Muscle-Specific Endurance of the Lower Back Erectors Using Electrical Twitch Mechanomyography
| Autor: | T. Bradley Willingham, Sahil V. Patel, Caio Moraes, Max Green, Kevin K. McCully |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
medicine.medical_specialty
Histology lcsh:Diseases of the musculoskeletal system near infrared spectroscopy neuromuscular electrical stimulation Physical Therapy Sports Therapy and Rehabilitation Stimulation Wrist Article 03 medical and health sciences 0302 clinical medicine Rheumatology Internal medicine medicine Erector spinae muscles Back pain Orthopedics and Sports Medicine humans reproducibility Reproducibility muscle fatigue fatigability Muscle fatigue business.industry Healthy subjects Skeletal muscle 030229 sport sciences medicine.anatomical_structure Cardiology Anatomy medicine.symptom lcsh:RC925-935 business 030217 neurology & neurosurgery |
| Zdroj: | Journal of Functional Morphology and Kinesiology; Volume 4; Issue 1; Pages: 12 Journal of Functional Morphology and Kinesiology Journal of Functional Morphology and Kinesiology, Vol 4, Iss 1, Pp 12-0 (2019) |
| ISSN: | 2411-5142 |
| DOI: | 10.3390/jfmk4010012 |
| Popis: | Lower back pain is a common symptom potentially associated with skeletal muscle dysfunction. The purpose of this study was to evaluate endurance in the lower back muscles of healthy participants using accelerometer-based mechanomyography. Methods: Young healthy subjects (N = 7) were tested. Surface electrodes and a tri-axial accelerometer were placed over the erector spinae muscle along the T11⁻L1 Vertebrae. Stimulation was for 3 min each at 2, 4, and 6 Hz, and changes in acceleration were used to calculate an endurance index (EI). Reproducibility of the endurance index measurements was tested on two separate days. Wrist flexor and vastus lateralis muscles were tested for comparison. Near Infrared Spectroscopy (NIRS) was used to measure muscle oxygen levels (O2Hb) (N = 5). EI was 70.3 + 13.4, 32.6 + 8.4, and 19.2 + 6.2% for 2, 4, 6 Hz, respectively. The coefficients of variation were 9.8, 13.9, and 20.3% for 2, 4, 6 Hz, respectively. EI values were lower in the erector spinae muscles compared to the arm and the leg (p < 0.05). O2Hb values were 86.4 + 10.9% at rest and were 77.2 + 15.5, 84.3 + 14.1, and 84.1 + 18.9% for 2, 4, 6 Hz, respectively (p > 0.05, all comparisons). An endurance index can be obtained from the lower back erectors muscles that is reproducible and not influenced by voluntary effort or muscle oxygen levels. |
| Databáze: | OpenAIRE |
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