the water offers you support, has mimimal risk of injury. It's also good for firming up post-baby boobs. Take care to keep your head down if you're doing breaststroke, though - holding it up can put a strain on your neck and lower back. Exercise classes: These vary in their intensity, so stick to one specifically designed for postnatal women, such as Pushy Mothers . (Find out more about what's in your area by checking out your local boards, or visiting the website of The Guild of Pregnancy and Postnatal Exercise Instructors .  At the very least make sure you go for one that's 'low-impact' - that means anything where you've always got one foot on the floor. If in doubt, ask the instructor first, and make sure they know you're a new mum - often, there'll be lower-impact alternatives to some of the moves that are more suitable for you. Finally, before you work out, don't forget: To wear a decent pair of trainers (don't forget that your feet can increase in size during pregnancy, so go to a reputable sports shop and get yourself measured and buy a new pair if necessary.) To wear a well-fitting sports bra, or two if you need more support. (If you're breastfeeding, feed your baby beforehand to avoid leakage, and pop in a couple of breastpads, just in case.) To keep yourself well hydrated during and afterwards. Don't be tempted to avoid fluids if you've got leaky bladder issues: keep drinking (but