running with free weights
There is no point in running with free weights. It can actually be a hinderence to your body for a few reasons.
If you train your body to run with a load, than you body will adjust to that. Point of the matter is when we normally run we do not have an external load on our bodies. Therefore we by doing that, we are falsley training our nervous system. Also, running does enough compactual damage to the joints, it doesn't make sense to add more of a load.
If your goal is to get more into distance running you could try things like, changing the incline and speed of your workouts. Basically from run to run, there should be a change in the intenstity in a way thats progressive and periodized. So after two weeks, you are more conditioned than in the beginning of those two weeks.
But dont run with weights.