I've been training consistently for 3 years. Earlier this year, I was making progress almost every workout — hitting PRs and still getting solid reps on my following sets.
For example, I’d hit a PR on chest press with 70 lbs for 11 reps, and then get 8–9 reps on the next set with the same weight.
But recently, it’s been getting much harder to hit PRs, and the drop-off between sets has gotten way steeper.
Now, I might get 11 reps on the first set, but then only 5 reps on the second.
What could be causing this, and how should I approach it?