@experiencebasedtraining 90-Day Challenge
Sam Pitcairn mid-rep on a dumbbell preacher curl
Day 1 13.5" → Day 50 15.0"

The 90-Day Arm Challenge

Exactly how I structure 90 curls a day.

90 curls a day for 90 days, never repeating an exercise. Get the rep schemes I rotate, how I pick a weight I can hold for all 90, and the rules that keep my elbows healthy.

90days straight
8,100total curls
0repeated exercises
+1.5"by Day 50 (tape)

What's inside

The whole system on one page

  • The 3 rep schemes I rotate. Heavy, standard and pump days, and why I don't do the same one twice in a row.
  • How to pick the weight. The one rule for choosing a load you can hold for all 90 reps.
  • How hard to push. Where I stop each set, and why going to failure doesn't work when you're back tomorrow.
  • The variation menu. The curl variations from the challenge, grouped so you can rotate grip and angle and protect your elbows.
  • How it fits with the rest of your training. What I do for everything else while my arms train daily.

Why trust this

A sports scientist running the experiment on himself

  • M.S. Sports Science, University of Pittsburgh
  • Sports scientist for Pitt men's and women's basketball
  • Co-author of 10+ peer-reviewed papers
  • Owner of three Pittsburgh gyms; 10+ years coaching

I'm not selling a miracle. A tape measure picks up the pump, water and fat along with muscle, so I'm calling my numbers a rough guide. On Day 90 I measure cold, the same way I did on Day 1, on camera. Sign up and you'll get that result too.

Train arms every day without wrecking your elbows.