swimming is BETTER than running, not only are you working out your whole body BUT youre also saving your knees.. running too much same with biking.. is bad for your knees. So i most definitely recommend swimming.
yeah, i always wonder why people run on sidewalks/roads, especially around nice parks with a dirt trail or grass.
The problem with swimming is that unless you are good enough at it to do it efficiently then its not going to be good for your cardio. I have friends that can run miles but they can hardly swim a few laps and its not because they dont have good cardio its because they are not good swimmers. Its all relative.
i have a similar question about swimming. Does stroke matter? like say you are training MMA, which stroke would best benefit you? or are they all relativey same be it breast stroke, freestyle or back stroke?
The truth.
I can run for miles and miles without problems, but get me to do a couple of laps of the pool and I'm a gasping wreck clutching at the edge of the pool afterwards. I'm just so technically inefficient that I'd wager I use as much energy in 2 laps, as someone with good technique would expend in 10 laps.