The nerves are compressed and people then experience the symptoms of pain, weakness, and numbness. Other conditions, such as spinal stenosis, spondylolisthesis, or piriformis syndrome can also cause sciatica symptoms by irritating the sciatic nerve.
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Katrin Tanja Davidsdottir. In 2016, four-time CrossFit Games veteran Katrin Tanja Davidsdottir did what only two other athletes have done in the history of the CrossFit Games: win the CrossFit Games twice (Annie Thorisdottir won the Games in 2011 and 2012, and Rich Froning held the menâs title from 2011-2014).