Which of the following is true regarding lifting techniques?

The preferred technique for lifting is to bend the knees and keep the back straight. This approach is essential for minimizing the risk of injury, particularly to the lower back. When you bend your knees, you engage the stronger muscles of your legs, which are better equipped to handle the load. This technique maintains the natural curvature of the spine, reducing stress on the back muscles and vertebrae.

Additionally, keeping the load close to the body while lifting helps in maintaining balance and control, further decreasing the likelihood of injury. Proper lifting mechanics prevent unnecessary strain and promote safer handling of materials, which is crucial in any environment where lifting is a regular task.

In contrast, relying solely on upper body strength can lead to improper lifting and increased risk of injury. Twisting while lifting can also cause torque strain on the back, which is harmful. Finally, while being close to the load can be a factor in some scenarios, it's not universally recommended as a safer practice compared to the proper bending and lifting technique.