SCL — RESEARCH
Research
Exploring "Conditioning" to Maximize Human Performance
SCL — PHILOSOPHY
"Sports Science through Experience, Trials, and Contribution"
We emphasize field experience, conduct scientifically-based trials, and contribute findings to society.
Field Experience
Focusing on field realities such as cognitive decline after training and long-term stress accumulation
Acute Fatigue
Elucidating mechanisms of transient cognitive fatigue
Chronic Fatigue
Long-term stress assessment through hair hormone analysis
Performance
Integrating findings to achieve scientific conditioning
Field Experience
Focusing on field realities such as cognitive decline after training and long-term stress accumulation
Acute Fatigue
Elucidating mechanisms of transient cognitive fatigue from exercise
Chronic Fatigue
Developing long-term stress assessment through hair hormone analysis
Performance
Integrating findings to achieve scientific conditioning

SCL — RESEARCH THEME 01
Elucidating Fatigue Mechanisms
Understanding How Exercise Affects the Brain
We have demonstrated that VR exercise improves working memory and positive mood, and we are developing new technology to predict brain fatigue states from facial expression changes during exercise.
Currently, we are working to elucidate the common physiological factors of peripheral and central systems underlying cognitive and brain fatigue.
SCL — RESEARCH THEME 02
Conditioning Assessment &
Performance Optimization
From Chronic Fatigue Visualization to Athlete Support
Our laboratory was the first in the world to demonstrate that hair cortisol and oxytocin can serve as physiological indicators of training stress and psychological states in female athletes.
We are also verifying practical findings such as mental health assessment using heart rate variability (HRV) and performance enhancement effects through facial expression control.
RESEARCH ATHLETES
University Student Athletes · Japanese National Wheel Gymnastics Athletes · Women's Basketball Top League Players · High School Club Athletes

SCL — PUBLICATIONS
Research Achievements
Major Publications
01Elucidating Fatigue Mechanisms
Facial Lower-Region Changes During High-Intensity Exercise as Predictors of Reduced Arousal State
Journal of Sports Sciences
DOI ↗Cognitive decline with Pupil Constriction Independent of subjective fatigue during prolonged esports across player expertise levels
Computers in Human Behavior
DOI ↗Foam Rolling Intervention Improves Lactate Clearance After High-Intensity Exercise
Sports
DOI ↗Cognitive fatigue due to exercise under normobaric hypoxia is related to hypoxemia during exercise
Scientific Reports
DOI ↗Hypoxia-induced lowered executive function depends on arterial oxygen desaturation
The Journal of Physiological Sciences
DOI ↗02Conditioning Assessment & Performance
Integrating Heart Rate Variability and Hair Hormone Monitoring for Athlete Wellness: Practical Insights from a 22-Month Self-Monitoring Case Study
Research Square (preprint)
DOI ↗Changes in Hair Cortisol and Oxytocin Independently Associate with Positive and Negative Psychological States in Female Soccer Players
Frontiers in Sports and Active Living
DOI ↗Pitch Selection Ability and Spatial Executive Function Independently Predict Baseball Batting Performance
Sports
DOI ↗Exercising with virtual reality is potentially better for the working memory and positive mood than cycling alone
Mental Health and Physical Activity
DOI ↗Hair cortisol is a physiological indicator of training stress for female footballers
European Journal of Applied Physiology
DOI ↗The Potential of Heart Rate Variability Monitoring for Mental Health Assessment in Top Wheel Gymnastics Athletes: A Single Case Design
Applied Psychophysiology and Biofeedback
DOI ↗The Effects of Acute Virtual Reality Exergaming on Mood and Executive Function
JMIR Serious Games
DOI ↗PROJECTSOngoing Research Projects
Elucidating the Physiological Mechanisms of Cognitive Fatigue Targeting Prefrontal Cortex Lactate Elevation and Establishing Scientific Prevention Strategies
Japan Society for the Promotion of Science · Grant-in-Aid for Scientific Research (B)
Establishing Chronic Stress Assessment Using Hair Cortisol for Physical Activity Promoting Healthy Development
Japan Society for the Promotion of Science · Grant-in-Aid for Challenging Research (Pioneering)
Imaging the Vulnerability of Cerebral Cortical Microvascular Function to Hypoxia and Elucidating Its Cytohistological Basis
Japan Society for the Promotion of Science · Grant-in-Aid for Scientific Research (B)
PI: Atsuhiro Tsubaki
Development of a System to Enhance Self-Conscious Problem-Solving Strategies of Physical Education Teachers
Japan Society for the Promotion of Science · Grant-in-Aid for Scientific Research (C)
PI: Yasuyuki Nishihara
High-Sensitivity Comprehensive Analysis of Hair Lipids Using MALDI-TOF/MS and Its Application to Long-Term Mental Fatigue Assessment
Japan Society for the Promotion of Science · Grant-in-Aid for Scientific Research (C)
PI: Kenji Nakayama
For detailed research achievements, please visit researchmap
For Those Interested in Our Laboratory
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