Hmmm.... if that's the case then I would have to say warming up more than you do now would help from it happening again along with more stretching. Deep tissue massages are well worth it. Rice socks (rice in a sock warmed up in the microwave for 1-2 minutes) really get the area I am targeting warmed up. Also, a hot shower before working out has gotten my heart rate going along with a fully warmed up body.