My name is Dirk and I'm 57 years old. I've been mountain biking for almost 20 years. I tore my hamstrings 2 years ago and until Dana's BioSync treatment, I was in chronic pain and unable to ride even short flat distances on the streets. The hamstrings would "lock-up" every time. After a few BioSync sessions, Dana asked me to start "testing" the injury. I've been riding several weeks now and have not experienced the "lock-up" since. I'm looking forward to now doing what I love again! Thank you Dana!!