The effect of fatigue on the variability of kinematic coordination and muscle electrical activity in individuals with low back pain.

The effect of a fatigue protocol on the variability of kinematic coordination and the electrical activity of selected muscles in the lumbar, pelvic, and hip regions in individuals with and without non-specific chronic low back pain during running

Status

Recruiting

Phases

Unknown

Study type

Interventional

Source

IRCT

Registry ID

IRCT20180627040251N11

Enrollment

Registered

2025-05-31

Start date

2025-06-22

Completion date

Unknown

Last updated

2025-07-21

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Non-specific chronic low back pain.

Interventions

Intervention group: In this study, a standardized fatigue protocol based on treadmill running is used (Koblbauer protocol). Participants begin walking at a speed of 6 km/h, with the speed increasing e

Eligibility

Sex/Gender

Male

Age

20 Years to 40 Years

Inclusion criteria

Inclusion criteria: Having chronic low back pain for a duration of 6 months. No history of rehabilitation in the past 6 months. Confirmation by a physiotherapist based on having idiopathic low back pain. Age between 20 and 40 years.

Exclusion criteria

Exclusion criteria: History of accident and acute injury. Participation in rehabilitation and specialized exercises in the past 6 months.

Design outcomes

Primary

Measure	Time frame
Kinematic coordination variability:Measured using a motion capture system and the Continuous Relative Phase (CRP) parameter, representing the coordination between the lumbar, pelvic, and hip segments during running.Electromyographic activity of selected muscles:Recorded via surface electromyography (sEMG), including muscles such as the erector spinae, gluteus maximus, gluteus medius, hamstrings, and rectus femoris. This variable reflects the intensity and pattern of muscle activation before and after fatigue. Timepoint: Outcome variables will be measured at two time points:Before the fatigue protocol (pre-test)Immediately after the fatigue protocol (post-test). Method of measurement: Kinematic coordination variability is measured using an 8-camera motion capture system (Vicon) by calculating the Continuous Relative Phase (CRP) between the lumbar, pelvic, and hip segments.Electromyographic activity is recorded via wireless surface EMG (sEMG) from selected muscles, including the erector spinae, gluteus maximus, gluteus medius, hamstrings, and rectus femoris.	—

Measure

Time frame

Kinematic coordination variability:Measured using a motion capture system and the Continuous Relative Phase (CRP) parameter, representing the coordination between the lumbar, pelvic, and hip segments during running.Electromyographic activity of selected muscles:Recorded via surface electromyography (sEMG), including muscles such as the erector spinae, gluteus maximus, gluteus medius, hamstrings, and rectus femoris. This variable reflects the intensity and pattern of muscle activation before and after fatigue. Timepoint: Outcome variables will be measured at two time points:Before the fatigue protocol (pre-test)Immediately after the fatigue protocol (post-test). Method of measurement: Kinematic coordination variability is measured using an 8-camera motion capture system (Vicon) by calculating the Continuous Relative Phase (CRP) between the lumbar, pelvic, and hip segments.Electromyographic activity is recorded via wireless surface EMG (sEMG) from selected muscles, including the erector spinae, gluteus maximus, gluteus medius, hamstrings, and rectus femoris.

—

Countries

Iran (Islamic Republic of)

Contacts

Public Contacthassan sadeghi

Kharazmi University

hassan.sadeghi81@yahoo.com+98 21 2222 8001

Outcome results

None listed

Source: IRCT (via WHO ICTRP) · Data processed: Feb 4, 2026