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Exercises
Exercises

Front Squats

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quadricepscompoundbarbelllower-body

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Squat with the bar held in front (front bar placement), working all four quads with adductor and glute assistance.

Detail

The front squat uses a "bar in front" placement (versus high-bar back squat and low-bar power back squat). All four quadriceps are involved. Squat as deep as your mobility allows while staying upright and in control (the source's "close to parallel" limit is outdated for healthy knees — see Squat Depth and Knee Safety (Deep Squats Are Not Inherently Dangerous)). Do not lock out the knee; keep proper spinal alignment (muscles in semi-isometric contraction, S-shape spine); keep feet about shoulder width apart. Understand the femur-length-vs-torso-length, knee-toe, hip-knee, and knee-foot relationships. Check the position of the bar.

Key facts

  • Primary Muscles: Vastus Lateralis, Vastus Medialis, Vastus Intermedius.
  • Secondary Muscles: Rectus Femoris, Adductor Longus, Adductor Brevis, Adductor Magnus, Gluteus Maximus.
  • Squat as deep as mobility allows with control; deep squats aren't inherently dangerous for healthy knees.
  • Bar in front position.

Connections

Sources

Historical reference · reference manual (page cited)
p.40p.120p.364p.712
Cited authorities in source: Yessis (1992).

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Atlas Connections

Femur Length vs. Torso Length (Squat Mechanics)
Long-femured lifters lean farther forward in the squat, shifting emphasis toward the glutes and erector spinae.
Gluteus Maximus
The strongest, largest muscle in the body; the primary hip extensor and a lateral rotator of the femur.
Hip Adductors
The hip adductors are the pectineus, adductor brevis, adductor longus, adductor magnus, and gracilis.
Knee Joint Range of Motion
The knee is a hinge joint that straightens to about 0° and, in healthy adults, bends to roughly 133–142° depending on age and sex (CDC reference data). The "90°" often quoted is the arc of a seated leg extension, not the knee's full range.
Knee-Toe Relationship
A squat-alignment concept balancing keeping the knees from passing the toes against keeping the spine vertical — the "happy medium."
Quadriceps
The four knee extensors — rectus femoris, vastus medialis, vastus lateralis, vastus intermedius (rectus femoris also flexes the hip); the leg-extension arc is ~90° (knee bent to straight).
Rectus Femoris
A 2-joint quadriceps muscle that flexes the hip and extends the knee.
Back SquatsClosely related
The high-bar back squat: the bar sits across the upper back, and the three vasti, gluteus maximus and adductor magnus drive you up from as deep as you can control.
Low-Bar SquatClosely related
Bar rests low across the posterior deltoids, forcing more forward lean and hip hinge than the high-bar back squat — shifting emphasis to the glutes, hamstrings, and adductor magnus, at some cost to knee-dominant quad (rectus femoris) involvement.
Intensity
The amount of weight (resistance) lifted — also shaped by speed, reps, sets, rest interval, and workout duration.
Bar Placement in the Squat (High / Low / Front)
Three squat bar positions — high bar (Back Squat), low bar (called "Power Back Squat" in the source; known today as the low-bar squat), and bar-in-front (Front Squat) — each set a different line of force and require proper alignment.
Deep Knee Bend / Lunge / Squat — Contraindicated Ballistic Stretch
Bouncing or forcing into deep knee bends, lunges, or squats as a stretch is marked "X" in the source (said to strain the knee's lateral ligaments, compress the kneecap, and pinch cartilage). This is about ballistic end-range stretching, not controlled deep squats, which are safe for healthy knees.
Squat Depth and Knee Safety (Deep Squats Are Not Inherently Dangerous)
For people without knee pathology, squatting deep with good technique and appropriate load is not inherently dangerous to the knee, and it builds more glute and adductor muscle than half squats. Depth should match the individual's mobility, not an arbitrary "parallel only" ceiling.