Una told a Women's Fitness magazine: ‘my abs were the hardest part to tone after pregnancy.
My tummy felt like jelly for a while and it’s much more difficult to tone than it used to be.
The singer revealed how getting back in shape was far from her main priorities after giving birth to daughter Aoife Belle, now 2.
She said: ‘how you look is the last thing on your mind when you have a baby.’
Una revealed that she finds exercise DVDs are the perfect way to fit exercise into her busy schedule.
She said: ‘at the moment I love Jillian Michaels’ 30 Day Shred as it’s really intense. It’s perfect for me because, as a mum, it’s difficult for me to get to the gym all the time.’
Una admitted that going back to work with girl band The Saturdays helped her snap back into shape.
'Dancing and performing keeps me fit. I don’t have a personal trainer at the moment, but if I was working towards a goal then I’d get one – not just to help me get fit, but to stop me running out of breath when I’m on stage!’
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Bandmate Frankie Sandford has reportedly tried a juicing diet in order to shed the pounds following the birth of her son Parker last year.
Kim Kardashian has admitted that she felt the pressure to get her post baby shape back quickly after giving birth.
Drew Barrymore recently spoke out about her healthy and relaxed attitude to gaining weight, saying that she is choosing to enjoy pregnancy.