Having good core strength is important! I love that this has various types of plank moves!
Lower back exercises to relieve soreness and pain
Free 100 No-Equipment Workouts A complete collection of visual routines for all fitness levels with detailed instructions, a manual and a training guide. download http://neilarey.com/100-no-equipment-workouts.html
Fitness workouts that don't need any equipment by Neila Ray | iLyke