The same motions, hundreds of times an hour, at the pace of the line.
Assembly and production work repeats a short cycle of motions all shift, often standing, often at speed, and often around loud machines. Hands, wrists and shoulders carry most of the cost, and shift work adds sleep problems.
Repeating the same grip, twist or reach every few seconds is one of the strongest risk factors for carpal tunnel syndrome, tendinitis and shoulder problems. Cold temperatures and vibrating tools make it worse.
Standing in one place all shift loads the feet, lower back and legs, and is linked to varicose veins.
Presses, conveyors and machinery often run at levels that damage hearing over a career. The loss builds slowly and is permanent.
Many plants run around the clock. Night and rotating shifts disrupt sleep and are linked to fatigue, accidents and long-term metabolic and heart risks.
Moving parts, blades and pinch points can cause amputations and serious cuts. Guards, lockout procedures and eye protection are the main defenses. Never wear gloves, loose sleeves or jewelry near rotating parts.
No daily practice fixes this one. Follow the steps described here.
See a doctor for numbness or tingling in your fingers, a weaker grip, wrist or shoulder pain that lasts more than a few weeks or wakes you at night, or ringing in your ears that doesn't fade. Report early symptoms at work; overuse problems are easier to treat when caught early.