Within the framework of pilot study, we tested effect of running outfit with compressive technology EXO SENSIFIT on running performance according to mid-term endurance and selected physiological parameters through quasi-experiment. Four probands completed within one week two identical exercise tests, one in standard running clothes, second one in sportswear EXO Sensifit (Calf, pants and shirt). Test vita maxima was conducted on treadmill, the initial speed was set at 11.5 km / h-1, with increasing speed of 0.5 km / h-1 every 200 meters and inclination 1°. Cardiorespiratory parameters and duration of the test were assessed. We did not notice significant distinction in any physiological parameter. There was an obvious distinction in the duration of the test. Nevertheless, this could be also added to incorporation or placebo-effect.