Anderson Squat (Pin Squat) Complete Guide

When Paul Anderson set the world record squat of 1,160 lb in 1957, he was already training the movement pattern now named after him: a squat initiated from a dead stop at the bottom of the range of motion, eliminating the eccentric loading and stretch-shortening cycle that most athletes depend on to drive through their sticking points. Modern research by Pereira et al. (2020) confirms that dead-stop squat variants produce 20–35% greater rate of force development from full hip flexion compared to traditional continuous squats — a training effect with direct carryover to powerlifting, Olympic lifting, and any sport requiring force production from low joint angles.

This guide covers the exact mechanics, pin-height selection logic, load prescription, and velocity-based monitoring for the Anderson squat.

What Is the Anderson Squat?

The Anderson squat — also called the pin squat or dead-squat — is performed by setting safety pins at the desired bottom position inside a power rack, resting the barbell on the pins, descending under the bar, getting into position, and then concentric-only driving the barbell upward from a complete stop. There is no eccentric phase, no stored elastic energy, and no stretch-shortening cycle (SSC) contribution.

This makes it mechanically distinct from the paused squat (which has a brief pause but retains pre-stretch) and from the box squat (which relies on momentary hip-flexor relaxation on the box). The Anderson squat is the purest test of starting strength — the capacity to produce force from near-zero velocity at a challenged joint angle.

Dead-Stop Mechanics and Why They Matter

In a conventional back squat, the SSC contribution at the bottom reversal adds 15–30% to the effective force output during the ascent. Athletes with strong elastic tendons (distance runners, Olympic-style jumpers) may derive even higher SSC contributions. This means the traditional squat conceals sticking-point weakness — athletes can muscle through the sticking point using stored elastic energy without ever developing the contractile strength needed at that angle.

The sticking point in the squat typically occurs at 60–70° of knee flexion on the way up — roughly one-quarter of the way through the ascent — where the mechanical disadvantage of the quadriceps moment arm is greatest and the hip extensors have not yet reached optimal length for force production. Anderson squats from a pin height set just below this sticking point force the nervous system to recruit maximum motor units from zero velocity at the weakest position, producing adaptations in:

• Isometric-to-dynamic rate of force development: The nervous system learns to go from rest to maximum recruitment instantly
• Position-specific strength: Muscle and tendon adaptation at the specific joint angle of the pin height
• Mental tolerance of maximal grind: The absence of momentum trains psychological tolerance for slow, high-force grinds that occur in competition attempts

Setup and Technique Step by Step

1. Pin Height Setting

Before loading, determine your sticking-point height. Perform an unloaded squat and have a coach identify where bar deceleration peaks on the ascent — typically 5–8 cm above the bottom of your competition-depth position. Set the safety pins so the bar sits 2–3 cm below this sticking-point height. This ensures the concentric phase crosses through the weakest position from a dead stop.

2. Bar Position and Bracing

Use a high- or low-bar position matching your squat competition style. Descend under the bar, establish foot position, and then build tension before unracking: deep breath into the abdomen, 360° brace, valgus-resist the knees outward. Do not initiate the lift until intra-abdominal pressure is maximal — the Valsalva maneuver here can add 5–15% to the bar velocity off the pins.

3. The Drive Phase

Think "push the floor away and the bar into the ceiling simultaneously." The hip-extension cue ("hips to the bar") prevents the common forward lean fault where the hips rise first, turning the movement into a good morning. Maximum intent on the drive is essential — submaximal effort Anderson squats do not produce the same RFD adaptation as maximal-intent reps.

4. Re-Racking Between Reps

Lower the bar back to the pins between every rep. Do not attempt touch-and-go, as this converts the movement back to a stretch-shortening pattern. Allow the bar to make full contact, re-brace, and initiate each rep from a true dead stop. Rest 3–5 seconds between reps within a set to allow elastic energy fully dissipate.

Pin Height Selection for Different Goals

Pin height determines which quality is targeted. The following guidelines use percentage of squat depth as reference, where 100% = full competition depth (hip crease below knee).

Load Comparison: Anderson vs. Back Squat

Due to the absence of elastic energy, most athletes use significantly less absolute load on the Anderson squat compared to their conventional back squat. The table below shows typical load ratios observed in trained powerlifters (Pereira et al., 2020):

If your ratio is below 65%, it indicates a disproportionately large SSC contribution to your conventional squat — your muscles are weaker than your tendons at the sticking point. Anderson squat training should be prioritized. If your ratio is above 85%, you already have strong dead-stop starting strength; other squat variations may provide more marginal gains.

Programming the Anderson Squat

The Anderson squat is neurally demanding and should not replace the competition squat. Use it as a primary accessory in a 4–8 week block, 1–2 times per week, after any technique-based primary squatting work.

Strength-Focused Block (4–6 weeks)

3–5 sets of 2–4 reps at 75–90% of Anderson squat 1RM. Full rest (3–5 min). Prioritize maximum intent on every rep — submaximal Anderson squats are a wasted training session. Progress load by 2.5–5 kg when all planned sets are completed with bar velocity above 0.30 m/s at the top of the lift.

Peaking Block (2–3 weeks)

Reduce to 2–3 sets of 2 reps at 88–95% Anderson squat 1RM. This is competition preparation work. Watch for bar velocity below 0.22 m/s as a sign that the load is above the true 1RM — an accurate bar velocity reading prevents failed attempts in training that can undermine confidence.

Velocity Monitoring on Dead-Stop Squats

Velocity monitoring is particularly valuable on the Anderson squat because the absence of elastic energy means the force-velocity relationship is cleaner and more consistent than on conventional squats. There is no rep-to-rep SSC variability — only contractile ability.

Mean concentric velocity (MCV) norms for the Anderson squat at common relative loads (trained athletes, from Pereira et al., 2020):

• 70% 1RM: 0.50–0.65 m/s
• 80% 1RM: 0.38–0.50 m/s
• 90% 1RM: 0.22–0.35 m/s
• 1RM: 0.15–0.22 m/s

If a planned 80% rep produces MCV below 0.38 m/s, the actual load is above 80% — either 1RM has been overestimated or the athlete is carrying significant fatigue. Do not proceed to heavier sets until MCV at the warm-up load matches expectations. The PoinT GO sensor provides these readings in real time, removing the guesswork from Anderson squat loading decisions.