Takeoff kinematics of axel jumps were determined from a spatial analysis of singles and doubles performed by 16 figure skaters. The takeoff was divided into glide, transition, and pivot phases. During the glide, horizontal speed remained constant, vertical velocity was slightly negative, and over half the angular momentum for flight was generated. In the transition, skaters gained considerable vertical velocity from tangential motion by rotating about the long axis of the blade, Initially this reduced the angle of the support leg with respect to the vertical while the blade ran in the direction of progression. Most skaters continued to gain vertical velocity by angling the blade to the direction of progression (skidding) and rotating up and forward, still about the blade's long axis. There was little angular momentum gain, and forward speed decreased significantly. In the pivot, skaters rocked forward onto the toe picks losing horizontal speed, vertical velocity, and angular momentum.
Wayne J. Albert and Doris I. Miller
Jerry R. Thomas, Damon Andrew, Patricia A. Moran, Wayne Miller, and Amelia M. Lee
In today’s challenging economic climate at most universities, kinesiology administrators are becoming increasingly aware of the need to participate in activities that will generate alternative revenue sources related to their academic mission. The ways deans and development officers communicate with alumni, potential donors, upper administrative leaders, and legislatures will all impact how successful the efforts to develop funds and partnerships will be. Successful fundraisers are those who can generate strategic alliances, create and market a plan that relates needs to societal issues of public interest and university priorities, and are able to identify partnerships that will produce an increase in resources. This paper provides strategies for identifying and connecting with key donors, building partnerships, developing the plan and cultivating internal and external audiences, aligning needs with university priorities, and working with legislatures.
Thomas P. Dompier, Craig R. Denegar, W.E. Buckley, S. John Miller, Jay Hertel, and Wayne J. Sebastianelli
Flexibility is promoted as essential to physical fitness, but the mechanisms limiting it are not fully understood.
To investigate the effects of general anesthesia on hamstring extensibility.
Hospital operating room.
Eight volunteers undergoing orthopedic surgeries unrelated to the tested limb.
Three measurements of passive knee extension (PKE) taken before and after administration of general anesthesia. The force applied during the measurements was consistent between trials.
Mean PKE range of motion (ROM) was significantly greater before anesthesia (75.0° ± 11.8°) than after (53.3° ± 17°; t = 5.6, P < .001). Pearson product correlation revealed a significant correlation between the mean difference in PKE ROM between treatment conditions and subjects’ body weight (r = .91, P < .05).
The findings might be attributable to diminished neural drive to the antagonist muscle groups and suggest a more complex neural control of flexibility than simply neural drive to an agonist muscle.