When Kev De-Lara had a shock visit with the GP about his weight, he knew it was time to make a change. Since then, Kev, who previously weighed 20 stone (127kg), has lost an incredible seven stone (44kg).But how did he do it?After realising he had to lose some weight for the sake of his health, he decided to sign up for MyFitnessPal.The app calculates the number of calories users have consumed from food and burned from exercise.It lets them know how many calories they have left to eat for the day and if they stick within their calorie limits, they should achieve the weight loss (or gain) they’re looking for.READ MORE: Diet: Expert warns against common mistake Man loses seven stone while still eating sweet treats – ‘I still lose weight!’ (Image: Kev De-Lara)And despite his huge weight loss success, he still uses it to track his food intake.Counting calories can help people lose weight by bringing awareness to what they eat each day.This can help them identify eating patterns that they may need to modify in order to see results, keeping them on track to reach their goals.DON’T MISSDiet: 5 myths of Military Diet that could have adverse effects [LATEST]Dr Michael Mosley shares 3 alternatives to help cut down on carbs [ADVICE]Fitness: Best way to warm-up for strength training [HEALTH NEWS] Kev is successfully managing to maintain a ‘healthy weight’ (Image: Kev De-Lara)He also focuses on looking after his mental health in various ways, revealing: “This is important, as when my mind is in a good place, then so is my healthy eating adherence.”Now a multi-site gym manager and personal trainer weighing 13 stone, Kev explained his weight loss has dramatically changed his life for the better.He said: “I’m happier, more confident, have more energy and love myself now.”Being a gym manager is also something that I never thought would be possible!”