The effect of a controlled mandible position mouthguard on upper body strength and power in trained rugby athletes - A randomized within subject study.

Background: It is widely accepted that mouthguards are effective for injury protection in sports. However, findings on the effects of mouthguards in strength and power production remains controversial. Therefore, the aim of this study was to determine whether controlled-mandible position mouthguards influence strength and power production in well trained athletes.