How to Lose Weight without Dieting? Watching what you eat can take the fun out of getting a hot summer bod, take these steps to find out how to get toned and fit without having to diet. While dieting does provide quick results, they’re often short-lived and at times, detrimental to your health. It’s not a sustainable approach to losing weight, as it demands energy, time and restrictive behaviours. Actively integrating healthy living alternatives into your lifestyle gives you a better chance of losing weight in the long run.