My routine is I run almost 10 km Mon, Wed, Fri & walk 5 km Tues & Thurs. This week got screwed up because of work scheduling & I missed running on Mon. So I ran on Tues, walked on Wed, ran on Thurs. It's been a lot of years since I tried running two days in a row. The last time almost killed me. It's always been walk, run, walk, run. But today I said screw it & ran, meaning I've run two days in a row. Wasn't all that much harder running the second day in a row. I'm thinking I might start running every day. I'll try running a km of my 5 km walk day. Anybody have experience running every day?