in the middle week 6

Normally this week I have to run:
tue: 3 miles
wed: 5 miles
thur: 3 miles
sat: 7 miles

Already ran on tuesday, and my legs felt like they were made out of steel (5 laps in the park).
On wednesday, I ran 8 laps in the park and it felt better.
Anyway, as I didn't really ran my whole distance last weekend, I thought about running the 10 miles again on saturday instead of the 7 miles. Also, I'm gonna run it in the park as well. It's gonna be boring, but the surface is not as hard as the road, so it will be better for my legs, since normally it's a set-back weekend.