How to Test the Power Clean from Blocks: 800Hz IMU Protocol for Explosive Output

Elite weightlifters have been reported to maintain a mean bar velocity above 1.85 m/s in the block power clean even at 92% of their full clean & jerk 1RM (Comfort et al., 2019). The power clean from blocks isolates the second pull by removing the floor set-off, providing a clean window to evaluate the explosive component of the triple extension. Many strength coaches treat block work as a 'technical accessory,' but with an 800Hz IMU sensor it becomes one of the most diagnostic tests in the program. This guide walks you through how to deploy the PoinT GO 800Hz IMU sensor to capture bar velocity, peak power, and time-to-peak-velocity in the block power clean, and how to interpret those numbers across a 12-week strength block. The protocol is built for college, semi-pro, and federation-level athletes alike.

<p>The first step is choosing the right block height. Two standard options are used: below-knee (35–40 cm) and above-knee (50–55 cm). These heights represent meaningfully different force-velocity profiles, so longitudinal data must always be compared at the same height.</p><p>The PoinT GO 800Hz IMU sensor is mounted inside the bar sleeve or against the inner collar. The 800Hz sampling rate is roughly eight times higher than a typical 100Hz optical system, which avoids missing the short 150–250 ms acceleration window — directly addressing the 'temporal resolution problem' described by Suchomel & Sole (2017).</p><table><thead><tr><th>Block Height</th><th>Target Region</th><th>Expected Mean Velocity</th><th>Recommended Load</th></tr></thead><tbody><tr><td>Below-knee</td><td>Hamstrings/glutes</td><td>1.6–1.8 m/s</td><td>80–85% 1RM</td></tr><tr><td>Above-knee</td><td>Triple extension</td><td>1.8–2.0 m/s</td><td>70–80% 1RM</td></tr></tbody></table><p>Calibrate the sensor, then warm up with 5 reps empty bar, 3 at 60%, and 2 at 75%. For technique cues, see the <a href='/en/exercises/power-clean-technique'>power clean technique guide</a>.</p>

<p>The standard testing protocol uses a 5-step progressive loading scheme. At each load, perform 2–3 reps with 3–5 minutes of rest. This is an IMU-era adaptation of Garhammer (1993)'s original olympic-lift testing guidelines.</p><p><strong>Step 1:</strong> Start at 50% 1RM. Record MPV and peak velocity.<br/><strong>Step 2:</strong> Progress to 65%, 75%, 85%. Keep the fastest rep at each load.<br/><strong>Step 3:</strong> Identify the load (Pmax) at which peak power is maximized.<br/><strong>Step 4:</strong> Stop the test when velocity loss exceeds 10%.<br/><strong>Step 5:</strong> Export data and plot a force-velocity curve.</p><p>The PoinT GO platform automatically outputs MPV, peak velocity (PV), peak power (PP), time-to-PV, and bar displacement per rep. This multi-metric approach aligns with the framework in our <a href='/en/guides/autoregulated-training-velocity'>autoregulated velocity training guide</a> and compensates for the limits of any single metric. Cross-referencing with <a href='/en/exercises/hang-clean-power-development'>hang clean power development data</a> lets you pinpoint which segment of the pull is the weakest link.</p><p>Haff & Stone (2015) originally recommended averaging at least 3 reps for explosive-action testing, but modern IMU systems now allow reporting both the best single rep and the 3-rep average as parallel benchmarks.</p>

<p>The two headline metrics for the block power clean are peak velocity (PV) and peak power (PP). PV directly reflects the explosiveness of the second pull, while PP reflects absolute power output. Well-trained male athletes typically fall in the PV 2.0–2.3 m/s and PP 4500–5500 W range at 75–85% loads.</p><table><thead><tr><th>Level</th><th>PV (m/s) @ 80% 1RM</th><th>PP (W)</th><th>Time-to-PV (ms)</th></tr></thead><tbody><tr><td>Elite</td><td>2.20+</td><td>5500+</td><td>&lt;200</td></tr><tr><td>Advanced</td><td>2.00–2.20</td><td>4500–5500</td><td>200–250</td></tr><tr><td>Intermediate</td><td>1.80–2.00</td><td>3500–4500</td><td>250–300</td></tr><tr><td>Novice</td><td>&lt;1.80</td><td>&lt;3500</td><td>&gt;300</td></tr></tbody></table><p>A lengthening time-to-PV often points to ankle mobility deficits or a sloppy set-off. Cross-reference the <a href='/en/exercises/ankle-dorsiflexion-test'>ankle dorsiflexion test</a> to narrow down the cause. If absolute PP is fine but PV is relatively low, loading may be too heavy, suppressing the velocity-dominant adaptation.</p>

<p>How do you fold block power clean results into a 12-week strength block? Re-test every 4 weeks. A PV improvement of ≥0.05 m/s is considered a meaningful adaptation (Pareja-Blanco et al., 2017). When no improvement (or a regression) occurs, redistribute loading.</p><p>If Pmax (the load at which peak power maximizes) shifts rightward from 60% to 75% 1RM, a force-dominant adaptation has occurred and the next cycle should emphasize velocity work. A leftward shift indicates the opposite — bring back absolute strength work. This cycling strategy combines well with our <a href='/en/guides/1rm-calculation-methods'>1RM calculation methods</a> and the eccentric-training research piece.</p><p>Pre-competition, a 'speed-strength' day with above-knee block cleans at 70% for 3 sets of 3 reps works well. Use PoinT GO in real time and apply a velocity cut-off — terminate the set the moment PV drops below the day's target (e.g., 2.0 m/s).</p>