At the start of 2017, I was the heaviest I'd ever been in my life. The lengthy journey taught me some important lessons that have influenced how I think and approach my health. They say fitness isn't a sprint; it's a marathon, but the marathon has no finish line. If you have a poor body image, no amount of exercise or weight reduction will make you love your body. Your real beauty is linked to who you are, not how you look, says fitness blogger Jodie O'Neill.