concentric contraction

Definition

A muscle contraction where the muscle shortens while generating force, like the upward phase of a bicep curl. The fun part of lifting where you actually look strong.

Example Usage

The concentric contraction is easy; it's the eccentric lowering phase that makes me question all my life choices.

Origin

From Latin 'concentricus' meaning 'having a common center,' adopted into exercise physiology

Fun Fact

You're approximately 40% stronger during eccentric contractions than concentric ones, which is why lowering weight is easier than lifting it.

Source: Biomechanics and exercise physiology textbooks

Related Terms

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mechanical tension

The force produced when muscles contract against resistance, considered a primary driver of muscle growth. The scientific explanation for why muscles get bigger when you make them work really, really hard.

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Drop Set

A technique where you reduce the weight and keep lifting until your muscles file a formal complaint with your nervous system. It's the gym equivalent of being asked "but are you REALLY done?" every time you think you've finished.

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Shredded

Having such low body fat that every muscle fiber is visible, making you look like an anatomy textbook that came to life. Getting shredded requires a diet so strict that you start having emotional relationships with rice cakes.

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plateau

That soul-crushing moment in your fitness journey when your progress flat-lines harder than a bad EKG, and no amount of burpees seems to move the needle. It's the training equivalent of purgatory, where your body stubbornly refuses to get stronger, faster, or leaner despite your continued suffering. Breaking through requires switching up your routine, because apparently your muscles got bored with the same old torture.

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bodyweight work

Exercises using only your body as resistance, from push-ups to pistol squats. The democratizing force of fitness that proves you don't need equipment to suffer, just gravity and determination.

⚽ Sports / Fitness

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muscle confusion

The controversial theory that constantly changing exercises prevents adaptation plateaus by 'confusing' your muscles. Muscles don't have brains and can't be confused, but this hasn't stopped fitness marketers from selling programs based on outsmarting your biceps.

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