In this episode we talk about a common problem for farm workers:  occupational exposure to whole body vibration, a primary risk factor for back pain.   Drs. Fred Gerr and Nate Fethke talk about what whole-body vibration is and ways to reduce exposure.  "If a machine is being used by multiple operators... then all of the operators need to pay attention to the seat suspension adjustment.  That should just be part of the checklist.  I'm on this machine, I need to set it for my weight."