Most standard leg exercises are "missing" a very important quad muscle. Here's how to target it to build stronger legs.
How To Do: Leg Extensions (Bad Form vs. Good Form)
Olympic Lifts and Dumbbells
The Worst Leg Exercises and What to Do Instead
Is the Knee Extension Machine Safe to use? - [P]rehab
Seated Machine Leg Extensions – WorkoutLabs Exercise Guide
3 Ways to Do Leg Extensions - wikiHow
Body-Solid Seated Leg Extension & Supine Leg Curl, Leg extensions and leg curls are high priority exercises with trainers, bodybuilders, and coaches.
Body Solid GLCE365 Seated Leg Extension & Supine Leg Curl
Merax Adjustable Leg Extension Machine, Leg Curl Machine with Rotary Leg Extension, 650lbs Total Home Gym Leg Press Workout Equipment : Sports & Outdoors
Bodybuilding Leg Workout for Mass (7 Exercises) – StrengthLog
Seated Dumbbell Leg Extensions for Strong Quads – WorkoutHealthy LLC
Why You Must Include the Seated Calf Raise Exercise
5150 SELECTORIZED SEATED LEG EXTENSION PRONE LEG CURL COMBO
10 Tips for Improving Leg Drive on Bench Press