3 weeks pp can i go for walks?

hi y’all!! i’m 3 weeks postpartum and i was wondering if i can walk on my treadmill. i had a c section and the only thing that doesn’t make me stiff is walking. so when my baby is asleep can i walk at a very slow pace? i used to run my whole pregnancy and won’t be returning to that until 8 weeks pp per request of my OB.