Energy Metabolsim Characteristics in Different Modes of Sprint Speed Endurance Training

Objective: To compare the energy metabolism characteristics in different modes of sprint speed endurance training. Methods: The blood lactate (BLA) and energy metabolism levels of 14 well-trained sprinters (age: 18.57 ± 2.56 yrs, height: 181.00±5.16 cm, weight: 68.00±6.45 kg, training yrs: 6.35±2.92 yrs, 200 m PB: 22.19±1.06 sec) in the four SET modes (i.e., HV-1, HV-2, HI-1 and HI-2) were obtained and analyzed with a portable blood lactate analyzer and a portable gas analyzer, respectively. The sprinters' energy supply profiles in these four SET modes were calculated and compared according to their oxygen uptake (VO2) , BLA and the fast component of the excess post-exercise oxygen consumption (EPOC) . Results: The energy supply from the ATP-CP system in HV-1, HV-2, HI-1 and HI-2 modes were 217.35±43.78 k J, 206.15±25.49 kJ, 117.10±18.79 kJ and 120.31±19.10 kJ, respectively. The energy supply form the glycolytic system in HV-1, HV-2, HI-1 and HI-2 modes were 77.13±8.88 kJ, 99.74±16.64 kJ, 81.75±8.23 kJ and 95.47±8.46 kJ, respectively. The energy supply from the aerobic system in HV-1, HV-2, HI-1 and HI-2 modes were 155.62±27.16 kJ, 172.05±37.12 kJ, 56.04±14.17 kJ and 55.62±15.52 kJ, respectively. Conclusion: Different speed endurance training modes have different energy metabolism characteristics, the grouping pattern was a key factor affecting the proportion of anaerobic glycolytic systems involved in energy supply, double-set modes (HV-2 and HI-2) were more effective than single-set modes (HV-1 and HI-1) in enhancing athletes' speed endurance. The athletes were recommended to develop their speed endurance mainly by performing HV-2 mode during the general preparation phase, and the HI-2 mode can be used to develop their speed endurance during the special preparation phase.