Background: Multiple sclerosis (MS) is the most prevalent autoimmune chronic disease globally. The current study was conducted to determine the relationship between fatigue severity and circadian rhythm sleep disorders among Iranian MS patients.  Methods: The statistical population of this cross-sectional study included MS patients who were members of the MS Association in Khorramabad City, so...

The full scale aircraft fatigue test(FSAFT)is crucial for determining the fatigue life (or service life based on flight hours) of an aircraft group and for understanding its performance during whole service life. So far, FSAFT is the only means in correctly obtaining the fatigue life of an aircraft group. The early locating and finding repairable cracks and damages in critical structures of the...

Objectives: This study aimed to investigate the effect of upper extremity coordination exercises based on fatigue prediction on fine and gross manual dexterity, upper limb motor function, shoulder and elbow proprioception, occupational performance, and activities of daily living in chronic stroke survivors. Methods: In this pilot double-blind randomized clinical trial, 24 chronic strokes were ...

Literature has not shown the minimum time required to recover from muscle fatigue after a prolonged trunk isometric contraction. The purpose of this study was to determine if the lumbar multifidus (LM) and gluteus maximus (GM) muscles would recover from fatigue after three different rest periods following performance of a back extension endurance test. Endurance time and electromyographic (EMG)...

The purpose was to construct a Test Influence Inventory (TII), which consists of two parts, the one is anxiety scale and the other is test fatigue scale. Subjects were 148 (76 males and 72 females) elementary school children. Factor analysis of TII, comprised from 25 items, yielded 5 factors, namely, (1) Emotionality factor (Em), (2) Body factor (Bo), (3) Nervous factor (Ne), (4) Worry factor (...

The aim of this study was to examine the rate of fatigue and sleepiness around the shift and non-shift workers and its relation to occupational accidents. This was a cross-sectional study on the workers of Iranian Industrial Mining Group. They included 137 shift workers as the case and 130 non-shift workers as the control. A multi-part questionnaire including demographic characteristics, Piper ...

The vibration fatigue durability of eutectic Sn37Pb and near-eutectic Pb-free Sn3.9Ag0.6Cu solders is quantified, based on test data available from the literature [1]. The tests use random broad-band excitation (between 20Hz & 2000Hz), on selected SAC and SnPb surface mount interconnect styles. In the test, step-stress excitation was applied in the out-of-plane direction by increasing the RMS e...