The purpose of this study was to determine the influence of posture on ventilatory muscle strength a&d ej-123 and on lung function.Maximum static inspiratory pressures (MIPS), maximum static expiratory pressures (MEPS) and lung function measurements (FVC, FEV1, PEFR) were obtained in three different body positions in 57 normal subjects and in 16 asthmatic patients.Statistical analysis of the data obtained showed that changes in ps5 price new jersey position influence the ventilatory muscle function and lung function values.The sitting lean forward and the sitting erect positions were the better positions in the normal group.The findings revealed that the sitting lean forward position was the optimum position for the asthmatic group (p 0,001).