The Unlock Your Hip Flexors program will definitely help with your hip impingement. Many people with hip impingement or femoroacetabular impingement (FAI) experience tightness in a muscle group called the iliopsoas. These muscles located in the front of your hips help to bend your hip up, and tightness here may be one cause of the pinching feeling you get in the front of your hip when sitting or bending your hip with FAI.
Stretching your hip flexor muscles may be one important component of your FAI exercise program. It is also important that you begin with resting the affected hip and modifying your activities to avoid moving the joint in a way that causes pain.
In relation to your osteoarthritis, the exercises included in the Unlock Your Hip Flexors program are not strenuous and are designed to be carried out by anyone, regardless of ability. If you have osteoarthritis please be advised that Osteoarthritis symptoms can usually be effectively managed, although the underlying process cannot be reversed. Staying active, maintaining a healthy weight and other treatments may slow progression of the disease and help improve pain and joint function. The program can help in a way but up to what extent it can help with Osteoarthritis nothing is for certain.