Quad exercises: which work your quad most?

The quadriceps straighten the knee. Squats, lunges, leg presses and leg extensions train them, and a deeper knee bend generally means more quad work.

Last reviewed 13 November 2026. Every study cited is listed at the end.

The muscles that make up your quads

• Rectus femorisThe middle muscle on the front of the thigh. It is the only one of the four that also crosses the hip, so it both straightens the knee and lifts the thigh.^[1]
• Vastus lateralis, medialis and intermediusThree muscles that start on the thigh bone and cross only the knee. They straighten the knee in every squat, lunge and leg press.^[1]

Exercises where the quad is a primary mover

Ranked by how much of the work the quad does in each exercise.

• Back Squatalso glutes, adductors
• Bulgarian Split Squatalso glutes, adductors
• Front Squatalso glutes, abs
• Goblet Squatalso glutes, adductors
• Leg Extension
• Leg Pressalso glutes, adductors
• Lungealso glutes, hamstrings
• Wall Sit
• Step-Upalso glutes
• Thrusteralso glutes, front delts
• Burpeealso chest, abs
• Sumo Deadliftalso glutes, adductors, hamstrings

Exercises that also work the quad

The quad assists in these, but is not the main target.

• Deadliftalso glutes, hamstrings, lower back (erector spinae)
• Farmer's Walkalso forearms, traps, abs
• Mountain Climberalso abs, hip flexors
• Hip Thrustalso glutes, hamstrings, adductors
• Hanging Leg Raisealso abs, obliques
• Sit-Upalso abs, hip flexors

How to train your quads: what the research shows

Squats build three of the four. In a randomised 10-week study, full and half squats both grew the knee-straightening muscles by about 5%, but neither grew the rectus femoris.^[2]

Add leg extensions for the rectus femoris. In a randomised study comparing equal training on Smith-machine squats or leg extensions, all three regions of the rectus femoris grew in the leg extension group.^[3] Leg extensions fill the gap squats leave.

Front squats if your knees complain. In a study of 15 trained adults, the front squat produced as much overall muscle activity as the back squat, with lower compressive forces at the knee.^[4]

Take long steps on lunges. In a study of 20 adults, lunges with a long step produced more quadriceps activity than short-step lunges.^[5] A wide-stance sumo deadlift also worked the quadriceps harder than a conventional deadlift in a study of 13 athletes.^[6]

Reps. Light and heavy loads built muscle about equally across studies when sets were taken close to failure; heavier loads built more maximal strength.^[7] A weight you can lift 6 to 15 times with good form, with the last two reps hard, is a practical range.

Sets. In a pooled analysis of 15 studies, more weekly sets per muscle led to more growth.^[8] Squats, lunges, leg presses and leg extensions all count.

Frequently asked questions

What is the best quad exercise?

A squat or leg press for the three vastus muscles, plus leg extensions for the rectus femoris, which squats grew little in a 10-week study.

Do I need leg extensions if I squat?

Not strictly, but squats did not grow the rectus femoris in one study, while leg extensions grew it in another.

Front squat or back squat for quads?

Both work the quads similarly. In a study of 15 trained adults, the front squat did so with lower forces at the knee.

Why do my knees hurt on squats?

Common causes are too much weight too soon or knees caving in. Reduce the load, push your knees out over your toes and build up gradually. If pain continues, see a professional.

Other muscle groups

Sources

1. OpenStax. Anatomy and Physiology 2e, section 11.6: Appendicular muscles of the pelvic girdle and lower limbs. Rice University, 2022. https://openstax.org/books/anatomy-and-physiology-2e/pages/11-6-appendicular-muscles-of-the-pelvic-girdle-and-lower-limbs
2. Kubo K, Ikebukuro T, Yata H. Effects of squat training with different depths on lower limb muscle volumes. European Journal of Applied Physiology, 2019; 119(9):1933-1942. https://pubmed.ncbi.nlm.nih.gov/31230110/
3. Zabaleta-Korta A et al. The role of exercise selection in regional muscle hypertrophy: a randomized controlled trial. Journal of Sports Sciences, 2021; 39(20):2298-2304. https://pubmed.ncbi.nlm.nih.gov/34743671/
4. Gullett JC, Tillman MD, Gutierrez GM, Chow JW. A biomechanical comparison of back and front squats in healthy trained individuals. Journal of Strength and Conditioning Research, 2009; 23(1):284-292. https://pubmed.ncbi.nlm.nih.gov/19002072/
5. Escamilla RF et al. Effects of step length and stride variation during forward lunges on lower-extremity muscle activity. Journal of Functional Morphology and Kinesiology, 2025; 10(1):42. https://pubmed.ncbi.nlm.nih.gov/39982282/
6. Escamilla RF et al. An electromyographic analysis of sumo and conventional style deadlifts. Medicine and Science in Sports and Exercise, 2002; 34(4):682-688. https://pubmed.ncbi.nlm.nih.gov/11932579/
7. Schoenfeld BJ, Grgic J, Ogborn D, Krieger JW. Strength and hypertrophy adaptations between low- vs. high-load resistance training: a systematic review and meta-analysis. Journal of Strength and Conditioning Research, 2017; 31(12):3508-3523. https://pubmed.ncbi.nlm.nih.gov/28834797/
8. Schoenfeld BJ, Ogborn D, Krieger JW. Dose-response relationship between weekly resistance training volume and increases in muscle mass: a systematic review and meta-analysis. Journal of Sports Sciences, 2017; 35(11):1073-1082. https://pubmed.ncbi.nlm.nih.gov/27433992/

This guide is general fitness information, not medical advice. Muscle involvement varies with form, grip and individual anatomy.