A six-pack is envied by everyone, whether you're a gym-goer or prefer Pilates.
A good diet and exercise are needed to develop sculpted abs.
This generates an anterior tilt of the pelvis, causing a little lower back arch.
This arch in your lower back during lower ab activities may indicate lower back discomfort (Men's Health).
Any lower abdominal workouts that entail lying on your back might easily arch your back.
Instead, maintain your legs at an angle and press your lower back onto the floor or mat to activate your lower abs (Men's Health).