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263. How to Execute a Lean Build + Train for Muscle Growth

Oct 13, 2026
How to Execute a Lean Build + Train for Muscle Growth
 

We're officially diving deeper into lean build season, because eating more food alone isn't going to build the body you want!

If you're increasing your calories, but your training isn't giving your body a reason to change, you're not actually setting yourself up to build muscle. 

In today’s episode, I'm talking about how to execute a lean build AND how your training needs to support it. You need a few things in place to do this well: consistent resistance training, progressive overload, adequate protein, an understanding of your maintenance calories, and a willingness to actually commit to this. 

If your goal is to build your glutes, shape your shoulders, add muscle to your legs, and ultimately “look” like you lift, we're training for muscle growth. Getting stronger is part of that process, but it isn't the entire goal. 

A build isn't just eating more. It's giving your body the resources + the training stimulus it needs to freaking BUILD!

Episode Recap:

  • What a lean build actually is + how to execute one intentionally
  • Why increasing calories alone isn't enough to build muscle
  • What should be in place BEFORE adding calories for a lean build
  • What to track during a build beyond just changes on the scale
  • The difference between training for strength vs. hypertrophy
  • How rep ranges, progressive overload, and training close to failure support muscle growth
  • Why there's no magical rep range for building, strengthening, or “toning” muscle
  • How to train for hypertrophy without access to super-heavy weights
  • How your training priorities shift during a build, maintenance & deficit
  • Why getting stronger is part of building muscle (but isn't the same as strength training)
  • Aligning your nutrition & training so you're giving your body both the resources + stimulus to grow

Links/Resources mentioned:

More about the Unf*ck Your Fitness Podcast:

If you've tried all the fad diets and are sick and tired of not achieving your health and fitness goals long-term, you've come to the right place! Welcome to the Unf*ck Your Fitness Podcast with me, Kristy Castillo. I'm here to help you break the annoying diet cycle, gain confidence, and reach your health and fitness goals. 

This podcast will show you how to be proud of the body you have, build the body you want, and enjoy the process along the way. I'll cover topics like how to get the most from your workouts, the importance of feeding your body what it needs, and key mindset shifts that will empower you. I've broken through the BS surrounding diet culture and built my dream body, all while being a busy wife, Mom and business owner, and I know you can too!

Connect with me on Instagram at @kristycastillofit

Learn more about working together by visiting my website: https://www.kristycastillo.com/

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