When the body is doing a set rhythm, it expends less energy than when it's forced into multiple movements.

The idea is not to increase intensity, but to challenge your body by forcing it to recover more quickly.

The whole gym environment, especially if it's machine-based, focuses on very fixed, linear-path movements, but the body doesn't really work that way in real life.

If you are sedentary all week long, when you do hit the gym you've got a lot more ground to cover before you see real progress.

It could even be setting you up for injury if you have muscle imbalances.

I didn't have anything left in my body to use as fuel. I just felt dead. I had no energy after that. I puked out all my fluids and after that I was pretty dehydrated.