BACKGROUND Although characteristics such as heart rate (HR) and blood pressure (BP) are commonly reported in studies of the relationship between fatigue and cardiac functioning, few reports examine how cardiac function parameters such as cardiac output (CO) and stroke volume (SV) relate to fatigue. This study examined the relationship between self-reported fatigue and hemodynamic functioning at...

The purpose of the present paper was to analyze the efficiency of an abbreviated, albeit objective posturographic test as an indicator of fatigue. Posturography was measured in 10 healthy adults (age 18-33 years, male/female 7/3). Baseline posturographic measurements were taken for each subject. Later, a shorter (3-min) posturographic test was administered 12 times during 25 h of sleep deprivat...

The high alloyed spring steel 51CrV4 is widely used in engineering applications with requirements on strength, durability, and safety. present paper contains experimental results regarding its microstructural characterization the mechanical behaviour, especially fatigue life of 51CrV4. Fundamental S-N curves at fully reversed tension-compression rotating bending have been determined covering wh...

A new class of non-totally symmetric functions which can be represented as simple regular symmetric arrays without redundancy is identified. Regular circuits are becoming crucialy important for deep submicron technologies, which needs new layout approaches to fully utilized their potential. The new class of functions contains the classes of totally symmetric and totally symmetric with mixed pol...

normal 0 false false false en-us x-none ar-sa background: the relation between vitamin d deficiency with depressive and fatigue symptoms in both multiple sclerosis (ms) patients and healthy population have been reported. to represent our regional achievement in this field we investigated the relation between vitamin d status with fatigue and depressive symptoms in ms patients. materials and met...

The aim of this study was to examine the relationship of a range of in-vivo whole muscle characteristics to determinants of endurance performance. Eleven healthy males completed a cycle ergometer step test to exhaustion for the determination of the lactate threshold, gross mechanical efficiency, peak power and VO2max. On two separate occasions, contractile and fatigue characteristics of the qua...

Lifetime and form factor are two critical concerns for emerging sensor platforms, particularly for applications such as implantable medical devices. The limited energy from power sources, typically either microfabricated batteries or scavenged energy, remains one of the biggest challenges for such platforms. Reducing power consumption can lower system volume and extend lifetime. To achieve very...

background: surface electromyography (semg) of muscles is a non-invasive tool that can be helpful in the assessment of muscle function and some motor control evaluations. a loss of force, known as muscle fatigue is accompanied by changes in muscle electrical activity. one of the most commonly used surface emg parameters which reflects paraspinal muscle fatigue during different tasks and positio...