Alexandra M hello typically bridging you would put your headrest down. However as I only did two and was on the ALLEGRO 2 reformer where the headrest has a lower position for the flow of the class I did not drop it all the way down. I would not do a whole series of hip lift and excessive exercises with the head rest up in bridge. 2 small hip lifts before we go into leg work for spinal articulation would not cause injury. If you look at my spine it looks pretty much neutral. As a student if you feel you would prefer your headrest down for two reps then please do so. Glad you enjoyed the workout!! Thank you 🙌