This might be one of the most important lessons I’ve learned as a...

Sometimes coaches become a slave to their program. They assume that because they wrote it down, they have to follow that plan. That mindset can be restrictive and even harmful.
Programming isn’t coaching.
Progression is rarely perfect or linear. Your program can’t be either. You’re dealing with a complex system, the human body. It’s unpredictable. You can make forecasts, but you’ll be wrong. Often.
That’s why you need a plan B. And a plan C. You have to be ready for whoever shows up that day. Ask how they feel. Watch their warm-up. Adjust accordingly.
Because training isn’t just about that day. It’s about that week. That month. That season.