The article presents data on the effective building of strength training for middle distance runners in the autumn - winter macrocycle. It was revealed that the conjugated-sequential form of organizing loads of various predominant directions provides for a strict procedure for introducing loads into the process of training athletes with a gradually increasing degree of specificity and strength of the training influence. It was determined that in the six-month training cycle for middle-distance runners aged 13-14 years-old, the conjugated-sequential form of organizing loads with the element of concentration of strength loads has a more beneficial effect on the dynamics of the level of motor training than the complex-parallel one.