So, I normally run early in the morning while my kids sleep. My 8 yr old dd and I are signed up for a 5k in a few weeks. A lot of relatives are running b/c we a redlining it in honor of a family member. Any way, strollers are allowed. I have a 2 and 4 year old and a double jogging stroller.my question is- how much harder will it to be to run pushing the stroller? They prob weigh 70lbs combined. I'll be going slower than normal any way as my 8 year old will be running with me! Thanks for any input!