title: Immediate and lasting improvements in weight distribution seen in baropodometry following a high-velocity, low-amplitude thrust manipulation of the sacroiliac joint.
abstract: The biomechanics of the sacroiliac joint makes the pelvic segment responsible for proper weight distribution between lower extremities; however, it is known to be susceptible to altered mobility. The objective of this study was to analyze baropodometric responses following thrust manipulation on subjects with sacroiliac joint restrictions. Twenty asymptomatic subjects were submitted to computerized baropodometric analysis before, after, and seven days following sacroiliac manipulation. The variables peak pressure and contact area were obtained at each of these periods as the average of absolute values of the difference between the right and left foot based on three trials. Data revealed significant reduction only in peak pressure immediately after manipulation and at follow-up when compared to pre-manipulative values (p < 0.05). Strong correlation was found between the dominant foot and the foot with greater contact area (r = 0.978), as well as between the side of joint restriction and the foot with greater contact area (r = 0.884). Weak correlation was observed between the dominant foot and the foot with greater peak pressure (r = 0.501), as well as between the side of joint restriction and the foot with greater peak pressure (r = 0.694). The results suggest that sacroiliac joint manipulation can influence peak pressure distribution between feet, but contact area does not seem to be related to the biomechanical aspects addressed in this study.
authors.affiliation: Physical Therapy Program, College of Health Sciences, Methodist University of Piracicaba, Rodovia do Açúcar, Km 156 Campus Taquaral, Piracicaba, SP, Brazil.
authors.forename: Daniel de Oliveira
authors.initials: Dde O
authors.lastname: Grassi
authors.forename: Marcial Zanelli
authors.initials: MZ
authors.lastname: de Souza
authors.forename: Silvia Belissa
authors.initials: SB
authors.lastname: Ferrareto
authors.forename: Maria Imaculada de Lima
authors.initials: MI
authors.lastname: Montebelo
authors.forename: Elaine Caldeira de Oliveira
authors.initials: EC
authors.lastname: Guirro
mesh_terms: D000328:Adult; D001696:Biomechanical Phenomena; D001835:Body Weight / Q000502:physiology*; D018592:Cross-Over Studies; D005260:Female; D006801:Humans; D008297:Male; D020393:Manipulation, Spinal; D026741:Physical Therapy Modalities; D012446:Sacroiliac Joint / Q000502:physiology*; D055815:Young Adult