More often than not, the way we talk to ourselves really holds us back. How many times have you said to yourself, 'I wish I could do that', then without even trying, you write off that very thing as an impossible dream?

It's true that we Brits are very good at moaning. We complain about the weather, the traffic, feeling fat, food and the lack of it. But this conscious stream of negative thinking damages us in more ways than we realise. Pretty quickly, those uninspiring thoughts start to reflect on all parts of our lives. We always expect the worst.

Instead of reminding ourselves how brilliant, vibrant and talented we are, we're more likely to tell ourselves that we're useless, unattractive and undeserving. This is not good news for your self-confidence.

Thankfully, in the same way you taught yourself to be your worst critic, you can just as easily teach yourself to feel more positive again. Start by listening to the way you talk to yourself and make an effort to correct the language you're using. For example, instead of saying 'I hate the way I look, I wish I could lose weight', say 'I can't wait to be fitter and in better shape'. By putting a positive spin on your thoughts you'll start to feel happier, more confident, and you'll see results.

When you look in the mirror, find things you like about yourself, instead of staring hatefully at your saggy tummy or cellulite-ridden thighs. Or congratulate yourself for eating healthily today.

Make an effort to smile more. Smile at other people and, when you catch your own reflection, smile at that too. It feels weird at first, but it really will make you feel happier.

There's no point 'hoping' you can change your body - you have to be positive that you will. None of our nation's top athletes or footballers begin each race or match simply 'hoping' to win. They win by being 100 per cent focused on their goals. If you want to change the way you look and feel about yourself you need to start thinking like a winner too.

Read our affirmations on the next page.

Now repeat after me...

1. I know Rome wasn't built in a day and a healthy body is going to take time as well. From now on, every 'brick' that I place in terms of correct nutrition and exercise will help lay the strong foundations for a better life.

2. I am going to get into shape and eat more healthy foods because I want to, not because anyone else thinks I should.

3. By looking after my body through sensible exercise and eating, I'm showing that I love and respect myself. This will make every part of my life better.

4. I will start to think positively because, without sound emotional fitness, I can never be truly fit. Firm your mind, and your legs, bum and tum will follow!

5. Being fit and healthy will reduce my risk of illness and increase my energy levels. If I do this, I will look and feel better than ever.