4 miles around a different part of my neighborhood I barely run on. Felt fine, except my breathing which has been off. Not sure if it is from taking off and just being out of shape, or possibly doing core and pushups right before I run. My guess is I am just not aerobically fit yet. If it still happens this time next week, I will begin doing core after I run. Core and pushups before. Stretching, rolling, hips after. (Using hurdle drills as hips tag).