00808naa#a2200193#i#450# EN\\bibl\123939 20260708032706.3 1994-4683 20260707b2026####ek#y0engy0150####ca RU Intensity of competitive loads in highly qualified cross-country skiers in races of various formats and distances Journal article Moscow National State University of Physical Education, Sports and Health named after P.F. Lesgaft 2026 7 с. Journal article local Северный бег на лыжах. Лыжные гонки на длинные дистанции. 796.922 Novikova Natalia Borisovna Ivanova Inna Georgievna Belyova Anna Nikolaevna uchzapiski.lesgaft.spb.ru