Reply To: CardioHome › Forums › 40 Day Buns & Guns Challenge 2023 › Nutrition › Cardio › Reply To: Cardio March 27, 2023 at 4:13 pm #522955 MaureenModeratorSherry Lynn Penney wrote:Just wondering if it would be OK to just walk on the threadmill? The reason bring is because I have a bad knee..That’s just fine.