This study aimed to determine factors related to low back pain (LBP) from changes in the physical characteristics. [Subjects] Thirteen elite junior divers who were followed from 13 to 15 years old. [Methods] The change in each item between the ages of 13 and 15 years old were analyzed by one-way analysis of variance. [Results] Significant main effects were recognized between each age of height, weight, standing long jump, vertical jump, back muscle strength, sit-ups for 30 seconds, and handstand continuance time. [Conclusion] LBP possibly occurs owing to increase in weight after 15 years old.
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