THE EVALUATION AND COMPARISON OF THE PHYSICAL CHARACTERISTICS OF THE COLLEGE BOXING PLAYERS WITH/WITHONT LOW BACK PAIN / 体力科学

ABSTRACT

The purpose of this study is to evaluate physical characteristics of boxing players with/without low back pain (LBP). Materials and methods: 18 college boxing players were divided into two groups ; The first group consisted of eight subjects with LBP (LBP group), the other one consisted of ten subjects without LBP (no LBP group). The evaluation items were as follows muscular strength of trunk extension/ flexion/ rotation, cross-sectional areas of the muscles of the lumber region, X ray photograph of lumber spine, MRI, general joint laxity test, muscle tightness test, muscle hardness, tenderness and moiré topography. Results: 9 out of 18 subjects showed lumber region abnormalities in their X ray photograph and MRI. The following evaluation items of LBP group read significant differences compared to those of no LBP group ; The trunk rotator peak torque was weaker at the angular velocity of 120 deg/sec, the laterality of SLR was significantly larger, while the finger floor distance value indicated significantly lower. Discussion: In LBP group, it is suggested that the decline of trunk flexion muscle strength possibly preceded the fall of trunk extension muscle strength which, however, was not observed.