I do not have heavy legs, but these pants (which were very comfortable for sitting and walking) would not allow me to step up two steps at a time in my house (which means that when I hike, they will always drag on my thighs and calves when I have to go up or downhill). So unfortunately they have to be returned. If you will just be walking on level ground, they should fit wonderfully.
This review was written in the old system and had content requirements that are different than reviews written today.