Thank You Louis for prompt response.
I guess it was not a substantial amount of walking? The reason being is that I have really felt some intense conditioning with recent long distance walking training (about 4 to 5 miles) after reading this from a Taiiji and boxing coach- http://pluguglysboxingblog.blogspot.com/2011/06/bare-knuckle-boxing-training.html
(i dont plan on any bare knuckle boxing anytime soon- LOL.
The result is similar to have done about an hour of Taijiquan or Standing gong. Strong and heavy feeling in legs and body from just walking.