Ratings of perceived exertion (RPE) and effort are considered extremely important in the regulation of intensity during self-paced physical activity. While effort and exertion are slightly different constructs, these terms are often used interchangeably within the literature. The development of perceptions of both effort and exertion is a complicated process involving numerous neural processes ...

Vibration exercise (VE) is a new neuromuscular training method which is applied in athletes as well as in prevention and therapy of osteoporosis. The present study explored the physiological mechanisms of fatigue by VE in 37 young healthy subjects. Exercise and cardiovascular data were compared to progressive bicycle ergometry until exhaustion. VE was performed in two sessions, with a 26 Hz vib...

OBJECTIVE To evaluate the controllability of, and physiological responses to, 2 newly designed unilaterally-propelled wheelchairs for patients with hemiplegia. DESIGN Within-subject comparison. SUBJECTS A total of 15 patients after stroke were recruited from the rehabilitation centre of Chung Shan Medical University, Taichung, Taiwan. METHODS Two newly designed wheelchairs (an ankle-prope...

Sleep- and caloric restriction as well physical exertion are common during combat, but the possibility that such operational stressors exert sex-specific effects on corticomotor system function is untested. PURPOSE: To examine corticospinal responses to simulated stress in men women. METHODS: Fifty-two military members (39 men; Age: 26 ± 6 yr, Height:174 9 cm, Weight: 80 13 kg, BF%: 22 7%) comp...

INTRODUCTION Law enforcement officers use conducted electrical weapons (CEW) such as the TASER X26 to control violently resistive subjects. There are no studies in the medical literature examining the effects of these weapons on the human stress response. This is the first study to compare the human stress response to conducted electrical weapons, oleoresin capsicum (O.C.), a cold-water tank im...

The aim of the present study was to compare kinetically the roles of the lower extremities in generating trunk rotation in the tennis one-handed and two-handed backhand strokes. Fourteen male collegiate tennis players, seven with a preference for the one- and seven with a preference for the two-handed technique, were recruited as participants. The motion of each backhand stroke was filmed using...

Human teeth are susceptible to pressure exertion ; the exertion of a constant low force between 0.1 and 0.5 N results in a change in tooth position ( Prof t, 1978 ). Therefore, tooth alignment in subjects who have not undergone orthodontic treatment is a product of an equilibrium of forces exerted on the teeth. Beside pressure from the lips ( Thüer and Ingervall, 1986 ), the cheeks , and the t...

ii 3 To my father iii 4 iv 5 Abstract The general aim of the thesis is to answer questions on general and differential aspects of perceived exertion and on the measurement of its intensity variation. Overall perceived exertion is commonly treated as a unidemensional construct. This thesis also explores its multidimensional character. Four empirical studies are summarized (Study I-IV). Psychophy...

The primary purpose of this study was to determine the influence of load compliance on time to failure during sustained isometric contractions performed with the elbow flexor muscles at four submaximal target forces. Subjects pulled against a rigid restraint during the force task and maintained a constant elbow angle, while supporting an equivalent inertial load during the position task. Each t...