Depends on what the workout was each time. Two heavy days close together tends to mess with my tendons. If I ever do a lagging muscle group twice in a week, I make sure one day is for heaviness and nerve stimulation, and the next is high rep dropset growth hormone and bloodflow stimulation. Two high rep days close together, and you won't see a lot of fiber anabolism. Two heavy rep days close together and you might pay Mr. Tendinitis a visit for a few days.