The 37-year-old fell from his horse during a training session, injuring his back and putting him out of the saddle for eight weeks - meaning he will miss the selection events in July.
An MRI scan revealed he had fractured three vertebrae and crushed a fourth.
"The news came as quite a shock. It's just uncomfortable to ride," he said.
"I never dreamed it could be broken. I thought I must have sprained it as I'm able to carry on with life pretty much as normal."
Although the fractures are stable and Pearson expects to make a full recovery, he has been advised not to ride to allow everything time to heal.



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