Welcome to our Waltham Clinic, located inside the Waltham Athletic Club (WAC), 249 Lexington St. This location enjoys free parking and full use of the athletic club during your scheduled appointment times. The WAC has a full-service gym, an 83 degree pool and tennis courts. Back On Track has all-day access to the pool for our aquatherapy patients. This location is not ideal for patients with lower extremity disabilities. Please visit us in Bedford or Newton if you have difficulty with stairs.