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