Is Labrador a lazy dog?

When they're having a blast running around, they get this creepy low-butt-to-the-ground posture as they sprint like maniacs. Their ears flip inside out, and they look quite ridiculous. They also are totally lazy when they sit down.

Labrador is not Lazy Dog. As dogs get older, they require more energy to move around so they will naturally need to sleep more in order to recover.