One possible solution...
Walking can help hip joint aching. I used to have it every morning. then when i started walking about 3-5 miles twice a week the aching hip joint thing went away. Stopped walking for a month, it came back. Started walking again, no hip pain. So now walking is part of my exercise plan, along with biking, gardening, and dancing.

the reason walking helps hips joints more than biking is because when walking vigorously, you extend your leg BACK behind your butt. you never do that while seated on a bike. Range of motion is what its all about. Like the old saying..."Move it or lose it".