Using the lower back to lift — not the legs
The initial drive must come from leg extension; pulling with the back risks injury.
Overactive muscles
Erector spinaeHamstrings
Corrective work
Foam RollErector spinae↗StretchHamstring stretch with strap↗The initial drive must come from leg extension; pulling with the back risks injury.
The arms should not push until the tire is above waist height; early push wastes the leg drive.