'You'll be up and running in no time at all' Grazia

Is there a large arse-shaped dent in your sofa? An eye-wateringly expensive (and rarely used) gym membership burning a hole in your bank account? Does the sight of your wobbly thighs leave you cowering under the duvet? Then it's time you face the truth: the only option is to lace up your trainers and hit the ground running.

Funny and brutally honest, Ruth Field and her straight-talking alter-ego, The Grit Doctor will give you - yes, you - the push you need to start pounding the pavements and shedding pounds in no time.

• Locate your inner grit and long-lost energy with a completely foolproof beginners' programme 
• Enjoy carbs without guilt with The Grit Doctor's tasty and nutritious recipes 
• Now includes marathon training plan to transform you from casual jogger to elite(ish) athlete If you want to lose weight, get fit and become and ass-kicking, gets-things-done superwoman, there's only one thing left to do . . . 

RUN!

'Ruth is an inspiring running buddy' Daily Express