title: [The investigation of exercise-induced fatigue on pesticide spraying operation].
abstract: OBJECTIVE
  To evaluate the exercise-induced fatigue in operators during pesticide spraying based on surface electromyography (sEMC) signals and heart rate.
  
  
  METHODS
  The sEMG signals were recorded from the right trapezius, biceps brachii, extensor digitorum, and flexor digitorum of 19 operators by portable electromyography units during pesticide spraying using 3WS-16 manual sprayers. Meanwhile, the heart rate of operators was measured by the ambulatory blood pressure monitoring system. The changes in median frequency and heart rate were analyzed.
  
  
  RESULTS
  Pesticide spraying was defined as low-intensity labor. The median frequency of the right trapezius, biceps brachii, extensor digitorum, and flexor digitorum decreased significantly as pesticide spraying went on (P < 0.05). The body remained in a state of slight fatigue from 8 min after pesticide spraying began to the end of the operation.
  
  
  CONCLUSIONS
  The degree of exercise-induced fatigue of operators can be evaluated based on sEMG signals and heart rate during pesticide spraying.
authors.affiliation: Department of food science and engineering, Engineering College, Nanshan College, Yantai, Shandong Province 265713, China.
authors.forename: Mingmei
authors.initials: M
authors.lastname: Chi
authors.forename: Dong
authors.initials: D
authors.lastname: Qiu
authors.affiliation: E-mail: xiongkui@cau.edu.cn.
authors.forename: Xiongkui
authors.initials: X
authors.lastname: He
mesh_terms: D001132:Arm; D018660:Blood Pressure Monitoring, Ambulatory; D004576:Electromyography; D006225:Hand; D006339:Heart Rate; D006801:Humans; D018763:Muscle Fatigue; D018482:Muscle, Skeletal / Q000502:physiology; D016273:Occupational Exposure / Q000009:adverse effects*; D010575:Pesticides; D005082:Physical Exertion
chemical_list: D010575:Pesticides