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Articles 1 - 10 of 10
Full-Text Articles in Life Sciences
Loading Force In Recreational Runners And Its Effect On Achilles Tendon Biomechanical Properties, Joshua K. Sponbeck
Loading Force In Recreational Runners And Its Effect On Achilles Tendon Biomechanical Properties, Joshua K. Sponbeck
Theses and Dissertations
Background: Achilles tendinopathy is a common debilitating running related injury. Achilles tendon loading force has been hypothesized as a contributor to Achilles tendinopathy. Loading force through the Achilles tendon during running is impacted by many factors such as footwear and foot strike pattern. Achilles tendon biomechanical (Achilles tendon cross-sectional area, thickness, echogenicity, stiffness, and T2*) responses to loading forces are variable and measurable in vivo. These responses impact the physiologic function of the tendon. Aims: 1) To evaluate baseline Achilles tendon biomechanical characteristics associated with a runner's habitual foot strike pattern. 2) To evaluate single running bout Achilles tendon biomechanical …
The Effects Of Experimental Anterior Knee Pain On Bilateral Ground Reaction Forces During Running, Emily Rachel Cronk
The Effects Of Experimental Anterior Knee Pain On Bilateral Ground Reaction Forces During Running, Emily Rachel Cronk
Theses and Dissertations
The purpose of this study was to examine the independent effects of anterior knee pain (AKP) on bilateral ground reaction force (GRF) during running, with a focus on GRF applied to the uninvolved leg, which, prior to this study, had never been evaluated. Twelve volunteers completed three data collection sessions, that corresponded to one of three conditions (control, sham, and pain), in a counterbalanced order. For each session, subjects ran for five minutes. For the pain and sham sessions, respectively, hypertonic and isotonic saline were infused into the infrapatellar fat pad of the right leg during the running, while no …
Acute Changes In Running Mechanics Across Footwear With Various Heel-To-Toe Height Differences, Daniel C. Moody
Acute Changes In Running Mechanics Across Footwear With Various Heel-To-Toe Height Differences, Daniel C. Moody
Theses and Dissertations
There are many different types of footwear available for runners in today's market. Many of these shoes claim to improve a runner's efficiency by altering their stride mechanics. Minimalist footwear claims to aid runners in running more on their forefeet whereas more traditional footwear provides more cushioning specifically for a heel-first landing. The purpose of this research was to determine if runners who were accustomed to running in traditional footwear would acutely alter their running biomechanics when they ran barefoot or in various types of minimalist footwear. Twelve subjects, who were accustomed to running in traditional 12 mm heel/toe differential …
Ambulation Speed And Corresponding Mechanics Are Associated With Changes In Serum Cartilage Oligomeric Matrix Protein, W. Matt Denning, Michael Becker Pardo, Jason G. Winward, Iain Hunter, Sarah T. Ridge, J. Ty Hopkins, C. Shane Reese, Allen C. Parcell, Matthew K. Seeley
Ambulation Speed And Corresponding Mechanics Are Associated With Changes In Serum Cartilage Oligomeric Matrix Protein, W. Matt Denning, Michael Becker Pardo, Jason G. Winward, Iain Hunter, Sarah T. Ridge, J. Ty Hopkins, C. Shane Reese, Allen C. Parcell, Matthew K. Seeley
Faculty Publications
Because serum cartilage oligomeric matrix protein (COMP) has been used to reflect articular cartilage condition, we aimed to identify walking and running mechanics that are associated with changes in serum COMP. Eighteen subjects (9 male, 9 female; age = 23 ± 2 yrs.; mass = 68.3 ± 9.6 kg; height = 1.70 ± 0.08 m) completed 4000 steps on an instrumented treadmill on three separate days. Each day corresponded to a different ambulation speed: slow (preferred walking speed), medium (+50% of slow), and fast (+100% of slow). Synchronized ground reaction force and video data were collected to evaluate walking mechanics. …
The Effects Of Indoor Track Curve Radius On Sprint Speed And Ground Reaction Forces, Jesse Tipasa Tukuafu
The Effects Of Indoor Track Curve Radius On Sprint Speed And Ground Reaction Forces, Jesse Tipasa Tukuafu
Theses and Dissertations
Sprinting on a curve is significantly slower than on a straightaway. Although the dimensions vary from track to track, indoor track curves are among the tightest curves that athletes will sprint at maximal speed. Previous studies have provided theories for how speed attenuation occurs when running on a curve. Yet, no previous research has determined how the variability of indoor track curve radii affects trained sprinters at maximal speeds. Purpose: To determine the differences in running speeds, ground time (GT), and medio-lateral (ML) impulse, with different indoor track radii. A secondary purpose was to understand the between-leg differences in GT …
