Before you begin
How to Fit Training Into Your Busy Life
1. Work shorter, harder, smarter
2. Follow these three secrets
3. Maximize your strength
4. Workout on the go
Plus: Know your numbers<...
HOW HARD SHOULD YOU GO?
PERCEIVED EXERTION (PE): 1 2 3 4 5 6 7 8 9 10
1: not remotely challenging;
5: breathing deepens and conversation is tough;
10: as hard as you can
And when you rest? Recovery between intervals (RBI) doesn't mean stop; it means go super easy and catch your breath. Aim for a PE of 1–2.