Or am I better off doing something else? I can only manage half an hour of either each night. I am five stone overweight so finding it hard. I have managed to lose a stone and a half just dieting but none has gone off my waist. I've not exercised in a long time and need some advice Thanks
Any exercise will help and cycling and swimming have the benefit of being fairly low impact. That means there is less chance of injuring yourself. If you're going to swim can I suggest you swim hard to get the most benefit. Ambling up and down the pool without getting out of breath is better than nothing but swimming hard and making yourself work will give the maximum benefit.