H.I.I.T. running x 4 intervals tonight

Weighed in at 188 today. My right thigh muscles were complaining hard tonight during the High Intensity part of my runs. I'm not sure if I just didn't stretch well enough last night or if I'm still recouping from Tuesdays H.I.I.T. run. I may have to put two days between each H.I.I.T. run.