What can be used to protect the lumbar spine when reading in bed or using a computer?

Some heavy manual workers will face lifting heavy objects or walking with heavy loads. For example, migrant workers' brothers need to do heavy work on the construction site, and the risk of lumbar injury is greatly increased. When lifting heavy objects, you should hold your breath, concentrate your waist strength and squat down. It is strongly recommended to use waist guards, just like weightlifters use waist guards to enhance the strength of lumbar spine and reduce the risk of injury.