Weights vs. Cardio: Keep Them Separate or Combine?

A while back, I received a message on Facebook from listener Lindsey. She said:“In another episode you talked about how aerobic exercise and weight lifting affect each other, but I'm not sure I understood. As a runner, can I run to the gym to lift weights and run home again or should I keep the cardio and weights on separate days? Thanks for your help!”After thanking Lindsey for her great question, I promised that I would do a deeper dive in the near future. I also told her that, in a nutshell