Fat loss after 40 follows the same basic energy-balance principles as at any other age, but preserving muscle and training performance should become a higher priority.
Use a moderate calorie deficit
Extremely aggressive diets can make it harder to train well and maintain lean mass. A moderate deficit is usually easier to sustain and gives you more room for adequate protein and carbohydrate intake.
Keep resistance training
Strength training tells the body that muscle is useful tissue worth retaining. During a diet, maintaining training quality is usually more important than adding large amounts of extra exercise.
Keep protein high
Protein supports satiety and muscle retention. Spread high-quality protein across the day and make it a consistent part of each main meal.
Use cardio strategically
Cardio can increase energy expenditure and improve health, but more is not always better. Walking is especially useful because it adds activity with relatively low recovery cost.
Watch performance and recovery
If strength is dropping rapidly, sleep is deteriorating and fatigue is climbing, the deficit may be too aggressive. Progress should be assessed over weeks, not day to day.
Measure more than body weight
Use waist measurements, photos, gym performance and body-composition trends alongside scale weight. Daily weight naturally fluctuates with hydration, food intake and glycogen.
PRIME 40 includes detailed nutrition, training, cardio and body-composition guidance designed specifically for adults over 40.