How to Do Leg Extension: Muscles Worked & Proper Form
Which Muscles Do the Leg Extension Work? The leg extension is an isolation exercise for the quadriceps, especially for the rectus femoris. 1. The vastus muscles pass over only the knee joint, …
Leg Extensions: Targeted Muscle Groups And Workout Benefits …
Dec 9, 2025 · Leg extensions primarily target the quadriceps, a group of four muscles located at the front of the thigh: the rectus femoris, vastus lateralis, vastus medialis, and vastus intermedius. This …
Leg Extension Muscles Worked: A Complete Breakdown
Sep 13, 2024 · Understanding the specific muscles engaged during leg extensions is key to improving your form, targeting your quads more effectively, and preventing injury. In this guide, we’ll break …
Leg Extension Muscles Worked: Benefits, Risks, and Best Machines
Aug 29, 2025 · But before you jump into the movement, it’s important to understand the leg extension muscles worked, the benefits, and how to do them safely without hurting your knees. This guide …
Leg Extension - Proper Form, Technique & Programming | Gravitus
The leg extension is an isolation exercise that specifically targets the quadriceps muscles. This guide covers proper technique, variations, and programming strategies for both aesthetic development and …
Leg Extension: Muscles Worked, Alternatives, and Form
The leg extension effectively trains the four muscles of the quadriceps: The rectus femoris, vastus lateralis, vastus medius, and vastus intermedius. This makes it ideal for building muscle in your …
What Muscles Do Leg Extensions Work? - Biology Insights
Because the leg extension is an open-chain, isolation exercise, it effectively minimizes the involvement of other muscle groups like the hamstrings and glutes. This means the majority of the force required …
Seated Leg Extensions: Benefits, Technique, and Muscles Worked
Sep 22, 2025 · Strengthing your quadriceps via leg extension on machine or with a substitute (we'll detail some alternatives below) can build strength, size, and power — supporting stronger compound …
How To Do Leg Extensions The Right Way - PowerliftingTechnique.com
Mar 7, 2025 · The leg extension is one of the few exercises that works all four quadriceps muscles effectively. It’s particularly useful for bringing out the teardrop shape of the vastus medialis, which …
How To Perform Leg Extensions - E3 Rehab
Jul 27, 2025 · All four muscles insert on the tibial tuberosity via the patellar tendon (yellow) and act to extend, or straighten, the knee. The three vasti muscles originate from the thigh, whereas the rectus …