1.Uphill Treadmill Trudges
I see you, walking on that treadmill incline, trying to make those #BootyGains. But, girl, this type of workout is doing no favors for your lower back, and the stress on your hammies can create an aggressive amount of strain in your lumbar region.
A good alternative here is to try the StairMaster instead of the treadmill. The use of your quadriceps and hip girdle muscles will protect your spine, and your lower back will thank you for it.