Dependence of sport performance of cross-country skiers on the mobility and stability of the joint apparatus of the lower extremities

The article is devoted to the problem of improving the sports performance of cross-country skiers. The dependence of athletic performance on the mobility and stability of the joint apparatus of the lower limbs is shown. It was found out, that the application of the stretching exercises complex in the training process of cross-country skiers increased the amplitude of movements in the hip and knee joints which had a negative influence on the movement speed and the point-rating. The strength complex for short distances (due to increased joint stability) and the combined complex for long distances (due to increased mobility of the hip and increased stability of the knee joints) had a positive effect.