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 from exercise

🔬

Chronic Fatigue

Developing long-term stress assessment through hair hormone analysis

🏆

Performance

Integrating findings to achieve scientific conditioning

Fatigue mechanism research — exercise experiment

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

Research with Japanese national team athletes

SCL — PUBLICATIONS

Research Achievements

Major Publications

01Elucidating Fatigue Mechanisms

2025
First & Corresponding
Facial Lower-Region Changes During High-Intensity Exercise as Predictors of Reduced Arousal State

Journal of Sports Sciences

DOI ↗
2024
Co-author
Cognitive decline with Pupil Constriction Independent of subjective fatigue during prolonged esports across player expertise levels

Computers in Human Behavior

DOI ↗
2024
Corresponding
Foam Rolling Intervention Improves Lactate Clearance After High-Intensity Exercise

Sports

DOI ↗
2022
First Author
Cognitive fatigue due to exercise under normobaric hypoxia is related to hypoxemia during exercise

Scientific Reports

DOI ↗
2018
First Author
Neural basis for reduced executive performance with hypoxic exercise

NeuroImage

DOI ↗
2018
First Author
Hypoxia-induced lowered executive function depends on arterial oxygen desaturation

The Journal of Physiological Sciences

DOI ↗

02Conditioning Assessment & Performance

2026
Corresponding
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 ↗
2026
Corresponding
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 ↗
2025
Corresponding
Pitch Selection Ability and Spatial Executive Function Independently Predict Baseball Batting Performance

Sports

DOI ↗
2024
First & Corresponding
Exercising with virtual reality is potentially better for the working memory and positive mood than cycling alone

Mental Health and Physical Activity

DOI ↗
2024
Corresponding
Hair cortisol is a physiological indicator of training stress for female footballers

European Journal of Applied Physiology

DOI ↗
2023
Corresponding
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 ↗
2022
First & Corresponding
The Effects of Acute Virtual Reality Exergaming on Mood and Executive Function

JMIR Serious Games

DOI ↗

PROJECTSOngoing Research Projects

01
PIFY2026-2029

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)

02
PIFY2025-2028

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)

03
Co-IFY2024-2027

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

04
Co-IFY2023-2026

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

05
Co-IFY2023-2026

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

Part of our research is supported by JKA

JKA Keirin and Auto Race Subsidy Project

For Those Interested in Our Laboratory

If you would like to visit or discuss, please feel free to contact us

Contact Us →