Since posture is of great importance in pernosal health & social life,so evaluation of prevalence of  foreward head posture in school children of adolesent age seems necessary for proper prevention planning and treatment.the present study is an analytic-descriptive on 480 students(240 girls and 240 boys) from Shiraz high school in 1999.the subjects were selected according to clusture random sa...

Spectral analysis of continuously measured joint angles using an electrogoniometer was considered as a potentially efficient method for quantifying exposure to physical stress in repetitive manual work. The method was previously demonstrated in the laboratory but has not yet been tested extensively in the field. Spectral analysis was compared against observational analysis, consisting of time-a...

STUDY DESIGN A blinded, randomized controlled trial was conducted. OBJECTIVE To test the hypothesis that chiropractic side-posture manipulation (adjusting) of the lumbar spine separates (gaps) the zygapophysial (Z) joints. SUMMARY OF BACKGROUND DATA Spinal adjusting is thought to gap the Z joints, yet no studies have conclusively validated this hypothesis, and some investigators have report...

Cadaveric lumbar intervertebral joints were loaded to simulate the erect standing posture (lordosis), and the erect sitting posture (slightly flexed). The results show that, after the intervertebral disc has been reduced in height by a period of sustained loading, the apophysial joints resist about 16 per cent of the intervertebral compressive forces in the erect standing posture, whereas in th...