A estabilização segmentar é muito importante em pacientes sintomáticos com hipermobilidade, quer tenham discopatia ou outras alterações. Nestes pacientes, a reeducação e reequilíbrio postural são tão ou mais importantes que o tratamento manual.
The Effect of Abdominal Stabilization Contractions on Posteroanterior Spinal Stiffness
Tasha Stanton, BSc, PT, MScRS,*† and Greg Kawchuk, DC, PhD*
Study Design. Intrasubject controls with randomized
Objective. To quantify the immediate change in posteroanterior (PA) spinal stiffness produced by different combinations of trunk muscle contraction.
Summary of Background Data.
The abdominal hollow and the abdominal brace are 2 different combinations of trunk muscle contractions that are commonly prescribed to increase spinal stability. Unfortunately, the immediate effect of these different contractions on spinal stiffness (one indicator of spinal stability) has not yet been quantified directly.
Twenty-eight asymptomatic subjects were taught abdominal hollow and brace contractions then performed them in a randomized order framed by periods of rest. Surface electromyography and B-mode
ultrasound confirmed that all contractions were performed appropriately. During each test condition (hollow, brace, and rest), a noninvasive indentation technique was used to quantify PA spinal stiffness. A repeated measures analysis of variance was used to
assess the significance of changes in the PA spinal stiffness between test conditions.
Both the abdominal hollow and abdominal brace contractions increased PA spinal stiffness significantly when compared with the rest condition (P 0.001). When the abdominal hollow and brace contractions were compared with each other, the abdominal
brace contraction produced significantly greater PA spinal stiffness (P 0.05).
In asymptomatic subjects, the abdominal brace contraction provided an immediate PA stiffening effect that was significantly greater in magnitude when compared with conditions of rest and abdominal
hollowing. These findings may allow clinicians to better match commonly prescribed contraction-based interventions with specific patient needs. Future work is required to assess the long-term effect of repeated abdominal brace and hollow contractions on PA spinal
stiffness and low back pain.