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

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

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.

Going into the year, our No. 1 challenge was to improve sales trends at Taco Bell and KFC, and I am encouraged by progress at both brands,