ABSTRACT
The mechanism of occupational fatigue and disorders, especially in the neck/shoulder region, is a chief matter of discussion. Studies of muscle fatigue represent one of the oldest research fields in Ergonomics and work physiology. Disorder and complaints in the neck/shoulder region have been described as a common problem in general populations and many occupations(Makela et al. 1991), for example carpenters (Hammarskjoid et al. 1992) and sitting work (Hagberg and Sundelin 1986). These articles indicated especially the case during the work task demanded the arms to be lifted. Many occupational situations involve highly repetitive dynamic contractions, which have been identified as a risk factor for musculoskeletal complaints. However, reports in the agricultural workers are not as many as those in the industrial workers. In the farming work load, mechanical overstress is thought to cause localized muscular fatigue. The cultivation of grapes and keeping high quality have to relay on the manual work by well trained workers. Farming works often do heavy physical movements, and are endurable to muscle fatiguing work. Since 1975 the shape of the vineyard shelf was improved to Ytype for experimental farming. The purpose of this research is to evaluate the grape shelf from the human skeletal muscle load in the origin for the data of the labor for farming in actual fields.
