Effects of Muscle Fatigue on Lumbar Stability
Author Information
Author(s): Descarreaux Martin, Lafond Danik, Jeffrey-Gauthier Renaud, Centomo Hugo, Cantin Vincent
Primary Institution: Université du Québec à Trois-Rivières, Canada
Hypothesis
Muscular fatigue of the erector spinae will lead to earlier onset of myoelectric silence during trunk flexion and delayed cessation during extension.
Conclusion
Muscle fatigue modifies the flexion relaxation phenomenon, leading to earlier onset and later cessation of myoelectric silence in healthy individuals.
Supporting Evidence
- Fatigue led to earlier onset of myoelectric silence during flexion.
- Cessation of myoelectric silence was delayed during extension after fatigue.
- Statistical analysis showed significant effects of fatigue on FRP parameters.
Takeaway
When your back muscles get tired, they don't work as well, which can make it harder to keep your back stable when bending over.
Methodology
Twenty healthy subjects performed trunk flexions under different conditions of muscle fatigue and load, with EMG data collected to analyze muscle activity.
Limitations
The study only included healthy individuals, which may limit the applicability of the findings to those with low back pain.
Participant Demographics
20 healthy adults (9 men, 11 women), average age 23.9 years.
Statistical Information
P-Value
p<0.01
Statistical Significance
p<0.01
Digital Object Identifier (DOI)
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