I had a complex tear of my knee ligament, which gave me a lot of pain for the past 5 years. When I walked, my knee caved in and caused pain inside my kneecap, neck, and shoulders because I was off balance. I gave Core Performance a specific goal. That is to enable me to dance while wearing high heels for at least 2 hours because it is my social life. I now can dance for many hours wearing my 5″ heels, and my knee stopped hurting. I am physically stronger, sexier, and slimmer from all the hard-core exercises that they gave me. They gave me back my life. All the Core Performance staff are nice. John Kwon is a hand-on owner who keeps all his clients happy.