Jun 17

Corredores con lumbalgia / Low back and lower-limb muscle performance in male and female recreational runners with chronic low back pain

#corredores #lumbalgia #chronic low back pain #runners
#electromyography #isokinetic strength #rehabilitative ultrasound image

Fuente 
Este artículo es originalmente publicado en:
http://www.ncbi.nlm.nih.gov/pubmed/25899213
http://www.jospt.org/doi/abs/10.2519/jospt.2015.5460?url_ver=Z39.88-2003&rfr_id=ori%3Arid%3Acrossref.org&rfr_dat=cr_pub%3Dpubmed&#.VYJFZfl_Oko
http://www.anatomia-fisioterapia.es/33-systems/musculoskeletal/spine/lumbar/1196-corredores-con-lumbalgia
De:
Cai C1, Kong PW.
J Orthop Sports Phys Ther. 2015 Jun;45(6):436-43. doi: 10.2519/jospt.2015.5460. Epub 2015 Apr 21.
Todos los derechos reservados para:
©2015 Journal of Orthopaedic & Sports Physical Therapy


Abstract

Study Design Controlled laboratory study, cross-sectional. Objective To compare lumbar extensor muscle fatigability, lumbar stabilizing muscle activation, and lower-limb strength between male and female runners with chronic low back pain (LBP) and healthy runners. Background Little is known about muscle performance in runners with chronic LBP. Methods Eighteen recreational runners with chronic LBP (9 men, 9 women; mean age, 27.8 years) and 18 healthy recreational runners (9 men, 9 women; mean age, 24.6 years) were recruited. The median frequency slopes for bilateral iliocostalis and longissimus were calculated from electromyographic signals captured during a 2-minute Sorensen test. The thickness changes of the transversus abdominis and lumbar multifidus between resting and contraction were measured using an ultrasound scanner. Peak concentric torques of the bilateral hip extensors, hip abductors, and knee extensors were measured using an isokinetic dynamometer at 60°/s. The average values for both sides were used for statistical analysis. Results When averaged across sexes, peak knee extensor torque was 12.2% lower in the LBP group compared to the healthy group (mean difference, 0.29 Nm/kg; 95% confidence interval: 0.06, 0.53; P = .016). Male runners with chronic LBP exhibited smaller lumbar multifidus thickness changes compared to healthy male runners (mean difference, 0.13 cm; 95% confidence interval: 0.01, 0.25; P = .033). No other group differences were observed. Conclusion Runners with chronic LBP exhibited diminished knee extensor strength compared to healthy runners. Male runners with chronic LBP demonstrated additional deficits in lumbar multifidus activation. J Orthop Sports Phys Ther 2015;45(6):436-443. Epub 21 Apr 2015. doi:10.2519/jospt.2015.5460.

KEYWORDS:

electromyography; isokinetic strength; muscle activation; rehabilitative ultrasound image
PMID:

 

25899213

 

[PubMed – in process]

Corredores con lumbalgia

La prevalencia de la lumbalgia (LBP) en corredores aficionados se ha descrito en un 13,6% en USA, representando aproximadamente el 7% de todas las lesiones relacionadas con la carrera. Se conoce poco respecto al rendimiento muscular en corredores con LBP crónico. El objetivo del siguiente estudio fue comparar la fatiga de la musculatura extensora lumbar, la activación muscular lumbar, y la fuerza del miembro inferior entre corredores masculinos y femeninos con LBP crónico y corredores sanos.
18 corredores con LBP crónico se emparejaron con 18 individuos libres de dolor. Se midieron las señales EMG sobre el iliocostal durante el Test de Sorenson de 2 minutos, mientras un ecógrafo medía los cambios en el grosor del transverso abdominal y el multífido lumbar. Un dinamómetro isocinético midió la fuerza de la musculatura del miembro inferior.
En los corredores con LBP solo se redujo el pico de torque extensor de rodilla y el grosor del multífido lumbar, este último solo entre hombres. Estos hallazgos sugieren la posibilidad de muchas otras variables como potenciales culpables tras la LBP en corredores ocasionales, como la técnica de carrera y los errores en el entrenamiento.
> De: Cai et al., J Orthop Sports Phys Ther (2015) (Publ. antes de impresión). Todos los derechos reservados: the Journal of Orthopaedic & Sports Physical Therapy. Pincha aquí para acceder al resumen de Pubmed.. Traducido por Francisco Jimeno Serrano.