Workout for Beginners
June 11, 2026
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Four-week transformation programmes and very low calorie diets are everywhere. Before you try one, here is what they actually do to your body — and why a different approach will serve you far better.
You will see them everywhere at this time of year. Promises of four-week transformations and 28-day body overhauls, marketed with before-and-after photos. The truth behind these programmes is something every person who has ever started one deserves to understand.
Many of these before-and-after photos are edited, photographed with deliberate lighting changes, and taken with timelines that have nothing to do with the four weeks they claim. But the bigger problem is what these programmes actually do to your body.
When you dramatically reduce calories, your body adapts by becoming more efficient — meaning it burns fewer calories to carry out the same functions. This is your body protecting itself from what it perceives as famine. The result is that you need to eat even less just to maintain the weight loss, which is unsustainable.
A significant calorie deficit — especially without adequate protein and resistance training — causes your body to break down muscle tissue for fuel alongside fat. Muscle is metabolically active tissue: the less of it you have, the harder it becomes to lose fat and keep it off. This is one of the key reasons people who crash diet often end up in a worse position than when they started.
Very low calorie diets trigger hormonal responses that dramatically increase appetite. Ghrelin — the hunger hormone — rises. Leptin — the satiety hormone — falls. You are not lacking willpower when you give in to cravings on a crash diet. You are fighting biology, and biology usually wins.
Most studies on very low calorie diets show that the majority of weight lost is regained within one to five years, often with additional weight on top due to the metabolic changes described above. The cycle of crash dieting and regaining is not only physically damaging — it takes a significant psychological toll too.
A sustainable calorie deficit of 300–500 calories per day, paired with resistance training and adequate protein, is what actually works long term.
Save your money and protect your metabolism. A modest, sustainable deficit — paired with training that builds and preserves muscle — is less dramatic than a 28-day programme but produces results that actually last. Speak to the Hello Fit team if you would like guidance on where to start.
The Hello Fit team are passionate about helping members of all abilities achieve their goals through training and good nutrition habits.