Leg Extensions

beginnerstrengthpushisolation
Leg Extensions — Machine Quadriceps exercise demonstration
Leg Extensions — Machine Quadriceps exercise demonstration
Body part
Upper Legs
Target
Quadriceps
Equipment
Machine

Instructions

  1. 1For this exercise you will need to use a leg extension machine. First choose your weight and sit on the machine with your legs under the pad (feet pointed forward) and the hands holding the side bars. This will be your starting position. Tip: You will need to adjust the pad so that it falls on top of your lower leg (just above your feet). Also, make sure that your legs form a 90-degree angle between the lower and upper leg. If the angle is less than 90-degrees then that means the knee is over the toes which in turn creates undue stress at the knee joint. If the machine is designed that way, either look for another machine or just make sure that when you start executing the exercise you stop going down once you hit the 90-degree angle.
  2. 2Using your quadriceps, extend your legs to the maximum as you exhale. Ensure that the rest of the body remains stationary on the seat. Pause a second on the contracted position.
  3. 3Slowly lower the weight back to the original position as you inhale, ensuring that you do not go past the 90-degree angle limit.
  4. 4Repeat for the recommended amount of times.

Get this via the API

This exercise — and the full catalog of 873 — as structured JSON.

GET /v1/exercises/{slug}
curl -H "X-API-Key: wk_live_…" \
  "https://api.work-out-db.com/v1/exercises/leg-extensions"

Customize the request

  • Translate the response
    /v1/exercises/leg-extensions?lang=es
    Localized name, description & steps — en · es · pt · fr
  • Every quadriceps exercise
    /v1/exercises?target=quadriceps
    Filter the catalog by the target muscle
  • Narrow by equipment & difficulty
    /v1/exercises?equipment=machine&difficulty=beginner
    Filters are combinable — stack as many as you need
  • Full-text search
    /v1/exercises/search?q=Leg%20Extensions
    Trigram + full-text ranking, accent-insensitive
  • Sort & paginate
    /v1/exercises?sort=difficulty&order=desc&limit=25
    sort=name|difficulty · order · limit · offset · cursor
All query parameters
bodyPart, target, equipment, muscle
taxonomy slug
category
strength · cardio · mobility · stretching · plyometrics
difficulty
beginner · intermediate · advanced
force
push · pull · static
mechanic
compound · isolation
q
free-text search (accent-insensitive)
sort / order
name | difficulty · asc | desc
limit / offset / cursor
pagination (limit ≤ plan cap)
lang
en · es · pt · fr
Authentication

Send your key as X-API-Key or Authorization: Bearer.

Response

Always { data, meta, requestId }. Rate-limit & quota counts ride in X-RateLimit-* / X-Quota-* headers.

Plans

Free: 5k req/mo · 30/min · 480p. Pro: 100k/mo · 120/min · 720p + commercial use.

Related exercises