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Biomedical subjects

C A Morehouse

Publications and source records attributed to C A Morehouse.

9 recordsLinked to original sources
PubMed1978

Effects on traction of outsole composition and hardnesses of basketball shoes and three types of playing surfaces.

The purposes of this investigation were to determine the effects of outsole composition and hardness, playing surfaces and player weight on the dynamic torque, traction forces and static drag developed at the shoe-surface interface. Basketball shoes of polyurethane and elastomer outsoles, each of three different hardnesses, were tested on clean and dusty hardwood floor samples, and on a sample of an artificial gymnasium flooring. The tests were conducted using a laboratory apparatus which included a player leg assembly with simulation of two player weights. Dynamic torque, traction forces from side and rear impacts and static drag were measured at the shoe surface interface. The results indicated that in basketball the magnitude of the resistance forces and torques are influenced by the outsole material and outsole hardness of the shoes, the playing surface and player weights.

Body Weight↗
PubMed1975

Knee stability and knee ligament injuries.

Controversy exists on the relationship of knee ligament stability to knee injuries. Subjective evaluation of joint tightness or looseness has been proposed as a criterion for prescribing selective corrective strengthening or stretching exercises. Biomechanical studies of knee ligament stability were performed on 401 college football players from 1969 to 1971. Forty-three knee ligament injuries occurred during this period of time, 19 (44.2%) in "loose-jointed" players and 24 (55.8%) in "tight-jointed" players. Joint laxity tests were performed on 72 college football players; the distribution of college football players failing to perform each of the tests was quite different from that reported for professional football players. There was no relationship between the subjective joint laxity tests and the objective biomechanical tests of knee ligament stability. We conclude that it is not possible to predict knee injuries by subjective evaluations of joint laxity or by objective biomechanical knee ligament evaluations and that exercise programs based on subjective studies are therefore not sound.

Athletic Injuries↗
PubMed1975

Torques developed by different types of shoes on various playing surfaces.

The purpose of this investigation was to determine the effects of shoe type, playing surface, weight supported and stance position upon the torques developed at the shoe-turf interface. The study was predicated upon the assumption that many knee injuries are torque-related and due to foot fixation, either by rigid cleating or by excessive traction between the shoe and playing surface. A laboratory apparatus was designed to measure the torque developed by various shoe-surface combinations. Under investigation were 11 shoe types, three artificial surfaces and natural grass, two player weights, and two player foot-stance positions. Torque data were gathered using impact loading, with an impact energy that is probably often experienced under competitive playing conditions. Resulting data indexed the shoes according to the mean torques developed on each of the playing surfaces, and comparisons of torque data with field studies by other researchers suggested which shoe-surface combinations might be the most potentially hazardous.

Ankle Injuries↗