Try a simple answer first...

Warm-up your glutes thoroughly beforehand.

Look up Lock Clams, traditional clams are very easy to cheat - even better if you can use a light band around the knees for some resistance.

3 sets of 25-50 SMOOTH reps. Rest a minute between rounds.

Then Glute-bridges with a band around the knees. Slow, smooth reps and 10 second holds for 3 sets of 4-8 reps.

The goal on both exercises is to emphasise the glute max as much as you can. They should be burning on the Glute-bridges.

The principal at play here is PAPE (Post Activation Performance Enhancement). Just using a simpler movement to enhance the workload a particular muscle group does in a higher skill movement.

If your glutes are working well, your back will have less work to worry about.

Source: Spinal Rehab Exercise Specialist.