Iron Culture presented by MASS Ep 341 - Unpacking Individual Responses to Training Volume
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Aug 20, 2025 
Dr. Zac Robinson, a PhD graduate and researcher specializing in resistance training volume, joins the discussion to uncover how individuals uniquely respond to varying training intensities. He dives into his dissertation findings, emphasizing that not everyone benefits from high-volume workouts. The conversation highlights the importance of personalized training regimens and the need for adaptive strategies in coaching. They also tackle the complexities of individual variability and the exciting shifts in resistance training research, suggesting future directions for optimizing training practices.
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Team Effort Behind The Dissertation
- Zach credited his lab team and committee for making the dissertation possible.
- He emphasized the project was a team effort, not a solo achievement.
Variation Is A Multi-Ingredient Problem
- Observed individual variation is a mix of true differences, measurement error, biological variability, and sampling variance.
- Without isolating these ingredients, we only taste the final product and misattribute causes.
Replicate To Reveal True Individual Responses
- Replicate within-participant interventions to separate true individual differences from random fluctuations.
- Run multiple observations per person rather than a single crossover to estimate each individual's true response.