Sled One Leg Hack Squat
Sled One Leg Hack Squat Exercise Description
The Sled One Leg Hack Squat is a unilateral, machine-guided squat that emphasizes the quadriceps while the gluteus maximus and hamstrings assist with hip extension control. The fixed back pad supports the torso, allowing you to focus on lower‑body mechanics with reduced trunk demand compared to free squats. Because only one leg works at a time, it highlights side‑to‑side strength and control, encouraging consistent knee tracking and foot pressure. The movement pattern is a closed‑chain, knee‑dominant squat: you descend by flexing the knee and hip, then ascend by extending them while keeping the spine neutral. Proper execution prioritizes a braced core, heel contact, and the knee staying aligned with the toes throughout the range you can control comfortably. Depth is individualized—stop before the heel lifts, the pelvis tucks under, or alignment is lost. This variation is useful when you want targeted quad loading with stable guidance from the sled.
- Muscle Groups: Quads
- Target Muscles: Vastus Intermedius, Vastus Lateralis, Vastus Medialis
- Assisting Muscles: Adductor Magnus, Biceps Femoris - Long Head, Gluteus Maximus, Rectus Femoris
- Stabilizing Muscles: Gluteus Medius, Multifidus, Soleus, Transversus Abdominis
- Body Area: Lower Body
- Body Parts: Legs, Upper Legs
- Body Surface: Front, Inner, Side
- Body Symmetry: Unilateral
- Equipment: Sled Machine
- Exercise Patterns: Squat
- Exercise Type: Strength
- Functional Grouping: Knee Extensors
- Joint Involvement: Multi-joint
- Muscle Location: Deep Quad, Inner Quad, Outer Quad
- Movement Direction: Vertical
- Muscle Position: Anterior, Lateral, Medial
- Gender: Male
How To Do The Sled One Leg Hack Squat Exercise
‘- Adjust the machine’s safety stops and back pad so your hips and back contact the pad evenly.
– Stand on the platform with the working foot centered under the shoulder; toes forward or slightly turned out as comfortable.
– Lift the non‑working leg off the platform with the knee softly bent; grip the handles.
– Set a neutral spine, lightly retract the shoulder blades, and brace your core.
– Place full, even pressure through the whole foot—especially midfoot and heel.
– Unlock the sled.
– Inhale and descend under control by bending the working knee and hip; keep the knee tracking over the second–third toe.
– Keep the heel down and pelvis neutral; descend only as far as you can maintain alignment and balance.
– Exhale and drive the sled upward by pressing through the midfoot/heel, extending the knee and hip.
– Finish tall against the pad without hyperextending or snapping the knee into lockout.
– Re‑engage the safeties before stepping down; switch legs and repeat.
Sled One Leg Hack Squat Tips
‘- Adjust the safety stops and back pad so your hips and back make even contact with the pad before starting.
– Center your working foot under the shoulder with toes forward or slightly turned out as comfortable.
– Keep the non-working leg lifted off the platform with the knee softly bent so only one leg works.
– Set a neutral spine, lightly retract your shoulder blades, and brace your core against the pad.
– Maintain full, even pressure through the whole working foot, especially the midfoot and heel.
– Descend under control by bending the working knee and hip, keeping the knee tracking over the second–third toe.
– Only go as deep as you can keep the heel down, pelvis neutral, and alignment and balance consistent.
– Drive the sled up by pressing through the midfoot/heel while extending the knee and hip.
– Finish each rep tall against the pad without hyperextending or snapping the knee into lockout.
– Re-engage the safeties before stepping down, then switch legs and repeat.
Sled One Leg Hack Squat Beginner Introduction
The Sled One Leg Hack Squat is a single-leg, machine-based lower‑body movement that centers most of the workload on the quads while the glutes and hamstrings help control the hips. With the back resting against a support, the upper body stays relatively relaxed, so attention shifts toward how the working leg bends and straightens under the sled’s resistance. This setup often appeals to those who want the stability of a guided track while still challenging one side of the body at a time.
During the exercise, one foot remains on the platform as the knee and hip bend and straighten together, creating a squat‑like motion driven mainly by the front of the thigh. The non‑working leg stays off the platform, turning it into a true single‑leg effort. Because only one side moves the sled, differences between legs in strength, balance, or control tend to stand out. The movement places a strong emphasis on steady foot pressure, smooth control through the descent and rise, and a comfortably controlled range that maintains a natural back position and steady knee‑over‑toes alignment.