YOUR LOWER BACK ROUNDS
As you approach the bottom of your squat, your tailbone tucks under, creating a curve in your spine. Experts have dubbed it “butt wink” (funny) – and over time, it can lead to a disc herniation (not-so funny).
Tight hip flexors prevent your pelvis going deeper, so your spine steps in to help tilt it backwards. Another common culprit: sucking in rather than bracing your abs, which throws your back into a flexed position.
Stretch your hip flexors at least twice a day: Stand and hold one knee, then the other, into your chest for one minute. For abdominal stability, practise bracing your abs through various planks, like forearm or side plank.