Before treatment and in @ days of treatment , B-PHY balance function test training system was used to determine the weight shift track parameters ( track length , peripheral square , track length of per unit square , left-right offset and rectangle square ) , the weight shift track distance parameters -LSB- mean of X axle weight shift distance ( Mean-X ) , mean of Y axle weight shift distance ( Mean-Y ) , maximum of X axle weight shift distance ( Max-X ) , maximum of Y axle weight shift distance ( Max-Y ) , weight shift distance ( LSKG ) , weight shift square ( SSKG ) , square ratio of weight shift ( LFS ) -RSB- , stability coefficient ( SI ) and weight distribution coefficient ( WDI ) .