Have you tried foam rolling? Myofascial release on a ball or foam roller?
I discovered a great resource for myofascial release about a year ago; it’s called “The Grid”. It’s a great design with varying levels of intensity depending on where you roll.
The Grid is like a foam roller, but it is much more intense, getting deep into trigger points like no other device. I especially love rolling over the hips and gluteals. You can roll on it for a while, or simply sit still on a trigger point until it releases.
You can find the grid on line, or in some local fitness stores like Twist Conditioning here in North Vancouver.
I purchased the grid to use with clients, and they really love it.
Here is a quick video on using the grid for hip and gluteus medius: