Influencing factors of decision-making and lower limb motor function in speed skaters

Purpose Measuring and comparing the resting-state brain functional connectivity of skaters at different levels, by comparing the differences between various indicators of high-level and low-level athletes which provides theoretical reference for beginners to improve their skill level during movement practice. Methods More than five years of high level speed skaters, low level speed skaters as the subjects, Using functional near-infrared spectroscopy (fNIRS) changes in the resting state cerebral cortex, Corresponding the spatial coordinates to the functional network, Divided into the default network (DMN), the ventral attention network (VAN), the somatomotor network (SMN) and the visual network (VN), include four functional brain networks. The knee flexion / extension moment and total work, ankle plantar flexion / dorsiflexion and valgus / varus torque and total work were tested by the isokinetic muscle strength system. Results and conclusions (1) Long-term skating training can enhance brain executive function, promote the functional connection within and between different functional networks of the brain, mainly by the sensorimotor network. (2) Long-term skating training promotes the efficiency of the cerebral cortex, which makes the information transmission and collaborative processing of the sensorimotor network more efficient, reflecting the unique benefits of skating training. (3) Speed skating squatting practice with ankle strategy to regulate posture stability, has a positive role in improving the ankle joint plantar flexion torque, the faster the joint angle speed changes, the smaller the torque change, so the appropriate slow speed is conducive to make the torque peak.