This study applied a 10-week dynamic stabilization training (DST) program using water-based inertial load to 15 healthy adult men. The effects on hip, knee, and ankle joint moments during the stabilization phase after single-leg landing and directional change were examined using three-dimensional motion analysis and ground reaction force measurement.

This study examined the effects of water-based inertial load dynamic stability training (DST) on dual-task performance and postural control during stair walking in healthy older women aged 65 and above. The findings confirm its effect on improving functional stability and mobility in older adults, and explore its potential as an intervention strategy for fall prevention.

This study examined position-specific hamstring morphology and its association with lower-extremity function in university rugby players. Hamstring size differed by playing position, with CTB players showing particularly high relative hamstring volume.

This randomized controlled trial compared elastic and inelastic barbell conditions within a 12-week unilateral leg training program. Changes in dynamic balance, center of pressure (COP), and muscle activity (EMG) were compared and analyzed over the intervention period.

Scrummaging in rugby union is a contact event in which two formations of eight forwards engage and drive against each other to contest ball possession. Successful scrummaging requires players to respond rapidly and synchronously to the engagement call, coordinate pack alignment, and apply high forward force throughout the drive. However, timing and force characteristics of scrummaging remain poorly understood, with existing evidence largely confined to laboratory or scrum-machine settings and limited by small samples. This study proposes an acceleration-based method, using wearable IMUs, to assess individual- and pack-level temporal coordination and impact loading across 62 scrums from 4 matches. The approach enables objective and non-disruptive player comparisons and pack-level performance evaluation in the match-play setting.

Drawing on practical experience coaching more than 3,000 youth athletes (junior and senior high school students) through the mobile and studio-based training service Suportal, this presentation introduces an approach for simultaneously addressing errors commonly observed during the cocking–acceleration phase of throwing and batting motions. Using training grounded in the Constraints-Led Approach, this coaching practice has led to tangible results, including the development of multiple 150 km/h pitchers each year and a batter who recorded multiple home runs in a single Koshien tournament under the new bat regulations.

This presentation addresses a rehabilitation case in which a dynamic knee valgus pattern emerged after lateral meniscus anterior horn repair, interpreted as a coordination strategy arising from the interaction between altered joint sense following injury and whole-body movement constraints. Through STC-based rehabilitation, the potential for recovery in function and performance, beyond pain reduction alone, was examined.

This presentation addresses an intervention case in which STC training was applied in a general fitness setting to restore knee joint function. Grounded in the Constraints-Led Approach and Ecological Dynamics theory, it examines the effect of progressive perturbation training on dynamic knee stability and performance.

This presentation compares traditional training and STC-based training in relation to the sport-specific movements required in American football, such as acceleration/deceleration, directional change, and postural control. It presents training application methods tailored to different game situations.

Both sports require quick decision-making and agility within a confined court. At the same time, differences in goal placement and in the body part used to handle the ball create distinct movement constraints between the two. This presentation extracts the movement characteristics of each sport and describes training tailored to each.

Self-organization is not confined to a specific body region; rather, it is a fundamental principle embedded throughout nature and the human body. This presentation illustrates this concept by drawing parallels between natural phenomena and human tissues, and demonstrates it through the phenomenon of “dissociation between tissue and neural responses” observed in MyotonPRO and electromyographic (EMG) data collected during STC training.

This presentation reinterprets STC training from the perspective of rehabilitation and motor learning, proposing a coordination-based approach to functional movement recovery. In particular, it examines methods for enhancing movement adaptability and coordination through motor task design using Task and Intent, along with the manipulation of diverse environments and conditions. Building on this, the presentation proposes practical directions for applying STC in clinical and sports rehabilitation settings.

Functional elastomer films are being utilized as materials for electrodes, sensors, and wiring to develop on-skin monitoring devices capable of measuring biological information directly from the body. These devices provide a moderate, supporter-like fit and can flexibly adapt to body movements. Therefore, they are expected to operate stably even at locations that are difficult to measure with conventional sensors or during intense exercise accompanied by perspiration. In this presentation, we introduce simple and reliable methods for measuring surface electromyography (sEMG), force, acceleration, and other signals while the device remains attached to the skin, from a materials-science perspective that considers factors such as the physical properties of elastomers and conductive polymers and film thickness. This approach enables the acquisition of information on muscle activity at the fingertips, palms, and limbs, as well as the forces applied to various body regions. We will also discuss the current status and challenges associated with measurements in underwater environments.