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Published on: March 23, 2019
Jogging gait kinetics following fatiguing lumbar paraspinal exercise
Joseph M Hart1, D Casey Kerrigan, Julie M Fritz
1Department of Orthopaedic Surgery, University of Virginia, 400 Ray C. Hunt Drive, Suite 330, Box 800159, Charlottesville, VA 22908-0159, USA. joehart@virginia.edu
Summary
Lumbar paraspinal muscle fatigue alters hip and knee joint moments during jogging. Individuals with low back pain history exhibit greater knee flexion moments, suggesting altered quadriceps reliance.
Area of Science:
- Biomechanics
- Neuromuscular Physiology
- Sports Medicine
Background:
- Lumbar paraspinal muscle fatigue is linked to altered quadriceps activation.
- Understanding the impact of lumbar fatigue on lower extremity joint mechanics during dynamic activities like jogging is crucial.
Purpose of the Study:
- To investigate changes in hip and knee joint moments during jogging after lumbar paraspinal fatiguing exercise.
- To compare these changes between individuals with and without a history of low back pain.
Main Methods:
- Fifty participants (25 with low back pain history) underwent isometric lumbar extension exercise to induce fatigue.
- Three-dimensional external hip and knee joint moments during jogging were assessed using motion analysis before and after fatigue.
Main Results:
- Fatiguing lumbar exercise led to reduced knee flexion, adduction, internal rotation, and hip external rotation moments.
- Increased external knee extension moments were observed post-fatigue.
- Individuals with low back pain history demonstrated larger knee flexion moments during jogging compared to controls.
Conclusions:
- Isolated lumbar paraspinal fatiguing exercise induces neuromuscular changes affecting lower extremity joint moments during jogging.
- Individuals with a history of low back pain may exhibit altered movement strategies, potentially relying more on quadriceps activity.
