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StrengthBeginner
Single-Leg Leg Extension
Equipment
Machine
Target Muscles
Quadriceps
Category
Strength
Muscle Group
Legs
Force Type
push
Mechanics
isolation
Target Muscles
Quadriceps
Breathing
Exhale as you push the weight away from your body, inhale deeply as you return to the starting position.
Common Mistakes
- •Not using the full range of motion
- •Using momentum instead of controlled muscle tension
- •Not maintaining proper form throughout the movement
Safety Tips
- •Maintain proper posture and alignment throughout the movement
- •Use a spotter or safety racks when lifting heavy
- •Always warm up properly before attempting this exercise
Variations
- •Adjust the seat position to align the pivot with your joint
- •Use a slower tempo and squeeze at the peak contraction
- •Try one leg / one arm at a time
Alternatives
- •Choose another exercise that targets the quadriceps
Progressions
- •Master the basic form with bodyweight before adding external load
- •Increase the weight by 5-10% once you can complete all reps with clean form
- •Slow down the eccentric (lowering) phase to 3-4 seconds
- •Reduce rest periods between sets to increase workout density
- •Add an extra set or rep each week (progressive overload)
Regressions
- •Reduce the weight to focus strictly on technique
- •Decrease the range of motion if you feel joint discomfort
- •Increase rest intervals to ensure full recovery between sets
Beginner Tips
- •Master proper form before increasing weight
- •Focus on slow, controlled movements — don't chase speed
- •Start with 2-3 sets of 10-12 reps to build a solid foundation
- •Record yourself to check your form
Pro Tips
- Focus on the mind-muscle connection — consciously squeeze the target muscle at the peak of each rep
- Use a 2-1-3 tempo (2 seconds up, 1 second pause, 3 seconds down) to maximise time under tension
- Implement progressive overload by tracking every session and adding small increments