The aim of this research was to optimize the diagnosis of the physical abilities of alpine skiing skiers before and after the ski period. The sample consists of six different specialities of skiers – students of Athens University at periods 2009 - 2015 (n = 56). The following eight tests on the dry terrain were used before and after the ski period, in two consecutive days: 30m flight start, “octuple” jump, Slalom, Jumping up and down the step, Balance in slope on the one leg, Balance on both legs, “Dips” on the parallel bars, run 1000m and 600m for the men and women respectively. The statistical analysis included “t–test” for dependent samples and correlation analysis (a = 0.05). The results of this research were the following: the four of eight tests presented improvement to men’s physical fitness after the ski period: eight continuous jumps, balance in slope on the right leg, slalom and run 1000m. While, women improved at: balance in slope on the right leg, “dips” on the parallel bars, balance on both legs and run 600m. There was a significant improvement to the total and mixed team of men and women at the 6 from the 8 tests.