I like to run before a workout because I use this as my "warm-up". I usually run between 6-9 miles before lifting weights. However, I am an ultra runner so this mileage is "easy" for me. Bottom line is that you should not stretch or stress muscles that are not warmed up and loosened.
Irun100s (Certified Fitness Trainer)
Irun100s (Certified Fitness Trainer)