assistant, Dr. Atsuki Fukutani with cooperation of a graduate student, Jun Misaki and Prof. Tadao Isaka published an original article in Frontiers in Physiology. In this study, we confirmed that force generating capability of muscle decreases briefly by active shortening in human plantar flexion. Our findings contribute to a better understanding of the mechanism of human movements.

 http://journal.frontiersin.org/article/10.3389/fphys.2017.00183/full

Fukutani A, Misaki J, Isaka T. (2017). Force depression in plantar flexors exists equally in plantar flexed and dorsiflexed regions. Front. Physiol. 8:183. doi: 10.3389/fphys.2017.00183.


0327.2017

2017/03/22 A research assistant, Dr. Atsuki Fukutani published an original article in Scientific Reports.


A research assistant, Dr. Atsuki Fukutani with cooperation of a graduate student, Jun Misaki and Prof. Tadao Isaka published an original article in Scientific Reports. This study examined the validity of the estimation method to evaluate the Achilles tendon length changes during human movements, and pointed out the problem which should be solved in the future. By overcoming this problem, a better examination for evaluating the Achilles tendon length changes can be performed.

http://www.nature.com/articles/s41598-017-00485-1

 

Fukutani A, Misaki J, Isaka T. (2017). Relationship between joint torque and muscle fascicle shortening at various joint angles and intensities in the plantar flexors. Scientific Reports. 7. 290. doi:10.1038/s41598-017-00485-1.


0321.2017

2017/02/27 Yuto Miyake is Graduate Student in Faculty of Sport and Health Science, and his research manuscript was accepted and published in European Journal of Applied Physiology.


Yuto Miyake is Graduate Student in Faculty of Sport and Health Science of Ritsumeikan University, and his research manuscript was accepted and published in European Journal of Applied Physiology, which collaborated with Professor Tadao Isaka, Professor Akinori Nagano, Assistant Professor Tadashi Suga, and Assistant Professor Mitsuo Otsuka.

The study revealed that the knee extensor moment arm is greater in sprinters than in non-sprinters, and this morphological structure in sprinters is associated with sprint performance. Therefore, these findings suggest that that a greater knee extensor moment arm may be an advantageous for achieving superior sprint performance in sprinters.

Miyake Y, Suga T, Otsuka M, Tanaka T, Misaki J, Kudo S, Nagano A, Isaka T. The knee extensor moment arm is associated with performance in male sprinters. Eur J Appl Physiol 117(3): 533-539, 2017.