Mixed

Performing endurance training before strength training within the same session yields significantly greater improvements in aerobic capacity and endurance performance than performing strength training before endurance training or performing them separately.

If you combine running and weightlifting in one session, do the running first. This study shows that doing endurance training before strength training leads to significantly better improvements in your 4km run time and aerobic capacity (VO2max) compared to doing weights first. Fatigue from strength training likely compromises the quality of your subsequent endurance work, reducing aerobic adaptations.