Using the Self-rating Inventory of Athletes’ Psychological Characteristics and Mental Skills, the author made an all-round investigation, analysis and evaluation of the 27 young volleyball players’ psychological characteristics and mental skills. Psychological intervention of relaxation training, biofeedback training, Image training and group guidance was implemented for eight weeks. The result shows that the relaxation, self-regulation, interpersonal communication, emotional stability and motivation intensity of athletes are at a relatively low level. The effect of psychological intervention is significant. After the intervention, the athletes’ self-adjusting ability, psychological preparation level and motivation level are improved significantly. And the abdominal breathing and biofeedback training can greatly improve athletes’ relaxation ability. Their respiratory frequency is reduced distinctly. The time-domain indexes reflecting psychological variation of HRV(SDNN, RMSSD and PNN50) increase significantly. HF is improved evidently, while LF and LF/HF are reduced significantly. |