19/07/2026
Just because a weight feels heavy doesn’t mean it will make you strong. 💪🏻
I’ve coached enough hours in my lifetime to know when the weight being lifted is appropriate for the reps being programmed.
When we lift weights, our goal is to be challenged, to give our muscles, nervous system, and mindset a reason to come back stronger than they are today.
When you lift weights that feel heavy, but still leave you with lots of reps in the tank, you’re mostly burning calories, getting your heart pumping, and enjoying a little dopamine hit.
When you lift weights that are genuinely challenging, though, we learn to recruit more muscle, become stronger, and build muscle that can handle greater demands. Our muscles become stronger, bigger, and better equipped to produce force.
We also build better control and skill under load.
At On Form, we use Reps in Reserve (RIR) a lot of the time. It’s a simple and much more precise way of judging effort than just saying, “That felt heavy.”
As a general guide:
• Normal training: 3 reps in reserve
• Muscle growth: 2 reps in reserve
• Max strength or peaking: 1–2 reps in reserve
Start paying attention to this and see how it transforms your workouts and your results.
Simplicity gets results, and it doesn’t get much simpler than this.