Long-Distance Interval Training Following Pre-Cooling With An Ice Vest, Ronald L. Hager, Iain Hunter, Gary W. Mack, Andrew R. Tegeder
Long-Distance Interval Training Following Pre-Cooling With An Ice Vest, Ronald L. Hager, Iain Hunter, Gary W. Mack, Andrew R. Tegeder
Faculty Publications
This study evaluated how preparing for an interval workout, while wearing a cooling vest, affects core temperature (Tc), heart rate (HR), and interval time in long-distance runners. Nineteen male collegiate cross-country runners exercised under two different conditions: (a) wearing a Nike PreCool™ ice vest for one hour prior to the workout (30 minutes resting with the vest and 30 minutes while performing their warm-up); and (b) a control condition utilizing a traditional warm-up. Subjects performed 8 x 1000 m intervals. HR and Tc were measured prior to warm-up, immediately before the first interval, and after each interval. Tc measured before …
Gender Differences And Biomechanics In The 3000m Steeplechase Water Jump, Kassi R. Andersen, Bryan K. Lindsay, Iain Hunter
Gender Differences And Biomechanics In The 3000m Steeplechase Water Jump, Kassi R. Andersen, Bryan K. Lindsay, Iain Hunter
Faculty Publications
Since 1996, women have been competing in the 3000m steeplechase race internationally. Whenever women and men both compete in similar events with different equipment (the barriers are lower for women) consideration should be given as to how techniques should be coached differently. This study investigated the differences in water-jump technique between men and women after accounting for differences in running speed and which techniques led to maintenance of race pace through the water-jump. Eighteen men and 18 women were filmed at two major track and field meets during the 2004 season. Peak Motus 8.2 was used to digitize all seven …
Ground Reaction Force Differences Between Running Shoes, Racing Flats, And Distance Spikes In Runners, Suzanna Jean Logan
Ground Reaction Force Differences Between Running Shoes, Racing Flats, And Distance Spikes In Runners, Suzanna Jean Logan
Theses and Dissertations
To measure the differences in ground reaction forces between running shoes, racing flats, and distance spikes, twenty intercollegiate distance runners ran across a force plate at 6.7m/s (for males) and 5.74m/s (for females) in each of the three types of shoes. In order to control for differences in foot strike, only subjects who had a heel strike were included in the data analysis (N=16). Repeated-measures ANOVA and Tukey's post-hoc test (p<0.05) revealed loading rate and impact peak to be significantly increased in the flats and spikes compared to running shoes. Stiffness in spikes was significantly higher than in running shoes. Stance time in spikes and flats was decreased. These results can be used to better inform competitive runners, coaches, and trainers of the risks and performance benefits when determining the frequency and duration of the use of competitive footwear in training.
The Effects Of Wearing A Cooling Vest During The Warm-Up On Long Distance Interval Training, Andrew Robert Tegeder
The Effects Of Wearing A Cooling Vest During The Warm-Up On Long Distance Interval Training, Andrew Robert Tegeder
Theses and Dissertations
Purpose: Reducing body temperature before exercise is called precooling. Past research suggests that reducing body core temperature (Tc) slightly can result in improved running performance. This study evaluated the effects that warming up, while wearing a cooling vest prior to an interval workout, had on Tc, and interval time in long-distance runners. Methods: Nineteen healthy male collegiate cross-country runners were recruited for this study. Each subject warmed up and exercised under two different conditions: (a) an experimental condition in which subjects wore a Nike PreCool® ice vest during warm-up and (b) a control condition. Subjects performed a warm-up followed by …
Steeplechase Barriers Affect Women Less Than Men, Tyler D. Bushnell, Iain Hunter
Steeplechase Barriers Affect Women Less Than Men, Tyler D. Bushnell, Iain Hunter
Faculty Publications
Women began contesting the 3000 m steeplechase during the 1990’s using barriers of different dimensions than men. Whenever a new event is introduced for women, consideration should be taken as to whether different technique or training methods should be utilized. This study investigated three aspects of hurdling technique: 1) Differences in the ratio of the landing step to the penultimate step between men and women around each non-water jump steeplechase barrier, 2) differences in step lengths between the four non-water jump barriers, and 3) changes in the step lengths around the barrier throughout the race. The step lengths around the …