Abstract
This research had two purposes: to identify measures sensitive to fatigue development associated with low force, static exertions and to investigate the effects of aging on fatigue onset associated with low-level exertions of the neck musculature.
Fourteen subjects participated ranging in age from 20 to 62 years. The task consisted of a submaximal neck extension exertion held until fatigue. Based on the results of this experiment, it was found that:
Several measures are sensitive to fatigue induced during a low-level static exertion of the neck extensor muscles, including: discomfort, three EMG time domain and four frequency domain parameters when comparing groups based on age, results and interpretations of effects due to age may be directly be influenced by the choice of dependent measure (such as discomfort, maximum force, and potentially time to fatigue); regardless of age, some subjects may exhibit fatigue resistance at low exertions levels.
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