Roller-massager application to the hamstrings increases sit-and-reach range of motion within five to ten seconds without performance impairments.

Background: Foam rollers are used to mimic myofascial release techniques and have been used by therapists, athletes, and the general public alike to increase range of motion (ROM) and alleviate pressure points. The roller-massager was designed to serve a similar purpose but is a more portable device that uses the upper body rather than body mass to provide the rolling force.

Objectives/purpose: A roller massager was used in this study to examine the acute effects on lower extremity ROM and subsequent muscle length performance.