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[@RenaissancePeriodization] These Undertrained Muscles Are Ruining Your Physique

· 3 min read

@RenaissancePeriodization - "These Undertrained Muscles Are Ruining Your Physique"

Link: https://youtu.be/IMNjp8nXAAU

Duration: 15 min

Transcript: Download plain text

Short Summary​

RP, the expert behind the RP Hypertrophy app, argues that side delts should be trained first in the session with 3-6 sets across two different exercises and hit 2-4 times per week rather than the typical 1-2 times per week. He also claims that bigger side delts visually shrink the waist because the eye judges waist width relative to shoulder width rather than in isolation.

Key Quotes​

  1. "The triceps are like 2/3 of the arm size you can potentially get." (00:10:56)
  2. "to the human eye, and especially the female human eye, the calculations on waist width [music] are made in reference to shoulder width, not by itself." (00:06:24)
  3. "Do you guys remember the cartoon character Johnny Bravo? He was jacked, but women despised him. Was it because of his curt and self-infatuated demeanor? God, no. It's because his biceps were too big for his triceps." (00:10:44)
  4. "Shit, three sets of side delts let you heal like a few hours later or something. Training delts once or twice a week won't cut it." (00:04:04)
  5. "Your delts can recover super fast and love volume like Jared Feather, IFBB pro, likes toxic big booty latinas. A lot is what I'm trying to say." (00:05:35)

Detailed Summary​

Episode Summary: RP on Side Delt Growth

Background​

  • RP, the figure behind the RP Hypertrophy app (Renaissance Periodization line of content), delivers hypertrophy advice targeted at physique-focused lifters.

Core Recommendation: How to Grow Side Delts​

  • Train side delts first in the workout. RP recommends prioritizing them at the start of the session so they receive the highest performance and focus.
  • Volume: 3-6 sets total spread across two different side delt exercises within the session.
  • Frequency: hit side delts 2-4 times per week, explicitly going against the common 1-2 times per week approach that most lifters default to.
  • The combined prescription (first-in-session placement + higher weekly frequency) is positioned as the protocol that actually drives measurable side delt hypertrophy.

The "Why It Matters" Claim​

  • Bigger side delts make the waist appear smaller.
  • The mechanism is perceptual: the human eye calculates waist width in reference to shoulder width, not on the waist's own absolute size.
  • Practical implication: building side delts can exaggerate the V-taper aesthetic without any actual change to waist circumference.

Key Numbers at a Glance​

  • 3-6 sets per session
  • 2 different side delt exercises
  • 2-4x/week training frequency (vs. the typical 1-2x/week)