There are two fundamental motives for attempting to gain weight: to refine physical look or boost athletic performance. For weight increase in the form of muscle mass, a grouping of increased food intake and dynamic resistance training is crucial. Muscle matter is circa 70% water, 22% protein, and 8% fatty acids and glycogen (stored form of carbs). If all the additional calories consumed are utilised for muscle development throughout resistance training, hence around 2500 additional kilocalories are necessary for every 0.45 kg (1 pound) growth in lean tissue. This comprises the energy required for tissue assimilation as well as the energy depleted during resistance training. Consequently, 350 to 700 kcal beyond daily necessities would accommodate the calories needed to provide a 0.45 to 0.9 kg (1 to 2 pound) weekly increase in lean tissue on top of the energy requirements of the resistance training programme. To achieve enlarged caloric intake, it is advised that individuals eat bigger portions of foods at mealtime, eat supplementary total calories at every meal, eat regularly, and select higher-calorie sustenance. To accommodate frequent eating, meal replacement beverages (normally protein shakes) can be extremely useful, particularly when a person is not famished. Building muscle mass evidently necessitates larger increases in protein requirements. Protein needs are projected to be 1.2 to 2.0 g/kg body weight per day and could be greater if one’s chief source of protein is plant-based, as is the case with vegetarians and even more so for vegans. This is due to the fact that plant proteins have an inferior biological value with respect to animal proteins. Therefore, the arrangement of a suitable anabolic
incentive (resistance exercise) and absorption of adequate protein allows for a positive nitrogen equilibrium. Positive nitrogen balance arises when protein production surpasses protein degradation. It is also essential to remember that for protein synthesis to transpire in skeletal muscle, all 20 amino acids, in correct quantities, must be present. Lambert and colleagues (2004) have advised a macronutrient proportion for bodybuilders of 55% to 60% carbs, 25% to 30% protein, and 15% to 20% fats. This advice would permit plentiful protein to boost muscle growth, on top of abundant carbohydrate to allow for ideal energy for high-intensity resistance exercise, and still deliver enough fat to maintain acceptable testosterone levels in the bloodstream.