Back 40 Fitness

The Science of Rest Periods: Why Patience Between Sets Leads to Bigger Strength Gains

We've noticed many dedicated lifters making the same mistake: rushing their rest periods in the belief that more work means better results. Today, we're breaking down why strategic rest between sets is crucial for your strength gains, backed by science and practical application. The Energy Systems Behind Your Lifts To understand rest periods, you first need to understand how your body powers those heavy lifts: ATP-PC System (Phosphagen) This is your body's immediate energy source—the one that powers explosive movements like a heavy squat or deadlift. It provides maximum power but depletes within 10-15 seconds of intense effort. Here's the...

Read more


The Power of 2.5lb Plates: Your Secret Weapon for Sustainable Strength

Whether you're an outdoor enthusiast or simply want to keep up with daily activities with ease, building strength gradually and intelligently is key. Today, we're focusing on what might be the most underrated piece of equipment in strength training: the humble 2.5 pound plate. The Science of Progressive Overload Progressive overload is the foundational principle behind effective strength development. Research consistently shows that to continue building strength, you must gradually increase the demands placed on your muscles and nervous system over time. While there are multiple ways to achieve progressive overload (increasing reps, sets, or decreasing rest periods), adding weight...

Read more