I won a tough singles 3-setter on Sunday and decided to go for a 45-minute walk after. It was a nice day and I just wanted to soak in the glory of victory a bit . These days I'm usually quite sore the day after a 3-setter on a hard court. But I woke up today and there is only mild soreness. Did my walk somehow help? What's going on there? PS - I always stretch for 5-10 minutes after a match, but usually still feel sore. Maybe this walk is really the key?