swimming as my cardio. Can't use running.

[Ghost Man]

Lately my knee has been killing me and I stop running as my cardio. I use to do 30min of cardio 3 days a week. I hate bike riding because I use to moving the entire body. So....would swimming be a good choice of cardio? Or is swimming better then running?

[Lady C]

Swimming is good cardio. The major drawback is that you can't tell how hard you are pushing because you can't feel yourself sweat. I would recommend wearing a heart rate monitor to make sure you are working at the right intensity. You can do running in the pool as well. No impact but lots of resistance.