Abstract: Laboratory and investory methods were employed to explore the short-term motor memory storage and precision and the relationship between them and motor learning indices. The subjects were students and sportsmen of three age groups(10, 14, 18 year-old)respectively. The results showed that: 1)The limit of short-term motor memory storage was“5±2”; Short-term motor memory storage was related to the practice frequency of the motor learning; Short-term motor memory precision was related to the accuracy of the first exercise.2)Shortterm memory storage tended to increase with age. 3)The prectice frequency of motor learning between sportsmen and unsportsmen had significant differance.

Key words: short-term motor memory, memory storage, memory precision, motor learning