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1 Rep Max (1RM) | Fitness, Health and Exercise Glossary

What is the definition of 1 Rep Max (1RM) and what does it mean?

1 Rep Max Definition

1 Rep Max (also know as One Repetition Maximum or 1RM) is the standard measure of muscular strength. 1 Rep Max measures the maximum amount of weight that a given muscle can move through a complete contraction (eccentric and concentric) one time, with good form.

1 Rep Max is used in weight training to determine maximum strength and as a way to calculate the upper strength limits when developing a weight and resistance training program. In these cases, a percentage of 1RM may be used to develop target load levels for measuring and/or improving things like muscular endurance (typically 75-90% of 1RM.)

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5 Components of Physical Fitness | Fitness Tips & Guides

What Is Physical Fitness? Understanding the Five Basic Components of Physical Fitness Can Be The Difference Between Fitness Success & Failure.

What does it mean to be “physically fit?”

Ask a dozen people to describe to you a person who typifies the concept of “physical fitness” and you will likely get 12 different answers.

Many people will probably mention Olympic athletes as paragons of physical fitness — people like swimmer and Olympic Gold Medalist Michael Phelps or U.S. gymnast Shawn Johnson. Others might point to professional athletes like NBA forward LeBron James or legendary NFL running back Herschel Walker. Other people might say that fashion models, certain actresses or actors, bodybuilders or even professional wrestlers represent “physical fitness.”

So clearly, physical fitness is in the eye of the beholder.

Or is it?

Can You Look “In-Shape” But Not Be Physically Fit?

While excelling at some type of athletic activity — whether you are a professional or amateur — requires a certain level of physical fitness, it doesn’t guarantee that they are physically fit. 

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What Does Muscular Strength Mean? | Fitness, Health & Exercise Glossary

What Is Muscular Strength and How Is It Measured?

Definition of Muscular Strength

Muscular strength is defined as the maximum amount of force that a muscle can exert against some form of resistance in a single effort. 

This is in contrast to muscular endurance, which represents multiple muscle contractions or a sustained muscle contraction over a period of time, for example during running, climbing or performing multiple reps with a dumbbell at the gym.

Practically speaking, you use muscular strength when you lift yourself out of a chair, pick up a heavy object, or push a piece of furniture. In the gym, a single repetition at a given weight is an example of muscular strength.

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