The Unilateral Isolation Fad Needs to Die: Why Single-Arm and Single-Leg Exercises Are Wasting Your Time ​Walk into almost any modern commercial gym and you’ll spot it immediately: people balancing on one leg with a light dumbbell, doing single-arm cable flyes, or performing single-leg extensions while their overall body composition remains soft and undeveloped. Somewhere along the line, mainstream fitness convinced lifters that functional strength means isolating limbs on un