Glossary of Terms


A nonprofit, nonpartisan membership organization that helps people 50 and over improve the quality of their lives.

Abdominals or "abs"

The collective name for the muscles on the front of the torso, below the chest.


Muscles of the hip that pull your legs apart.


Movement away from the middle of the body.

Absolute Strength

The maximum amount a person can lift in one repetition.


A device that uses a motion sensor to calculate physical activity levels.


A process in which certification of competency, authority or credibility is presented.

ACE Inhibitors

Medications that slow the activity of angiotensin converting enzyme (ACE), causing blood vessels to enlarge or dilate and a reduction of blood pressure.


A hydroxyl derivative that is used in medicine to relieve pain and fever.

Active Stretch

Muscles are stretched using contraction of the opposing muscle (agonist)