Cathe, first of all let me congratulate you on your announcement of your new arrival. Also, I bought all five of the new videos and love them all. My question to you or anyone out there who might know this anwer is - I have arthritis in my knees. When I do a lot of lunges or reverse lunges, my knees are screaming. Someone told me that squats work basically the same muscles. I have incorporated all squats for lunges and it has not bothered my knees, problem is I'm worried that I might not be getting the full benefit. The person who told me this is no expert. I was also told that when you place your feet further apart on a squat, you work more glut and when they are closer together, you work more quads. I'd love to hear your thoughts on this. Thanks so much and have a great weekend. Keep us posted on how you are feeling. Take care. Mary