Which action most directly reduces spinal load during lifting?

Which action most directly reduces spinal load during lifting?

• A. Lifting with a fast jerk
• B. Twisting the torso while lifting
• C. Keeping the load away from the body
• D. Keeping the load close to the body and within base of support

Answer: (D)

The amount of spinal load during lifting is driven by the torque the weight creates around the spine. When the load is close to the body, the distance (moment arm) from the spine is shortened, so the back muscles don’t have to generate as much force to hold and lift the weight. This also reduces spinal compression and stabilizes the spine. Keeping the load within your base of support further improves balance and prevents compensatory, awkward postures that can increase load. In contrast, moving the load away from the body lengthens the lever arm, twisting adds torsional stress, and a quick jerk spikes peak forces on the spine. So, keeping the load close to the body and within the base of support most directly reduces spinal load.

The amount of spinal load during lifting is driven by the torque the weight creates around the spine. When the load is close to the body, the distance (moment arm) from the spine is shortened, so the back muscles don’t have to generate as much force to hold and lift the weight. This also reduces spinal compression and stabilizes the spine. Keeping the load within your base of support further improves balance and prevents compensatory, awkward postures that can increase load. In contrast, moving the load away from the body lengthens the lever arm, twisting adds torsional stress, and a quick jerk spikes peak forces on the spine. So, keeping the load close to the body and within the base of support most directly reduces spinal load.