I wouldn't worry about it, but if you are feeling sore at all I would recommend a good protein shake with some glutamine and amino acids for a faster recovery. Typically for your body to fully repair your muscles is about 24-48 hours depending on the damage it occurred during the workout and how big the muscle is. Since the legs are the biggest muscle in the body it does take a little bit longer. But if your not soar then it seems like you are in shape, continue what you are doing.