In this second part of our series on CrossFit related back pain, Sam teams up with Marc Keen from CrossFit Roppongi to discuss the opposite type of issue - extension sensitive lower back pain. To see the videos, head over to our instagram page: https://www.instagram.com/p/DRn-qQ5EkJo/?igsh=Y3JmMTB1MW9jY3U= #lowerback #crossfit #physiotherapy #physiotherapist #physicaltherapy #physicaltherapist #training #strengthtraining