Fitness coach Jeff Cavaliere is taking the guesswork out of training. In a recent YouTube video shared on June 2, 2025, he explained how building size and strength differ from each other.

Boasting over 14 million YouTube subscribers, Cavaliere’s ATHLEAN-X channel is one of the most popular in the fitness sector. He curates scientific research and incorporates it into his demonstrations , helping lifters and gym enthusiasts reach their goals , which are often different.

Jeff Cavaliere Details How to Train for Hypertrophy or Strength

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A post shared by ATHLEAN-X™ | Jeff Cavaliere MSPT, CSCS (@athleanx)

Below, you can find a quick overview of the principles he discussed in his recent YouTube video:

Technique Focus

Rep Ranges

Volume

Fatigue Tolerance

Re

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