How to Build Muscle and Lose Fat at the Same Time (Body Recomposition Science Explained)

This entry is part [part not set] of 48 in the series Science Explained Series by Jeff Nippard

Introduction: The Possibility of Body Recomposition

Many people believe that losing fat and building muscle simultaneously is impossible. However, scientific studies have shown that body recomposition is not only achievable but also quite common. In this article, we will discuss the key factors and strategies that can lead to successful body recomposition, even for more experienced trainees.

Factors That Influence Body Recomposition

Meaningful body recomposition primarily occurs under four circumstances:

  • Beginners
  • Detrained lifters
  • Overweight or obese individuals
  • Users of anabolic steroids

Beginners

Beginners wanting to build muscle and lose fat concurrently should:

  1. Maintain a moderate caloric deficit
  2. Eat a high-protein diet
  3. Gradually increase strength in the gym

Detrained Lifters

Detrained lifters can benefit from muscle memory. When training stops, muscle control centers called myonuclei stick around, allowing for faster muscle protein synthesis once training resumes.

Overweight or Obese Individuals

There is enough body fat in overweight or obese individuals to fuel the muscle-building process. Fat burning can support muscle growth even while eating in a caloric deficit.

Anabolic Steroids

Anabolic steroids enhance muscle fiber growth through faster nuclei gain, similar to the effects of muscle memory.

Body Recomposition Strategies for Advanced Trainees

For advanced trainees who don’t fall into the four categories above, body recomposition is still possible with the right approach:

  1. Cut first: Begin with a lower body fat percentage to achieve a more substantial difference in appearance.
  2. Avoid extreme leanness: Post-contest prep is not ideal for recomposition, as the body needs more fat gain for proper recovery.
  3. Utilize muscle memory: Increase training volume and intensity after a period of reduced training to stimulate new growth and recomposition.
  4. Optimize anabolic hormone levels: Aim for moderate weight gain while regularly assessing visual progress. New relationships can also boost testosterone levels, aiding in recomposition efforts.
  5. Ride the train as long as possible: Continue until fat gains exceed muscle gains, then switch to a maintenance or bulking phase.

Periodic Cuts and Bulks for Intermediate to Advanced Trainees

Outside of temporary recomposition, intermediate to advanced trainees should organize their programs into distinct cutting and bulking cycles. Two suggested approaches are:

  1. Longer bulking cycles of six or more months, followed by longer cutting cycles
  2. Shorter bulking cycles of two to four months, interspersed with two to four-week mini cuts for those who prefer to stay leaner year-round

Conclusion: Key Takeaways for Body Recomposition

Body recomposition is possible for individuals in various stages of their fitness journey. Beginners, detrained lifters, overweight or obese individuals, and anabolic steroid users can all achieve simultaneous fat loss and muscle gain. Advanced trainees can also attain body recomposition through strategic cutting and bulking cycles. Understanding these factors and implementing the appropriate strategies can lead to successful body recomposition, regardless of experience level.

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