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Stuart Phillips

Muscle physiologist, McMaster University
ScienceWorld
Longevity
Last updated: 7 October 2026

At a glance

  • Muscle physiologist and professor of kinesiology at McMaster University (Canada), one of the most cited researchers on protein, resistance training and muscle mass.
  • Studies how diet and training drive muscle protein synthesis, in young athletes and especially in older adults.
  • Co-authored a large meta-analysis (British Journal of Sports Medicine, 2018) in which extra protein supported muscle gains from resistance training, with little added effect above roughly 1.6 g per kilo of body weight per day.
  • Showed in older adults that just two weeks of taking far fewer steps already leads to muscle loss and poorer blood sugar control.
  • An active, level-headed voice on social media and in expert debates on protein needs, plant versus animal protein and supplements.
  • A recurring theme in his work is ‘anabolic resistance’: older muscle responds less to protein and training, so it needs a stronger stimulus to be maintained.
  • Takeaway: combine resistance training with enough protein spread across meals, and avoid long stretches of inactivity — especially after sixty.

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