You can burn calories by loading groceries. Did you know that hauling shopping bags can develop sleeker shoulders than lifting weights.
The reasons: This chore requires a wider range of motion, which works to engage a greater number of muscle groups, (including the deltoids, trapezius and biceps) all at once.
Also, lifting groceries entails more opposition to gravity, which creates more resistance.
As a result, the body is forced to recruit more deep-tissue muscle fibers, leading to leaner, more defined muscles and speedier calorie burn.
To tone even faster: Focus on contracting your belly while loading bags to slim belly fat. But be sure to squat rather than bending at the waist when setting them down to avoid straining your back.