a) What factors affect the back compressive forces during lifting?

b) Most companies provide back belts to their workers lifting extremely heavy loads. Though back belts can reduce lower back compressive forces by 15 to 30 percent, many studies have proved that these belts should be used with caution as they have long term detrimental effects on the workers body. Refer to any source that you would like and provide a short summary on back belts (4-5 sentences at least). Hint: pp 174 in your textbook has a section on back belts.