返回所有工具

增肌速率计算器

基于科学发现您每周和每月的真实增肌潜力。

How the Lyle McDonald Muscle Gain Model Works

The Lyle McDonald model is one of the most widely cited frameworks for predicting natural muscle gain potential. It categorises lifters by training experience and assigns expected yearly gains. In the first year of proper training, a male lifter can expect roughly 9 to 11 kilograms of muscle gain. The second year drops to approximately 4.5 to 5.5 kilograms, the third year to about 2.3 to 2.7 kilograms, and after four or more years of training, gains slow to 0.9 to 1.4 kilograms per year. Female lifters can expect roughly half these values due to lower testosterone levels. This calculator uses these benchmarks along with your age, training history, and body composition to project personalised estimates. The model assumes consistent training with progressive overload, adequate protein intake, and sufficient recovery. Genetics play a role as well, so the calculator provides a range rather than a single number.

Factors That Influence Your Rate of Muscle Growth

Training age is the most important predictor, but several other factors significantly impact your muscle gain rate. Age matters because testosterone and growth hormone decline after thirty, making muscle gain progressively slower. Nutritional compliance is critical because you cannot build tissue without adequate calories and protein. Sleep quality directly affects growth hormone release and recovery capacity. Training programming plays a role because poorly designed routines with insufficient volume or no progressive overload will yield subpar results regardless of your genetic potential. Stress and cortisol levels can impair recovery and shift your body away from an anabolic state. Finally, genetic factors like muscle fibre type distribution, limb length, and hormonal profile create natural variation between individuals. The Lyle McDonald model accounts for the average, but some people will be genetic outliers in either direction. Track your own progress monthly and compare against the predictions to calibrate your expectations.

常见问题

How much muscle can a beginner gain in the first year?▼
According to the Lyle McDonald model, a male beginner following a proper training programme can gain approximately 9 to 11 kilograms of muscle in their first year. Female beginners can expect roughly half that amount, around 4.5 to 5.5 kilograms. These figures assume consistent training with progressive overload, adequate nutrition with sufficient protein, and proper recovery including seven to nine hours of sleep per night.
Why does muscle growth slow down over time?▼
Your body has a finite capacity for muscle tissue, and the closer you get to your genetic ceiling, the slower gains become. In the first year, your muscles are highly sensitive to the training stimulus and respond rapidly. As you become more trained, your body adapts and requires a stronger stimulus for a smaller response. This is a natural biological process, not a sign of poor training. The diminishing returns follow a logarithmic curve that is well documented across research.
Is the Lyle McDonald model accurate for everyone?▼
The model provides reliable averages for natural lifters, but individual results vary based on genetics, age, and lifestyle factors. Some people will exceed these predictions due to favourable genetics or an exceptional training environment, while others may fall slightly below. The model is most useful as a reality check to set expectations and identify whether your current approach is producing results within the expected range.
精益增肌计算器蛋白质摄入计算器力量水平计算器

探索我们其他免费的健身计算器： 查看所有工具