Walker posted on social medial the decision to withdraw from the two-woman event.
"I’m never one to give up, I always find a way to make it happen. Our team is always the ones that get back up, get back in and goes again. But as I have grown as an athlete I have also learnt when pushing through could do more harm then good.
"In preparation for the 2021 World Championship in Altenberg, Sarah and I had two rough crashes that left us feeling pretty beat up.
"This track demands respect and with not having a spare teammate and the way we were feeling we had to weigh up whether competing this weekend would bring us the results we knew we were capable of.
"So it is with a heavy heart, we have decided not to race in the two-man event this weekend. We had to think about our own health as we still have a lot that we want to achieve in the next year leading towards the 2022 Beijing Winter Olympic Games. Good luck to everyone who is competing this weekend and we will see you back next week for the Monobob event."
Walker will be back in action competing in the Monobob event at the World Championships later this week on February 13-14.
Walker is the equal world number one in Monobob after the last event in Austria, and the QAS athlete will be back in action competing at the World Championships in that event later this week on February 13-14.
IMAGE: Bree Walker and Sarah Blizzard in Winterberg earlier in the season © IBSF / Viesturs Lacis