Should you take whey protein before running and after running?

Never take it before running cause the lactose (whey) in protein is bad for your knees and can ruin your knees if you run with it in your system, plus a heavy substance in your system when running will make you feel sick. Take it afterwards when your body is looking for protein to rebuild the muscles and since usually people dont feel like eating right after cardio workout, protein with water or shake will be easier on your stomach.

IMPROVED ANSWER:

What?

Rest assured, taking whey protein will in no way ever "ruin your knees." Furthermore, there is very little lactose in most whey mixtures, and none at all in a whey isolate mixture.

Additionally, whey is not a "heavy substance" that will make you feel sick if you ingest it before running. However, it is true that whey is best eaten after a hard workout to help re-fuel your muscles. Even so, if you want to drink a whey shake before a run, help yourself. Your body will use the portein either way.