Agree; but note the study of the Swiss swimming team Limmat Sharks on fat reduction and cardio:
"The results suggest that in terms of beneficial effects on body composition, there is no difference between aerobic exercise on land and in water as long as intensity, duration and frequency of workouts are comparable. [..] However, swimming as the exclusive sport could be problematic, because the small load on the skeleton is not favourable to prevent osteoporosis"
"The results suggest that in terms of beneficial effects on body composition, there is no difference between aerobic exercise on land and in water as long as intensity, duration and frequency of workouts are comparable. [..] However, swimming as the exclusive sport could be problematic, because the small load on the skeleton is not favourable to prevent osteoporosis"
http://limmatsharks.com/Swimming%2BFatReduction/index.html http://www.limmatsharks.com/Fatburner/
Generally, the articles of Limmat Sharks are great reads on swimming. I can't recommend them enough.