I’m a 60 year old female who’s been running for 30+ years and I’ve had some knee issues lately. I started seeing Clint a few weeks ago and he’s been great!!! My favorite is his antigravity treadmill…I’m hooked!!! First time I’ve been able to run in months and on top of that there’s no pain, awesome speed, and hardly any fatigue. BEST THING EVER!!! Please try Clint and ask to give his treadmill a try…you’ll be amazed!!!