• When muscles get tired, intensity (magnitude) (biceps brachii EMG power) goes up 
• Frequency goes down

• One Nerve Fiber and all muscle fibers innervated by that particular fiber
• One nerve fiber can control multiple muscle fibers
• Spinal nerve, spinal cord, cell body of neuron, nerve fiber, muscle fibers, myofibrils, sacromeres

Description

• Asymptote: If less than 15% then you can basically do the activity forever. 

• Contracting muscles squeeze blood vessels and don't allow blood to flow
• The mechanical action of static muscle contraction restricts blood flow through the muscle and forces anaerobic metabolism. 
• There is an increase, then a decrease in blood flow as grip contraction increases. 

• Measure electrical activity
• EMG Electromyogram - "Electricity" "muscle" "graph"

• Figure out where the workers are having issues
• Subjective "discomfort" survey
• Psychophysical

• Interjecting adequate rest between exertions
• most common

• Reduce sustained/static loads
• Evaluate static work postures to reduce the load moments on the various joints

• Soft and thick floor mats seem to reduce leg swelling and discomfort

• Local hot/jabbing pain
• Reduced motion control
• Increased tremor
• EMG decreases frequency increases amplitude
• Increased strain injuries