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The Effects of Surface Type on Experienced Foot Contact Pressures and Lower Limb Functioning During Running Performance (open access)

The Effects of Surface Type on Experienced Foot Contact Pressures and Lower Limb Functioning During Running Performance

The purpose of this study was to examine the effects of different surfaces on lower limb motion and encountered pressures at two locations on the plantar surface of the right foot. Nine females performed five trials for each of four surface conditions. The results provided no evidence for surface-related changes in experienced foot contact pressures. Both asphalt and grass surfaces resulted in the shortest relative time of forefoot immobility. No surface related differences were found for the range of pronation.
Date: December 1983
Creator: Denniston, Nancy L. (Nancy Louise)
System: The UNT Digital Library
The Acute Effects of Intermittent Running on Serum CK and LDH Enzyme Activities in Runners and Non-Runners (open access)

The Acute Effects of Intermittent Running on Serum CK and LDH Enzyme Activities in Runners and Non-Runners

Acute effects of repeated sprinting upon serum creatine kinase (CK), lactic dehydrogenase (LDH), and isozymal activities were studied in five collegiate runners (R_s) and six non-runners (NR_s ). After an intermittent running treadmill test, blood sampling showed three-fold mean increases in CK with no change in LDH in both groups; group differences were insignificant (p>.05). Results suggest (1) intense anaerobic exercise produces moderate enzyme elevations; (2) relatively equivalent exercise intensities are critical to enzyme responses in exercising individuals of varying fitness levels; and (3) exercise-induced enzyme release may be consequential to muscle cell membrane permeability changes from decreased intracellular high-energy phosphates.
Date: August 1983
Creator: Heffner, Kyle Daniels
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
Normative Assessment Technique for Bench Press and Leg Extension Strength in College Females on the Universal Gym (open access)

Normative Assessment Technique for Bench Press and Leg Extension Strength in College Females on the Universal Gym

This study was to develop normative data of isotonic muscular strength in college females using the Spartacus model Universal Gym bench press and leg extension and to control for the influence of body weight. Two hundred and two college age females enrolled in weight training and conditioning classes used the Universal Gym for twelve weeks. Subjects were tested for maximum strength on 2 exercises and their percent body fat was calculated. Pearson-product moment correlations between lean body weight , body weight and the bench press test and the leg extension test were correlated. After statistically controlling for the effects of body weight, percentile ranks were calculated for both tests.
Date: August 1983
Creator: Gibson, Jean
System: The UNT Digital Library