If 5 to 30 reps can all build muscle, why do some rep ranges clearly work better than others?
After 40, could the “science-based” advice you’re following be the exact reason your progress has stalled?
I brought strength coach Andy Baker back to challenge one of the most oversimplified ideas in evidence-based fitness: that rep ranges are basically interchangeable.
We break down the five rep ranges you need to understand, from heavy 1 to 4 rep strength work through 20 to 30 rep sets, and exactly where each belongs in your training.
You’ll learn why 4 to 8 reps may be the “meat and potatoes” for getting brutally strong and building muscle, when higher reps make more sense for isolation work and cranky joints, and why the effective reps model gets misunderstood.
Plus, Andy shares his simple 80 percent rule for programming your lifting weights after 40.
Grab Andy’s workout programs at andybaker.com/programs
Download MacroFactorto track your nutrition while getting big and strong on Andy’s programs (use code WITSANDWEIGHTS for a 2-week free trial)
Timestamps:
0:00 - Why rep ranges still matter
5:08 - What hypertrophy research actually proves
9:22 - Effective reps without the internet myths
20:25 - When 1-4 reps work
29:31 - Why 4-8 dominates
37:24 - Best uses for 8-12 reps
43:53 - Higher reps for joints and isolation
57:07 - When 20-30 reps makes sense
1:03:48 - The "80% at 80%" programming rule
Episode resources:
💪 Join Eat More Lift Heavy, the 26-week coached program to build muscle and lose fat after 40
📱 Get Fitness Lab, the AI coaching app for strength training and nutrition over 4
📊 Track your nutrition with MacroFactor and use code WITSANDWEIGHTS for a 2-week free trial
👥 Join the free Facebook community
❓ Ask a question for the show
Educational content only, not medical advice.
