Effects of Inertial Load of Water on Lower Limb Joint Moments During Landing and Cutting

Ja Yeon Lee

Status: Completed

Conditions: Physical Fitness; Healthy Volunteers; Lower Extremity

Treatments: Behavioral: Dynamic Stability Training with Inertial load of water

Study type: Interventional

Funder types: Other

Identifiers

NCT07117617

BUFS-DST-2025

Details and patient eligibility

About

This study examined whether a 10-week dynamic stability training program using water-filled equipment could improve joint control and postural stability during landing and directional changes.

Twenty-six healthy young men were randomly assigned to either a training group, which performed water-based exercises, or a control group, which did not receive any intervention.

All participants performed a landing followed by a 90-degree cutting task, and joint moment data were collected using a 3D motion capture system.

The study aimed to determine if water-based perturbation training enhances neuromuscular control and reduces biomechanical stress during complex movements.

Full description

The purpose of this study was to investigate the effects of dynamic stability training using the inertial load of water on lower limb joint moments and postural control during landing and subsequent 90-degree directional changes. Rapid deceleration and cutting movements are known to generate high biomechanical loads on the lower extremities, especially during transitions from the non-dominant to dominant leg. Enhancing neuromuscular control in these situations may help reduce injury risk and improve movement efficiency.

A total of 26 healthy male participants in their 20s were recruited and randomly assigned to either an experimental group (n = 13) or a control group (n = 13). The experimental group completed a 10-week training program using water-filled bags designed to induce dynamic perturbation and promote balance and joint control. The control group did not undergo any training intervention during the same period.

All participants performed a standardized movement task consisting of single-leg landing followed by a 90-degree cutting maneuver. A 3D motion capture system and force plates were used to collect data on joint moments and biomechanical responses during both the landing and change-of-direction phases. Pre- and post-intervention data were compared to determine the effectiveness of the water-based perturbation training.

This study was designed to evaluate whether unstable load training can serve as an effective method for improving lower extremity biomechanics and dynamic stability in young adults.

Enrollment: 26 patients

Sex: Male

Ages: 20 to 29 years old

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

• Healthy adult males aged 20-29 years
• No history of musculoskeletal injury or surgery in the past 6 months
• No neurological or balance disorders
• Right-leg dominant

Exclusion criteria

• Participation in any other structured training program during the study period
• Any current or chronic pain affecting physical activity
• Use of medications that affect balance or neuromuscular control

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: None (Open label)

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26 participants in 2 patient groups

Inertial load of water Training

Experimental group

Description:

Participants in this group performed dynamic stability training using a water-filled bag (AquaBag) for 10 weeks to improve lower limb Joint moments during landing and cutting tasks.

Treatment:

Behavioral: Dynamic Stability Training with Inertial load of water

Control

No Intervention group

Description:

Participants in this group did not receive any training intervention during the 10-week study period.