StrengthIn review

Leg Extension

A seated machine exercise that extends both knees against resistance.

This page is a working draft. A coach has not reviewed it, so read it as a starting point, not as checked instruction.

Pattern: Knee extension
Modality: Strength
Difficulty: Beginner
Mechanic: Unknown
Force: Unknown
Laterality: Bilateral
Impact: Low
Trains where: Gym
At home: No

How to do it

Set up

Adjust the seat so the knees align with the machine pivot.
Place the lower pad above the ankles and secure your position.

Do the rep

Extend both knees and raise the pad in a smooth motion.
Lower the pad under control until you return to the start.

What counts as a rep

A rep counts when the knees extend to the machine stop and the pad returns to the seat-set start position.

One rep starts at the seat-set knee bend, extends both knees until the pad reaches the machine stop, and ends when the pad returns to the start position.

Breathing

Exhale as the knees extend; inhale as the pad lowers.

Cues

Keep the hips on the seat.
Move both legs together.
Control the return.

Common mistakes

Hips lift from the seat
What you seeThe pelvis rises as the legs extend.
FixUse less load and keep the hips against the pad.
Supported hips keep the load at the knees along the machine path.
Weight drops
What you seeThe pad falls quickly during the return.
FixReduce the load and lower through the full range.
A controlled return maintains tension and prevents the stack from slamming.

Stop the set if

Stop if you feel sharp pain.
Stop if the hips lift or the pad returns without control.
End the set when you cannot meet the stated range under control.

General educational content, not individual coaching or medical advice.

Muscles worked

Prime movers

Quadriceps · moderate confidence

Equipment

Selectorized machine

Align the machine pivot with the knees and place the pad above the ankles.

In the app

You log this by hand. The camera coach does not watch this movement yet.

Tracking: Camera candidate

How this page was checked

Draft. A editorial reviewer has not signed this off yet.

Technique, cues, rep standards, breathing, stop cues, and error corrections are original draft text. Independent technique sources and coach review remain required.
Anatomy, classification, and equipment use unapproved blueprint planning hints. The assigned review tier must confirm them.
Allowed metrics, side counting, and environment values are draft interpretations of the planning metadata.
This pass treats load-and-reps as the legal modes supported by the CSV logging model; reviewer approval remains required.
The rewritten summary, rep standard, breathing, stop cues, and common errors are editorial judgements pending the assigned review tier.
Legacy relations are movement-pattern and equipment judgements; engine edges remain empty pending S2-CAT-005 approval.
Pass 2 rewrites the finish standard as a counting-only criterion and replaces the web title, summary, and meta description with exercise-specific copy; these editorial choices require review.
Pass 2 defines a visible movement endpoint where the earlier draft relied on a vague range or control phrase; the endpoint requires coach review.

All instruction and editorial text in this record is original draft copy written for Allena. Planning metadata comes from the internal Wave-1 blueprint and exercise brief.

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