Brazilian Journal of Pain
Brazilian Journal of Pain
Original Article

Influence of pain in strength, resistance and recruitment of trunk muscles

Influência da dor na força, resistência e recrutamento dos músculos do tronco

Guilherme Thomaz de Aquino Nava; Beatriz Mendes Tozim; Mary Hellen Morcelli; Marcelo Tavella Navega

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BACKGROUND AND OBJECTIVES: Changes in motor control may contribute to muscle recruitment deficits. The objective of this study was to evaluate strength, endurance, and recruitment of the torso muscles.

METHODS: We evaluated 35 women, divided into two groups: chronic low back pain (LBPG, n=20) and control (CG, n=15). The clinical conditions, incapacity, level of pain, strength, endurance and the muscles recruitment: internal oblique (IO) and external oblique (EO), rectus abdominis (RA), lumbar iliocostal (LI) and lumbar multifidus (LM) were evaluated. MANOVA, MANCOVA and Kruskal-Wallis were used.

RESULTS: There was no significant difference between groups in the muscle strength test (p<0.172). The control group showed the greater capacity for muscle endurance in the muscle endurance test (p<0.001). In muscle recruitment, the chronic low back pain group presented greater muscle activation, which was evident in the global stabilizing muscles EO and RA (p<0.05).

CONCLUSION: Women with back pain had reduced muscular endurance and greater recruitment of the global muscles when compared to women with no back pain.


Electromyography, Lumbar pain, Muscle strength, Physical resistance


JUSTIFICATIVA E OBJETIVOS: Alterações no controle motor podem contribuir para déficits no recrutamento muscular. Sendo assim o objetivo deste estudo foi avaliar a força, resistência e o recrutamento dos músculos do tronco.

MÉTODOS: Foram avaliadas 35 mulheres, divididas em dois grupos: dor lombar crônica (GDL, n=20) e controle (GC, n=15). Avaliou-se as condições clínicas, incapacidade, nível da dor, força, resistência e recrutamento dos músculos: oblíquo externo (OE) e interno (OI), reto abdominal (RA), iliocostal lombar (ICL) e multífido lombar (MUL). Utilizou-se MANOVA, MANCOVA e Kruskal-Wallis.

RESULTADOS: No teste de força muscular não houve diferença significativa entre os grupos (p=0,172). O grupo controle demonstrou maior capacidade de resistência no teste de resistência muscular (p<0,001). No recrutamento muscular, o grupo dor lombar crônica apresentou ativação muscular maior, que ficou evidente nos músculos estabilizadores globais, OE e RA (p<0,05).

CONCLUSÃO: Mulheres com dor lombar apresentaram resistência muscular diminuída e maior recrutamento nos músculos globais, quando comparadas às mulheres sem dor lombar.


Dor lombar, Eletromiografia, Força muscular, Resistência física


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