Aerobic activity is a repetitive rhythmic exercise involving large muscle groups such as legs, shoulders and arms.

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The Occupational Safety and Health Administration recommends mixing noncomputer-related tasks into the workday, so that you're moving and using different muscle groups.

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One routine targets all muscle groups by lifting heavy weights through movements like squats, bench presses, bicep curls, tricep extensions, calf lifts and lateral pull-downs.

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Muscle activation: This phase involves four-second contractions of major muscle groups in the lower body, including calves, quadriceps, hamstrings, hip flexors, groin, and hip and lower back muscles to help athletes increase awareness of individual muscle groups.

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Extending the UnNap Nap To make the UnNap Nap as close to a nap as possible, do a mental scan of the body, focusing on different muscle groups one at a time, stopping at any that are feeling tense.

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Max Sick, a great early-nineteenth-century German strongman, had such complete muscle control that he could make the various groups twitch in time to music.

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For a while, the purchasing groups were winning this battle by using their muscle to demand lower premiums.

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If you study that moment, you will learn that Latinos flexed their muscle not just by coordinating among themselves, but by building broad coalitions with other groups with shared values.

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Santos visited the region last week, meeting with indigenous groups in the village of Toribio as members of the Revolutionary Armed Forces of Colombia flexed their muscle by setting up a checkpoint just outside the town.

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