Posted: 23/02/2015 at 22:37
Swimming is useless for weight loss. It'll keep you supple but that's about it.
80% of it is nutrition, get that right and you'll be fine. You can train all you like but get it wrong and you just won't see the real gains.
The real problem is, that's not what people want to hear. I'd tell her to join a beginners group if there's one local. It's not all about weight loss, getting fitter and running marathons. There's the social side of it, the parkruns with friends, the feeling you get from having physical exercise.
Despite the aching limbs, the occasional injuries and everything else it really is worth the hassle.