--- id: snatch name: Snatch status: complete category: exercise pattern: [hinge] equipment: [barbell] difficulty: technical_complexity: 5 strength_prerequisite: 3 mobility_prerequisite: 5 muscles: - id: erector_spinae role: primary - id: vastus_lateralis role: primary - id: gluteus_maximus role: primary - id: multifidus role: primary - id: trap_upper role: primary - id: biceps_femoris role: secondary - id: semitendinosus role: secondary - id: rectus_femoris role: secondary - id: vastus_medialis role: secondary - id: deltoid_anterior role: secondary - id: triceps_brachii role: secondary - id: gastrocnemius role: secondary - id: soleus role: secondary - id: forearm_flexors role: stabilizer # Geisler 2023 measured Hang Power Snatch (HPS) — a proxy for the full snatch's # pull phase. The full snatch starts from the floor (adds first-pull demands) and # catches in a full overhead squat (adds quad/hip squat recovery demands not # captured here). Pull-phase activation is comparable; catch-phase ES values # reflect the overhead eccentric load, which applies to the full snatch catch equally. muscle_activation_studies: - source_id: geisler_2023 doi: "10.52082/jssm.2023.778" n: 10 population: "advanced" condition: load_pct_1rm: 50 phase: pull_and_catch notes: "Hang Power Snatch proxy; full snatch adds overhead squat recovery demand" measurements: - {muscle: erector_spinae, mean_pct_mvc: 175.69, sd: 134.95} - source_id: geisler_2023 doi: "10.52082/jssm.2023.778" n: 6 population: "elite" condition: load_pct_1rm: 50 phase: pull_and_catch notes: "Hang Power Snatch proxy" measurements: - {muscle: erector_spinae, mean_pct_mvc: 294.28, sd: 152.77} - source_id: geisler_2023 doi: "10.52082/jssm.2023.778" n: 6 population: "elite" condition: load_pct_1rm: 90 phase: pull_and_catch notes: "Hang Power Snatch proxy; peak ES values" measurements: - {muscle: erector_spinae, mean_pct_mvc: 371.62, sd: 271.60} joint_rom_required: hip_flexion_deg: 130 knee_flexion_deg: 135 ankle_dorsiflexion_deg: 38 shoulder_flexion_deg: 180 shoulder_external_rotation_deg: 90 shoulder_internal_rotation_deg: 70 notes: > Setup: 120° hip flexion (same as power snatch). Full squat catch is more demanding than the power snatch: requires 130–135° knee flexion, 38° ankle dorsiflexion at full depth. Overhead lockout: 180° shoulder flexion required throughout squat recovery. Thoracic extension mobility is a secondary limiting factor — restricted thoracic extension forces forward trunk lean, shifting the bar forward out of the midfoot line. source: "nasm_2020 / setpt_2020; squat depth from Schoenfeld 2010" strength_curve: type: bell_shaped sticking_point: first_pull_to_transition peak_force_position: second_pull notes: > Pull phase: bell-shaped GRF curve identical to power snatch — first pull ~1.5×BW, unweighting at double-knee bend ~1.0×BW, second pull peak 2.0–2.5×BW. The wider snatch grip (vs clean grip) shortens the effective pull height, requiring greater barbell velocity to achieve the catch. This is why snatch 1RM is consistently ~63–65% of clean-and-jerk 1RM across elite weightlifters. Catch/squat-recovery phase: ascending (same as front squat from deep position). ES at catch: elite, 90% 1RM: 372% MVIC — overhead eccentric stabilisation during the squat descent is the defining physiological demand of the full snatch vs the power snatch. source: "geisler_2023 / garhammer_1993" injury_risk: joint_stress: shoulder: high wrist: high lower_back: high knee: moderate common_injuries: - structure: rotator_cuff mechanism: eccentric_overload_at_catch_and_squat_recovery risk_factors: [insufficient_shoulder_flexion, restricted_thoracic_extension, fatigue] - structure: lumbar_disc mechanism: hyperextension_during_catch risk_factors: [excessive_lordosis, poor_bracing, bar_drifting_forward] - structure: knee mechanism: valgus_collapse_in_deep_squat_catch risk_factors: [insufficient_hip_external_rotation, weak_gluteus_medius, restricted_ankle_dorsiflexion] contraindications: - acute_shoulder_injury - lumbar_herniation - acute_knee_injury variations: [power_snatch] progressions: [snatch_pull, overhead_squat] alternatives: [power_snatch] sources: - source_id: geisler_2023 title: "Effects of Expertise on Muscle Activity during the Hang Power Clean and Hang Power Snatch Compared to Snatch and Clean Pulls" author: "Geisler S et al." year: 2023 doi: "10.52082/jssm.2023.778" credibility: rct - source_id: garhammer_1993 title: "A Review of Power Output Studies of Olympic and Powerlifting: Methodology, Performance Prediction, and Evaluation Tests" author: "Garhammer, J." year: 1993 doi: "10.1519/1533-4287(1993)007<0076:AROPOS>2.3.CO;2" credibility: literature_review - source_id: nasm_2020 title: "NASM Optimum Performance Training" author: "National Academy of Sports Medicine" year: 2020 credibility: expert_consensus - source_id: setpt_2020 title: "Weightlifting Series Part I: Improving Overhead Mobility" author: "Set Physical Therapy" year: 2020 credibility: practitioner - source_id: everett_weightlifting title: "Olympic Weightlifting: A Complete Guide for Athletes & Coaches" author: "Greg Everett" year: 2016 doi: null credibility: practitioner --- # Snatch The snatch is one of the two Olympic competition lifts. The barbell is pulled from the floor with a wide grip and received overhead in a full squat — simultaneously the most technically demanding and mobility-intensive movement in competitive strength sports. The bar travels from the floor to arm's length overhead in a single uninterrupted motion; the lifter descends into a full overhead squat to receive it, then stands to complete the lift. World-class performances require coordinating more than 30 joints and over 200 muscles within approximately 1 second. ## Execution 1. **Setup:** Wide snatch grip (roughly 1.5× shoulder width, measured by a forearm-length from the hip). Feet hip-width, bar over mid-foot. Hips below shoulders, shoulders over or in front of the bar. 120° hip flexion, neutral spine throughout. 2. **First pull (floor to knee):** Push the floor away; maintain constant back angle. Bar stays against the shins and thighs. 3. **Transition (double-knee bend):** As bar passes the knees, knees re-bend and hips drive forward — the torso angle rises and the bar accelerates toward the hips. 4. **Second pull (triple extension):** Explosive simultaneous hip, knee, and ankle extension. Shrug at peak. At full extension the body is vertical and slightly posterior; arms still long. 5. **Third pull (pull-under):** Simultaneously pull the body under the bar by pulling the elbows high and wide; the bar continues upward while the body drops into the overhead squat position. The bar must be locked overhead with elbows fully extended before the catch is complete. 6. **Overhead squat catch:** Receive the bar in a full squat — hips below parallel, bar directly over the midfoot, arms locked, torso upright. Stabilise the position before standing. 7. **Recovery:** Drive through the floor to stand while maintaining the overhead position; lower the bar to the thighs and then the floor. ## The Pull Phase: EMG Data The pull-phase erector spinae demand scales dramatically with expertise. At 50% 1RM: advanced athletes 176% MVIC, elite athletes 294% MVIC. This does not reflect greater brute force but rather superior motor unit synchronisation — elite lifters recruit more muscle simultaneously rather than sequentially, producing more force in less time. At 90% 1RM, elite erector spinae activation reaches 372% MVIC. This value reflects the full pull-and-catch cycle; the overhead squat catch portion contributes the eccentric deceleration component that elevates ES above the equivalent snatch pull (≈212% MVIC at similar loads). ## The Full Snatch vs the Power Snatch The critical difference is the catch depth: | Parameter | Power Snatch | Full Snatch | |-----------|-------------|------------| | Catch depth | ≥90° knee flexion (partial squat) | Below parallel (full squat) | | Maximum load | ~85–90% of snatch 1RM | 100% | | Mobility demand | Shoulder dominant | Shoulder + full squat + ankle | | ES at catch | High | Higher — longer eccentric overhead stabilisation during squat descent | The full snatch can handle more total load because the lifter does not need to generate enough bar height for a power (partial) catch — the bar only needs to rise high enough for the lifter to drop under it into a deep position. ## The 63% Rule Across elite weightlifters, snatch 1RM is consistently ~63–65% of clean-and-jerk 1RM. This ratio reflects the fundamental constraint of the snatch: the wide grip shortens the effective pull height, requiring greater barbell velocity to achieve a stable overhead catch. The clean grip's narrower width allows a higher bar trajectory at equivalent force input, enabling heavier absolute loads in the clean. ## Mobility Priorities The snatch is the most mobility-dependent barbell exercise. Deficits in any of these create compensatory faults that cannot be trained around: 1. **Shoulder flexion** (≥180°): Bar must sit directly over midfoot in the overhead squat; any restriction pushes the bar forward 2. **Thoracic extension**: Supports upright torso in the catch; restriction causes forward lean 3. **Ankle dorsiflexion** (≥38° at full depth): Restricts squat depth; forces heel rise and forward bar displacement 4. **Hip external rotation**: Determines squat stance width; restriction causes valgus collapse at depth Shoulder flexibility correlates significantly with trunk angle at depth (r = −0.67, p = 0.003): restricted lifters lean forward, which moves the bar off the midfoot line and destabilises the catch. > For system-specific training applications, see each system's lens entry.