Yea I think it's a combination of things.
I've been thinking about working sets the past few days and how to decide what weight to use for the main lifts. Traditionally I've done what most people do, increase the weight for each working set until the last set is as much weight as I can do for desired reps.
I got thinking, wouldn't it be better doing 3 sets of the same weight, and being more efficient. The difficulty is finding this perfectly balanced weight that won't be too light or too heavy for each set.
Lets take bench press.
Traditionally I'd do something like this.
Warm-up, 100x10, 110x8, 120x8.
In this example we could say not all these sets are the right effort level.
Here's a different approach.
Warm-up, 110x8, 110x8, 110x8
The first set would be easier than the last, which would require max effort. The benefit of sticking to this structure is the ability to increment the weight easier, and track progress. Sure I'm not lifting 120 in this example, but neither am I lifting 100.
The following week I would do 112.5x8x3 and so on. You always need to be progressive when training, either by increasing weight or reps.
What do people think?