Here are a few exercises anyone can do. You don't need any equipment.
The most Important thing is to give the exercises some time to work. 
Just click on the exercises below to watch the video.
Bird dog
Bridges
Sleep walkers
DRFB
​Slight Squats
Workout #1 
5 DRFB
40 Bird dogs
5 DRFB
30 bird dogs
5 DRFB