This study colelcted data on the maximum anterior tongue strength and endurance in 420 healthy Belgians across the adult life span to explore the influence of age, sex, bulb position, visual feedback, and order of testing. measures were obtained using the Iowa oral performance instrument (IOPI). Older participants (more than 70 years old) demonstrated significantly lower strength than younger persons at the anterior and the posterior tongue. Endurance remains stable throughout the major par of life. Gender influence remains significant but minor throughout life, with males showing higher pressures and longer endurance. The anterior part of the tonguehas both higher strength and longer endurance than the psoteriorpart. mean maximum tongue pressures in this European population seem to be lower than American values and arecloser to Asian results. The normative data can be used for objective assessment of tongue weakness and subsequent therapy planning of dysphagic patients.