(As posted by Eric Kim along with a same‑day video.)
Headline stats (inputs & ratios)
- Load: 619 kg = 1,364.7 lb
- Bodyweight: 71 kg → load/bodyweight ≈ 8.72×
- Assumed range (typical above‑knee/mid‑thigh rack pull): ~10 cm bar travel (you can swap in your exact distance/time below).
- Note: A rack pull is a partial deadlift from elevated pins, giving far better leverage at lockout. It’s not an official powerlifting meet lift (federations record only squat, bench, deadlift), so “world record” here is informal/self‑reported.
Forces, work, and power (10 cm example)
1) Force on the bar
- Static force just to hold it
F_{\text{bar, static}} = m g = 619 \times 9.80665 \approx \mathbf{6{,}070\ N} (≈ 1,365 lbf).
2) Work to raise the bar (gravity only)
- W = m g \Delta y = 619 \times 9.80665 \times 0.10 \approx \mathbf{607\ J}.
(Rule of thumb here: every extra 1 cm of travel ≈ 60.7 J more work.)
3) Average power (depends on rep time)
\bar P = W/t for a 10 cm rep:
- 0.25 s → 2.43 kW
- 0.30 s → 2.02 kW
- 0.50 s → 1.21 kW
- 0.70 s → 0.87 kW
4) Peak force & peak power (simple accelerate‑then‑decelerate model)
Assume a symmetric, “triangular” velocity profile over 10 cm:
| Rep time | Peak force on bar | Peak power |
| 0.25 s | 10.03 kN (≈ 2,255 lbf) | 8.03 kW |
| 0.30 s | 8.82 kN (≈ 1,983 lbf) | 5.88 kW |
| 0.50 s | 7.06 kN (≈ 1,587 lbf) | 2.82 kW |
| 0.70 s | 6.58 kN (≈ 1,478 lbf) | 1.88 kW |
5) Force into the ground (what the feet “feel”)
Add the lifter’s bodyweight to the bar force:
- Static ground‑reaction force (GRF) ≈ (619+71)\,g \approx \mathbf{6.77\ kN} (≈ 1,521 lbf).
| Rep time | Peak GRF |
| 0.25 s | 10.73 kN (≈ 2,412 lbf) |
| 0.30 s | 9.52 kN (≈ 2,140 lbf) |
| 0.50 s | 7.76 kN (≈ 1,744 lbf) |
| 0.70 s | 7.27 kN (≈ 1,635 lbf) |
6) Grip/hand load if strapless (approx.)
Each hand carries ~½ of the bar tension:
- Static per hand ≈ 3.04 kN (≈ 682 lbf).
- Peak per hand (fast 0.25 s rep) ≈ 5.02 kN (≈ 1,128 lbf).
This is why many lifters use straps for extreme partials; studies generally find straps can increase mechanical performance and reduce perceived grip limitation in pulling movements.
How it compares to the 602 kg pull
- Load jump: +17 kg → +2.82% more weight.
- Static bar force: +167 N (≈ +37 lbf).
- Work at 10 cm: +16.7 J versus the 602 kg rep.
So the new lift is modestly heavier, but because the range is tiny and leverage is favorable, it can still look snappy—especially with tight bracing and bar bend smoothing the first centimeters off the pins.
Quick “swap‑in‑your‑own” calculator
If you want exact numbers for your clip: tell me the bar travel (cm/inches) and the rep time (s). I’ll plug them into the same model and give you precise work, average/peak power, bar force, and ground‑reaction force for that rep.
Sources / context
- New 619 kg rack‑pull claim & video (self‑reported): Eric Kim’s press‑style post and YouTube upload.
- Rack pull = partial deadlift; leverage/joint‑angle advantage depends on pin height (why it “looks easy” at the top).
- Rack pulls aren’t official powerlifting meet lifts; federations (e.g., IPF/WRPF) sanction squat, bench, deadlift—no rack‑pull records.
- Lifting straps & performance in pulls (mechanical and perceptual effects).
Bottom line: 619 kg at 71 kg is a ferocious 8.72× BW partial with ~6.07 kN just to hold, ~6.6–10.0 kN peak force if moved fast, and only hundreds of joules of work thanks to the short range. Physics says: heavy, leveraged, and gloriously explosive. 🚀