Validity and Reliability of Gait and Jump Parameters Measured by the iSen Device in Healthy Adults

Condition(s) studied

Study summary

This study aims to evaluate the validity and reliability of gait and jumping parameters measured with the iSen device in healthy adults. Gait analysis is a valuable tool for assessing general health, cognitive performance, quality of life, and mortality. It is commonly used by clinicians to assess functional limitations resulting from neurological or orthopedic conditions and to guide treatment plans. Traditional gait assessments primarily focus on walking speed, but additional parameters such as step length, step time, and gait symmetry are crucial for a comprehensive analysis.

The study will also assess vertical jump performance, which is a surrogate measure of explosive lower limb strength and is commonly used in sports performance and injury prediction. The iSen device, a wearable and affordable sensor, will be compared to the validated BTS G-Walk system to evaluate the accuracy and consistency of its measurements. Participants aged 18-35 with no history of musculoskeletal, neurological, or systemic conditions will be included.

The study will be conducted at Gazi University and Kırıkkale University, where participants will undergo assessments of gait and jump performance using both iSen and BTS G-Walk devices. A test-retest reliability protocol will be employed with a seven-day interval between measurements. The results will provide evidence on the suitability of the iSen device for reliable and valid gait and jump measurements in clinical settings

Eligibility

Primary outcome measure(s)

• Gait Speed — Baseline and 1 week later
  Gait speed (m/s) will be measured using the iSen system at baseline and one week later. At baseline, measurements will also be collected using the BTS G-Walk system for comparison to determine the validity of the iSen device in healthy adults.
• Cadence — Baseline and 1 week later
  Cadence (steps/min) will be measured using the iSen system at baseline and one week later. At baseline, BTS G-Walk measurements will be used for validity comparison.
• Step Length — Baseline and 1 week later
  Step length (m) will be measured using the iSen system at baseline and one week later. At baseline, BTS G-Walk measurements will be used for validity comparison.
• Stance Phase Duration — Baseline and 1 week later
  Stance phase duration (%) will be measured using the iSen system at baseline and one week later. BTS G-Walk will be used at baseline for validation.
• Step Time — Baseline and 1 week later
  Step time (s) will be measured using the iSen system at baseline and one week later. BTS G-Walk will be used at baseline for comparison.
• Swing Phase Duration — Baseline and 1 week later
  Swing phase duration (%) will be measured using the iSen system at baseline and one week later. BTS G-Walk will be used at baseline for validation.
• Double Support Phase Duration — Baseline and 1 week later
  Double support phase duration (%) will be measured using the iSen system at baseline and one week later. BTS G-Walk will be used at baseline for validation.
• Single Support Phase Duration — Baseline and 1 week later
  Single support phase duration (%) will be measured using the iSen system at baseline and one week later. BTS G-Walk will be used at baseline for validation
• Pelvic Angles — Baseline and 1 week later
  Pelvic angles (degrees) will be measured using the iSen system at baseline and one week later. BTS G-Walk will be used at baseline for validation
• Jump Height — Baseline and 1 week later
  Jump height (cm) will be measured during a countermovement jump using both the iSen and BTS G-Walk systems at baseline, and only the iSen system one week later. The highest value from three jumps will be recorded.
• Take-off Force — Baseline and 1 week later
  Take-off force (kN) during a countermovement jump will be measured with the iSen and BTS G-Walk systems at baseline, and with iSen only one week later. The trial with the highest value will be analyzed.
• Maximum Concentric Power — Baseline and 1 week later
  Maximum concentric power (kN) during a countermovement jump will be measured using both iSen and BTS G-Walk systems at baseline, and only iSen at one week. The value from the best trial will be used for analysis.
• Landing Impact Force — Baseline and 1 week later
  Landing impact force (kN) will be assessed using both the iSen and BTS G-Walk systems at baseline, and the iSen system only at one-week follow-up.
• Maximum Jump Velocity — Baseline and 1 week later
  Maximum vertical velocity (m/s) during a countermovement jump will be measured using the iSen and BTS G-Walk systems at baseline, and only iSen one week later. The maximum value from three trials will be recorded.
• Take-off Velocity — Baseline and 1 week later
  Take-off velocity (m/s) will be assessed during a countermovement jump using both the iSen and BTS G-Walk systems at baseline, and only iSen at 1-week follow-up. The highest value will be selected.

Trial sites (1)

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