I am 60+ and have arthritis in my neck & back. At my request, Dr D never snaps or crunches, etc. He uses deep muscle massage, heat, mild electric stimulation and adjusts my vertebrae with a gentle vibrating/thumping device. Never uncomfortable. Best adjustments I've ever had. Would recommend 110%. Occasionally I have to wait 30 min if he has taken an emergency, but most often I wait a few minutes. And I have been the patient he "fit into his schedule" after someone ran into me at a stop sign, so I never mind waiting.