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Kayla Itsines is a leading personal trainer from Adelaide, South Australia. With over 5 million avid social media followers, she has become the global go-to girl for fast workouts, fitness motivation and healthy eating advice — all in the 18 months following the release of her 12-week Bikini Body Training Guide. The social media sensation will be sharing her diet and fitness tips and tricks on a weekly basis.

Alexandra Carlton is a Sydney-based journalist, wife and mum of a nine-year-old boy. Fifteen years of interviewing psychologists, scientists, politicians, taste-makers and other highly-qualified people for print, online media and podcasts means she's very good at stealing their smart thoughts and passing them off as her own in order to amaze and delight at social gatherings. She's obsessed with documentaries, cool sneakers, ranking her favourite American presidents and starting new, very brief, health regimes. Oh, and she loves solving people's problems. Except her own.

Haven't used your gym membership in six months? Can't bear the thought of speaking in front of a crowd? Been behaving badly? Send your burning questions to our expert columnists at lifecoach@ninemsn.com.au (you can remain anonymous).