Training for Size, Training for Mass

Tom MacCormick

Strength and Conditioning, Personal Training, Sports Science



Bryan Haycock is the creator of hypertrophy specific training or HST for short. In this episode, we take a deep dive into:



  • Exactly what goes into HST, including what actually causes muscles to grow
  • The principles of program design for hypertrophy
  • The mistakes most gym goers are making when it comes to training for size
  • The misunderstood concept of strategic deconditioning and having science prove him right 20 years after he developed the concepts behind HST


If you enjoyed this podcast and took value from it, please rate and review to help us spread the word to motivate and inspire others to take their performance to the next level. For more podcasts like this, visit the Six Pack of Knowledge page.


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Your host Tom MacCormick is a personal trainer and online coach whose goal is to be the curator of the greatest hypertrophy experts on the planet. If you are interested in working with Tom or finding out more about him then follow him on Instagram @tommaccormick or visit his website

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