Running with a stroller is definitely harder. I was jogging on a different program of trying to get to 5k in just 30 days. I got to 8 minutes of jogging before hurting myself from pushing too hard. Now starting all over with this app... I can tell it's harder cause when my husband runs with me I'll make him push the stroller and I feel like I could jog forever without it! But it'll make you stronger in the long run for sure!! My husband regularly does 5ks but he gets exhausted when using the stroller... so when I get to the point of doing 5ks... I'll be stronger than him!