Can You Build Muscle In a Calorie Deficit: Lose Fat In a Surplus (Science Explained)

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

Introduction

In this article, we explore the possibility of building muscle while in a caloric deficit and losing body fat in a caloric surplus. We’ll discuss how this can be possible and under which circumstances.

Can You Build Muscle in a Caloric Deficit?

  • It is possible to build muscle in a caloric deficit if certain factors are met, such as having less training experience, a higher starting body fat percentage, a smaller deficit, and a higher protein intake.
  • Body recomposition (building muscle while losing fat) is possible due to the differences in energy density between fat and muscle tissue and the fact that they are separate systems.
  • Research has shown that subjects can lose fat mass while gaining lean mass when in a caloric deficit, as long as they are on a progressive resistance training program and eating a high protein diet.

Can You Lose Body Fat in a Caloric Surplus?

  • It is possible to lose body fat while in a caloric surplus if you build a lot of muscle quickly because of the differences in energy densities between fat and muscle.
  • However, this is not practical in the long run, and it is recommended to focus on discrete cutting and bulking cycles after the first couple years of training.

Conclusion

In summary, it is possible to build muscle while in a caloric deficit and lose body fat in a caloric surplus under certain circumstances. This process, known as body recomposition, is achievable when the right factors are considered, such as training experience, body fat percentage, caloric deficit size, and protein intake. However, for more advanced trainees, it is recommended to focus on discrete cutting and bulking cycles to optimize results.

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