There’s a common misconception that heavy squats and deadlifts alone provide all the core work you need. That’s wrong. If you really want to strengthen your core, you have to directly target your abdominals. When the core is weak, the lower back arches, creating a lot of strain and compression on that area. This will make you more likely to suffer from back pain while lifting weights in the gym or even just shopping bags out of the car.
Why run the risk of an injury that could put you out of training when you can spend just ten minutes at the end of your workout performing these exercises?