Hello Robbin123
A tight groin can definitely be part of the problem with hip and back problems. The low back and hips work closely together to have you functioning optimally with cycling and your everyday activities. Your body is looking for a balance of strength and flexibility for your back, hips and lower extremities. If anything is tight or weak, then you end up with dysfunction and pain.
With cycling, you are obviously in a flexed or bent forward position. This can further tighten the psoas and surrounding muscles. Therefore, it is important to stretch those muscles on a regular basis. You also want to make sure that the extension, or backward bending, is within normal limits for your spine.
Have you had your bike fit to you? There are places like BikeFit.com where therapists are trained specifically in the proper bike fit. It is important to have a physical therapist do this fitting because the PT will pay specific attention to the problem areas and determine the cause.
You can go to
www.moveforwardpt.com and then search under Find-a-PT.
Even though you may cycle many miles, you could still have certain muscles in the lower quarter, low back and legs, that may be weak. Again, this can be another part of the cause. Have the PT assess your muscle strength and then work on strengthening any weak muscles. This can often include the gluteal and thigh muscles.
With any back pain, I would also recommend that you monitor your postures, body mechanics and ergonomics. Use good support in the lumbar spine when sitting. Get up and stretch backwards and or walk around the room every 30 minutes. Make sure your computer is set up ergonomically for you, your back and your hips and lower extremities.
Hopefully, this gives you a few places to start. Remember, it is all connected and balance is key. Good luck.
Dr. Mary Ann Wilmarth