TY JOUR TI Mobile hardware-software tools for the assessment and development of speed-strength qualities in cross-country skiers: opportunities and prospects KW skiing KW speed-strength preparedness KW sports biomechanics KW kinematic parameters of movements KW dynamic parameters of movements JO Scientific notes of P. F. Lesgaft University AU Tolokova, M.P. PY 2026 IS 0 PB National State University of Physical Education, Sports and Health named after P.F. Lesgaft