There is plenty of evidence that running is good for your knees as long as you aren't making an injury worse. Also the only way to have a six pack is have low

There is plenty of evidence that running is good for your knees as long as you aren't making an injury worse. Also the only way to have a six pack is have low body fat, one of the many ways to achieve that is through running. I don't think one should assume exercise means running but your points against running are wrong as well.