Muscle Imbalances – The front of your hips, your hip flexors, are the muscles that will tighten and shorten while you are sitting for hours each day. While you are sitting, the back of your hips, your glutes and your hip extensors, are being overstretched. But just because they are being tightened and stretched respectively, doesn’t benefit either of them. They are also being weakened because of the lack of use of each muscle group.
Grade II (moderate): A larger tear in your muscle that makes it difficult to move and causes a moderate amount of pain, especially when you move the affected muscle, swelling, and tenderness. You may have 5 percent to 50 percent loss of function and you may be limping. You can't go back to sporting activities until the tear is completely healed. These injuries can take anywhere from a couple weeks to a few months to heal, depending on how bad they are.