Our expert says:
It's not bad. The problem is that because the water reduces your effective weight, you aren't doing quite the same level of work as you would on land. The energy use is thus lower and you don't see quite the same benefit. It's really good for starting out, for people who are injured and need lower impact, and for some variety, because it is quite demanding, but I'd suggest that it become part of, rather than the focus of, a training programme for weight loss.
It's definitely mostly cardio, but with a strength component, because you work against water. Given the choice between water aerobics and nothing, then it's a no-brainer, and if you enjoy it, then it's brilliant. But if you have access to other kinds of training, then use water aerobics some of the time for variety and you'll see results for sure!
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