To minimize the likelihood of injury and pain, it’s important to keep proper form and keep ergonomics top of mind to reduce pain, strain and injury in the process of doing your job.
For instance, back injuries are common during the repair process, so it’s important to protect your back from unnecessary strain.
When lifting batteries or other heavy objects from the engine compartment of a vehicle, lean into the vehicle, pressing your thighs against the fender. Then lift the object with both hands. Don’t reach. Keep your elbows close to your body and turn using your feet, not at your waist.
Lower the item onto a bench or workstation using your arms to lower it; don’t bend at your waist. Move the object to work bench and lower onto bench. Use arms to lower, and do not bend at waist. When inspecting under the dash, use mirrors. No need to get into an awkward position or twist your body to get under there –– use inspection mirrors instead.
Article From: https://www.tirebusiness.com/shop-floor-safety/ergonomics-shop-floor