Objective of the study was to rate and analyze the skate skiing stride (quadriceps femoris push-off phase) energy efficiency with/ without programmed dynamic electrical myostimulation. Methods and structure of the study. We sampled for an experiment 20.3±0.5 year-old 69.4±1.6 kg heavy and 179.6±2.6 cm tall skilled ski racers (n=6) tested with sub-maximal oxygen consumption = 69.4±3.2 ml/ kg/ min rated by Cosmos Venus treadmill. The training workload protocol was complemented by a synchronized gas exchange test data generated by Cortex MetaLyzer II-R2 gas analyzer and processed by Metasoft 3 software. The athletes, upon a prior warm-up, were tested with/ without programmed dynamic electrical myostimulation while running the treadmill on ski rollers at 3 m/s with the run angles varying from 4% to 10%; and with the heart rate read by Polar H10 M-XXL pulsometer system. Results of the study and conclusions. It was found that the economical efficiency, estimated by oxygen consumption per meter of track with programmed dynamic electrical myostimulation, was 6.3-4.7% higher than during the usual movement. Distance pulse with programmed dynamic electrical myostimulation (meters covered per a tick of the blood) was 2.2-5.2% higher. It is discussed that the increase in RE was due to the redistribution of the muscle electrical activity and the improvement of the biomechanics of the skating stroke. The study data and analyses showed that the programmed dynamic electrical myostimulation method may be highly beneficial for the instant energy efficiency improvement purposes in the modern skate skiing sport, with the energy efficiency and distance heart rate recommended as highly informative tests rates applicable in the endurance, technical progress and muscle control/ relaxation tests.
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