Could four one-minute bursts of exercise really improve blood sugar? We try “exercise snacks” ourselves before taking a close look at the clinical trial that inspired headlines. We explain why the study’s main result wasn’t statistically significant, how 34 secondary outcomes complicated the story, and what pre-registration can reveal about a study after it’s published. Along the way, we compare notes on our own exercise-snacking adventures, debate continuous glucose monitors, and ask how much evidence a single study should generate before it becomes health news.


Statistical topics

  • Crossover design
  • Multiple testing
  • Pre-registration
  • Primary vs secondary outcomes
  • Randomized controlled trial
  • Research transparency

Methodologic Morals

  • “It's good relationship advice to be transparent. It's also good research advice.”
  • “If the primary outcome is not significant, say it up top.”

References


Kristin and Regina’s online courses: 

Demystifying Data: A Modern Approach to Statistical Understanding  

Clinical Trials: Design, Strategy, and Analysis 

Medical Statistics Certificate Program  

Writing in the Sciences 

Epidemiology and Clinical Research Graduate Certificate Program 

Programs that we teach in:

Epidemiology and Clinical Research Graduate Certificate Program 


Find us on:

Kristin -  LinkedIn & Twitter/X

Regina - LinkedIn &ReginaNuzzo.com


  • (00:00) - Intro
  • (04:06) - The claim: four minutes a day
  • (07:05) - Our own N of 1 experiments
  • (13:24) - The study
  • (21:54) - Primary outcome: complete miss
  • (25:16) - Secondary outcomes to the rescue?
  • (35:02) - Statistical sleuthing and transparency
  • (44:23) - Rating the claim

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