Cardio before or after a workout?

If you plan on getting in a run on the same day that you hit the iron
make sure to get the strength training in first.
Strength training first is not likely going to disrupt the quality of your run.
But a run (or any ‘cardio’ or endurance work) before the weights will likely
leave you a bit too tapped to enjoy a productive and safe session with the iron.

Ratamess, Nicholas A. et al. (October 2016). Acute Resistance Exercise Performance Is Negatively Impacted by Prior Aerobic Endurance Exercise. Journal of Strength and Conditioning Research, Vol. 30 (10)