The Bertec Fully Instrumented Treadmill v5 (FIT5) allows gait researchers to reduce laboratory space requirements and remove the limitations inherent in a traditional force plate walkway. The unique design features result in superior dynamic characteristics and a high natural frequency making it the preferred research-grade fully instrumented treadmill. The Bertec treadmill enables walking and running research with speeds up to 11.5 m/s and six-component force data output at 1000 Hz.