Skiing is a sport where balance and strength are critical and which can be practiced actively especially from early years to old age. The purpose of this study is to examine the effect of a 5-day training of skiing skills on dynamic balance performance and development of vertical jump strength in adolescents. Sixteen adolescent volunteers who do not regularly exercise enrolled in the study (age 13.8 [plus or minus] 0.5 years, height 160 [plus-minus] 8.5 cm, weight 56.6 [plus or minus] 10.9 kg and body mass index (BMI) 22 [plus or minus] 3.1 kg/m[superscript 2]). The subjects participated in an intensive ski training program for 5 days for a total of 20 (hours) (4 (hours) of training and 2 (hours) of free exercise). Their dynamic balance performance (on a Sport Expert MED-SP 300 balance platform) and vertical jump (strength) (New Test 2000) were measured before and after the training program. Our study shows that medial/lateral (M/L) balance improved after a 5-day ski training (p less than 0.05). However, no positive development was observed in postural balance in the anterior/posterior (A/P) plane. This study shows that repeating short-term trainings in sports branches such as skiing could have a more pronounced effect on the improvement of balance and strength.