What is the correct lifting guidance weight at knuckle height for males using short levers?

The correct lifting guidance weight at knuckle height for males using short levers is 20-25 kg because this range aligns with ergonomic principles that consider the biomechanics of lifting and the physical capabilities of the average male worker. Lifting at knuckle height minimizes strain on the back and utilizes the strength of the leg muscles, making it safer and more efficient.

This guidance is particularly relevant for short levers, which refer to using arms and legs effectively in lifting tasks. Such positioning allows for better leverage and a more stable center of gravity, which are crucial factors in preventing injuries. Engaging proper lifting techniques within the range of 20-25 kg can help maintain safety and health in manual handling practices.

When considering the other weight ranges below this correct answer, they may represent weights that are either too low for trained males at knuckle height, which can lead to inefficiencies, or too high, which could increase the risk of injury.