A strong core is fundamental to perform your best in any activity. It's also linked to good self-esteem and and can help prevent injuries and bad posture. Make sure you switch between exercises for your lower back and your stomach muscles to create balance.
Plank to pull ins
The Mountain Climber
Start in a plank position and make sure your shoulders are lined up directly over your hands. Engage your abdominal muscles and pull your legs towards your chest. Keep looking at your stomach as you pull your legs all the way through, keeping them straight and strong. Your toes should point downwards and your legs glued together. Pull your legs all the way till your hips are stacked over your shoulders, looking like a handstand. Keep your torso stable and spine as straight as possible.
Breathe in and go slow as you move towards a plank position. Pay attention on your alignment, keeping your torso stable and head and spine in line. The intensity of this exercise can be increased by lengthening the straps and positioning your body further away from the anchor point of the bands.
Before using bands you should be able to effectively stabilize your low back with your core muscles, because these exercises are advanced.