vinylgroover said:Get yourself a real bike and cycle. It's far more interesting than swimming, great cardio and will increase your leg muscularity considerably.
Cycling CAN be good cardio as long as you don't let yourself cheat by coasting. I think cycling is good to add to the mix if you have the means, but for an entire body toning cardio workout with minimal impact on your joints and spine, you can't beat swimming. Sure, if you are lean you'll bust your ass just trying to stay above the surface, but as your technique improves, you'll become more efficient and find it much easier to put in 30-45min. And it doesn't always have to be freestyle...change it up with a couple laps of breast stroke to let your HR come down if you feel you're working too hard...it's a great interval type workout.
A 155lb person will burn about the following in an hour:
Bicycling, 10-11.9mph, light effort - 422 cal
Bicycling, 14-15.9mph, vigorous effort - 704
Bicycling, >20mph, racing - 1126 cal
Running, 10 mph (6 min mile) - 1126 cal
Running, 6.7 mph (9 min mile) - 774 cal
Swimming laps, freestyle, light/moderate effort - 563cal
Swimming laps, freestyle, fast, vigorous effort - 704 cal
Walking, 4.0 mph, very brisk pace - 281 cal
Rope jumping, moderate, general - 704 cal
Aerobics, high impact - 493 cal
Jobu