WHY IS THE LOWER BACK SO PRONE TO INJURIES?
That’s because your lower back works very hard to keep you upright and mobile. According to this 2023 study, the compressive force on the spine, specifically the fourth and fifth vertebrae in your lower back, is strikingly high.
These two bottommost vertebrae bear the brunt of your back’s load-bearing function. For instance, simply walking exerts a force that is 2.5 times your weight on your spine; if you weigh 80kg, that’s 200kg of force your back has to endure. Runners punish their backs further with six to eight times their bodyweight with each step.