Fatigue Related Changes in the Body Motion and Force Application During the Performance of Consecutive Chin-ups (open access)

Fatigue Related Changes in the Body Motion and Force Application During the Performance of Consecutive Chin-ups

The purpose of this study was to examine the effects of fatigue on force application and resulting movement patterns during the performance of consecutive chin-ups. Special attention was directed toward relating any fatigue effects to upper limb strength dominance. Twenty male adult subjects each performed one trial. Each trial consisted of consecutive chin-ups. Fatigue caused changes in the movement patterns, duration of movement and force applied through the supporting hands. Throughout the performance greater vertical forces were applied through the dominant upper limb segment with the application of these forces resulting in horizontal displacement of the total body center of gravity toward the dominant hand.
Date: December 1984
Creator: Hong, Der-Ming
System: The UNT Digital Library
Fear of Failure and Fear of Success: The Relationship of Achievement Motives to the Motor Performance of Males and Females (open access)

Fear of Failure and Fear of Success: The Relationship of Achievement Motives to the Motor Performance of Males and Females

The study was designed to determine the relationship between the psychological constructs of "fear of failure (FOF)" and "fear of success (FOS)" and motor performance in badminton. Forty-three males and fifty-one females in beginning badminton classes were administered the FOF and FOS scales, followed by three independent skills tests and a round-robin singles tournament. Conclusions were that FOF and FOS are two separate performance motives; FOF appears to be the dominant motive for females; both FOF and FOS are related to motor performance in face-to-face competition, while only FOS is related to performance in isolated skills.
Date: December 1982
Creator: Albury, Kevin W.
System: The UNT Digital Library
Initial Starting Posture and Total Body Movement-Reaction Time for Lateral Movement (open access)

Initial Starting Posture and Total Body Movement-Reaction Time for Lateral Movement

Eighteen subjects each performed fifty-five trials which consisted of assuming an initial stance and then in response to a visual stimulus running to either the left or right. For each trial both the foot width spacing and orientation of the feet were varied. Direct and indirect measurements were taken of selected temporal and kinematic parameters. The conclusions were that no interactions or differences exist among foot width spacing, foot orientation, and direction of movement; the jab step start is the preferred initial movement; the preferred foot width spacing is 46.6 centimeters; the preferred angular orientation of both feet is approximately 1.36 radians.
Date: August 1983
Creator: Darnall, Sylvia Pacheco
System: The UNT Digital Library
The Relationship Between Maximal Aerobic Capacity and Left Ventricular Function with Respect to Age (open access)

The Relationship Between Maximal Aerobic Capacity and Left Ventricular Function with Respect to Age

In this study, the relationship between maximal aerobic capacity (VO₂max) and left ventricular function was examined in two distinct age groups. A young group (20 - 30 years of age) and an elderly group (over 60 years of age) were compared. Left ventricular function was examined over wide variations in preload accomplished by 5º head-down tilt (TILT) for ninety minutes and lower body negative pressure (LBNP) to -40 mm Hg. with two-dimensional echocardiography. A greater response to an increase in preload (TILT) was related to high VO₂max levels in the young subjects but not in the elderly groups of subjects, suggesting that lower VO₂max levels of the elderly population affected the mechanism of response to the increased levels of preload. Additionally, in the elderly, greater reductions in ventricular volume reflected increased peripheral pooling due to decreased venous tone and/or increased venous compliance during LBNP and were related to increased VO₂max. In the young, VO₂max does not appear to affect the response to reduced preload.
Date: December 1981
Creator: Page, Kimberly Ann
System: The UNT Digital Library