I was in the same pattern. As I begin to coach more, I kept hearing, "Be an athlete." I was simply a runner and developed many imbalances. As I trained my runners, I, too, began to do basic body weight movements to become more athletic.
You may be able to find it online somewhere, but it's called, "Runners Hundred." It's focused on lower body and your goal is 25 reps of each. There are 4 exercises, hence the name hundred. I could only get 10-12 reps the first time and it makes you focus on each leg. I also include some upper body movement (presses/basic movements).
The 4 exercises are: single leg bridge, single leg calf raise, side leg lifts, and single leg rise (similar to pistol squat).
The single leg rise/pistol squat was the most challenging and the one that I feel benefited me the most. I put a bench under my butt in the event that I fell to the ground. You may also hold onto bands to assist you going down. Week by week, I got stronger and I felt that primary weaknesses (right side) began to get stronger.
Hope this helps.