Sounds like a pretty strange reaction to some smashing the day following a WOD. Dehydration definitely could be a huge component in this response if you did not rehydrate well after your WOD. Best results for working on sliding surfaces/smashing is to do it immediately after your WOD. 10-15 minutes worth of smashing following your WOD on the muscles that you used predominately in those movements is recommended. This also will help you down regulate following an intense training session and help improve your recovery while you are sleeping.