Thigh
vastus intermedius
VAS-tus in-ter-MEE-dee-us
Deep central quad muscle under rectus femoris, extends knee powerfully. Core quad for squats and jumps.
Open in 3D ViewerCommon Pain & Injury
Deep thigh ache post-heavy legs; rare isolation.
Anatomy & Function
Origin
Anterior femur shaft.
Insertion
Tibial tuberosity via patellar ligament.
Actions
- Knee extension
Innervation
Femoral nerve
Muscle Relationships
Antagonists
Hamstrings
Synergists
Vastus lateralisVastus medialisRectus femoris
Trigger Points
Refers to knee anterior.
Stretches
1Standing quad stretch
Common Conditions
Quadriceps strainPatellar tendinopathy
Anatomical Parts
Right vastus intermediusLeft vastus intermedius
FAQ
Vastus intermedius location?
Deep middle quad under rectus femoris.
Vastus intermedius workout?
Squats and leg presses hit it hard.
Exercises for vastus intermedius
20
All Fours Quad Stretch
intermediate·Bodyweight
Alternate Leg Diagonal Bound
beginner
Backward Drag
beginner·other
Barbell Full Squat
intermediate·barbell
Barbell Hack Squat
intermediate·barbell
Barbell Lunge
intermediate·barbell
Barbell Side Split Squat
beginner·barbell
Barbell Squat
beginner·barbell
Barbell Squat To A Bench
expert·barbell
Barbell Step Ups
intermediate·barbell
Barbell Walking Lunge
beginner·barbell
Bear Crawl Sled Drags
beginner·other
Bench Jump
intermediate·Bodyweight
Bench Sprint
beginner·other
Bicycling
beginner·other
Bicycling, Stationary
beginner·machine
Bodyweight Squat
beginner·Bodyweight
Bodyweight Walking Lunge
beginner
Box Squat
intermediate·barbell
Box Squat with Bands
expert·barbell
Also Works vastus intermedius
10
Related Thigh Muscles
biceps femoris
The biceps femoris is the lateral hamstring on the back of the thigh, with long and short heads forming a thick band from hip to knee. It flexes the knee, extends the hip, and rotates the leg outward, vital for running, jumping, and deadlifts. Key for posterior chain power and injury prevention.
gracilis
Long, thin medial thigh muscle adducting and flexing knee. Aids cutting movements in soccer, stabilizing in squats.
iliotibial tract
The iliotibial tract (IT band) is a thick fibrous band down the outer thigh from hip to knee, stabilizing the leg during running and single-leg stands. Tight ITB causes knee pain in runners; mobility work prevents issues.
rectus femoris
The rectus femoris is the central quad muscle crossing both hip and knee, visible as the teardrop above your knee. It flexes the hip and extends the knee, powering sprints, jumps, and squats. Balanced development prevents knee pain in athletes.
sartorius
The sartorius is the longest muscle in the body, spiraling from hip to inner knee, forming a 'tailor's muscle' for crossing legs. It flexes, abducts, and rotates the hip plus flexes the knee, key for soccer kicks and agility drills. Balances quad-dominant training.
semimembranosus
The semimembranosus is a posterior thigh hamstring forming the teardrop at knee back, flexing knee and extending hip. Powers deadlifts, lunges, and deceleration in sports. Prevents ACL strains by stabilizing.
semitendinosus
Semitendinosus is the slender medial hamstring with a long tendon, flexing knee and extending hip. Aids in medial knee stability for cutting sports. Complements semimembranosus for balanced posterior chain.
vastus lateralis
Largest quad on outer thigh, massive knee extender for lateral stability in lunges and sprints.
Thigh Pain Guide
Common causes and relief
Activities & Sports
See which activities use vastus intermedius