The Effects of Intensity on Exercise-Induced Hypoalgesia During a Knee Extension Exercise

The primary purpose of this study is to to compare immediate changes in pressure pain threshold at the exercising muscle (quadriceps) and a non-exercising muscle (upper trapezius) during low and high weight knee extension exercise. Participants will attend one session that consists of pain sensitivity testing, completion of pain-related psychological questionnaires, and random assignment to one of three interventions: 1) knee extension exercise with a high weight, 2) knee extension exercise with a low weight, or 3) quiet rest.