The Relationship Between Trunk Rotation Mobility And Sonographic Characteristics Of The Ucl In Female Collegiate Division I Golfers

Background: Softball pitchers have an eminent propensity for injury due to the high repetition and ballistic nature of the pitch. As such, trunk pathomechanics during pitching have been associated with upper extremity pain. The single leg squat (SLS) is a simple diagnostic tool used to examine LPHC and trunk stability. Research shows a lack of LPHC stability is often associated with altered pitching mechanics consequently increasing pain and injury susceptibility. Hypothesis/Purpose: The purpose of this study was to examine the relationship between trunk compensatory kinematics during the SLS and kinematics during foot contact of the windmill pitch. The authors hypothesized there would be a relationship between SLS compensations and pitch kinematics previously associated with injury. In using a simple clinical assessment such as the SLS, athletes, coaches, parents, and clinicians can identify potential risk factors that may predispose the athlete to injurious movement patterns. Methods: Fifty-five youth and high school softball pitchers (12.6±2.2 years, 160.0±11.0 cm, 60.8±15.5 kg) were recruited to participate. Kinematic data were collected at 100Hz using an electromagnetic tracking device. Participants were asked to complete a SLS on their stride leg (contralateral to their throwing arm), then throw 3 fastballs at maximal effort. Values of trunk flexion, trunk lateral flexion, and trunk rotation at peak depth of the SLS were used as the dependent variables in three separate backward elimination regression analyses. Independent variables examined at foot contact of the pitch included: trunk flexion, trunk lateral flexion, trunk rotation, center of mass, stride length, and stride knee valgus. Results: The SLS trunk rotation regression, F(1,56) = 4.980, p = .030, revealed trunk flexion significantly predicted SLS trunk rotation (SE = .068, t = 2.232, p = .030) and explained approximately 7% of variance (Adj. R2 = .066). The SLS trunk flexion regression, F(1,56) = 5.755, p = .020, revealed stride knee valgus significantly predicted SLS trunk flexion (SE = .256, t = 2.399, p = .020) and explained approximately 8% of variance (Adj. R2 = .078). Conclusion/Significance: Additional trunk rotation and trunk flexion at peak depth of the SLS indicate increased knee valgus and trunk flexion at foot contact of the pitch, both of which suggest poor LPHC stability, may increase the potential for injury. Athletes, coaches and clinicians should acknowledge the risk of poor LPHC in softball pitching and implement exercises to improve LPHC stability in effort to decrease pitching pathomechanics and associated pain.

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LAX-Score

Proceedings of the ACM on Interactive Mobile Wearable and Ubiquitous Technologies ◽

10.1145/3478076 ◽

2021 ◽

Vol 5 (3) ◽

pp. 1-28

Author(s):

Woosub Jung ◽

Amanda Watson ◽

Scott Kuehn ◽

Erik Korem ◽

Ken Koltermann ◽

...

Keyword(s):

Ncaa Division I ◽

Athletic Performance ◽

High Performance ◽

Performance Enhancement ◽

Ground Truth ◽

Division I ◽

Sports Science ◽

Player Performance ◽

The Relationship ◽

Game Performance

For the past several decades, machine learning has played an important role in sports science with regard to player performance and result prediction. However, it is still challenging to quantify team-level game performance because there is no strong ground truth. Thus, a team cannot receive feedback in a standardized way. The aim of this study was twofold. First, we designed a metric called LAX-Score to quantify a collegiate lacrosse team's athletic performance. Next, we explored the relationship between our proposed metric and practice sensing features for performance enhancement. To derive the metric, we utilized feature selection and weighted regression. Then, the proposed metric was statistically validated on over 700 games from the last three seasons of NCAA Division I women's lacrosse. We also explored our biometric sensing dataset obtained from a collegiate team's athletes over the course of a season. We then identified the practice features that are most correlated with high-performance games. Our results indicate that LAX-Score provides insight into athletic performance beyond wins and losses. Moreover, though COVID-19 has stalled implementation, the collegiate team studied applied our feature outcomes to their practices, and the initial results look promising with regard to better performance.

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An Assessment of Proximity of Fitness Facilities and Equipment and Actual Perceived Usage by Undergraduate University Students: A Pilot Study

Recreational Sports Journal ◽

10.1123/rsj.37.2.123 ◽

2013 ◽

Vol 37 (2) ◽

pp. 123-135 ◽

Cited By ~ 4

Author(s):

Rebecca Allen ◽

Craig M. Ross

Keyword(s):

Physical Activity ◽

Pilot Study ◽

Undergraduate Students ◽

Social Cognitive ◽

Cognitive Theory ◽

Division I ◽

Exercise Frequency ◽

Undergraduate University Students ◽

Intensity Of Exercise ◽

The Relationship

This pilot study examined the relationship between proximity of fitness facilities and equipment and actual perceived usage by undergraduate students at a Division I university, while acknowledging the role that Social Cognitive Theory plays in fitness. As a pilot study, the primary purpose was to gauge whether the study design and instruments used were appropriate for the overall purpose. Intensity of exercise, frequency of exercise, length of physical activity sessions, as well as a variety of other constructs were analyzed through correlational analysis to determine significance. The Godin Leisure-Time Exercise Questionnaire and the Perceived Environments Related to Physical Activity Questionnaire were modified for data collection. Findings of the pilot study revealed no significance in the proximity of fitness facilities and the amount of physical activity participation. However, the frequency of physical activity was significantly related to the availability of fitness equipment in an individual's home. Data collected from this study will be used to conduct further research on wider populations to investigate the proximity of fitness facilities and it's correlation with physical activity.

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The relationship between trunk rotation and shot speed when performing ice hockey wrist shots

Journal of Sports Sciences ◽

10.1080/02640414.2020.1853336 ◽

2020 ◽

pp. 1-9

Author(s):

Shawn M. Robbins ◽

Philippe J Renaud ◽

Neil MacInnis ◽

David J Pearsall

Keyword(s):

Ice Hockey ◽

Trunk Rotation ◽

The Relationship

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Athletes’ Perceptions of Their Team Motivational Climate, Career Exploration and Engagement, and Athletic Identity

Journal of Clinical Sport Psychology ◽

10.1123/jcsp.2014-0050 ◽

2015 ◽

Vol 9 (4) ◽

pp. 360-372 ◽

Cited By ~ 7

Author(s):

Kiira N. Poux ◽

Mary D. Fry

Keyword(s):

Self Efficacy ◽

National Collegiate Athletic Association ◽

Athletic Identity ◽

Career Exploration ◽

Motivational Climate ◽

Division I ◽

Sport Teams ◽

High Level ◽

Division I Athletes ◽

The Relationship

The purpose of this study was to examine the relationship between studentathletes’ perceptions of the motivational climate on their sport teams and their own career exploration and engagement and athletic identity. Student-athletes (N = 101) from various National Collegiate Athletic Association Division I institutions were administered online surveys. Canonical correlation analysis was used to examine the relationship between the climate variables (i.e., caring, task, and ego) and athletic identity, career self-efficacy, and career exploration/engagement. One significant function emerged: Perceptions of a high task-involving climate and moderate caring climate were positively associated with athletes’ reporting higher athletic identity, career self-efficacy, and career exploration/engagement. Results suggest that Division I athletes may benefit from having coaches who foster a caring and task-involving team climate with regard to the athletes’ development as holistic individuals who spend their college years performing at a high level of sport and also preparing for their lives after college and sports.

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Association of Upper Extremity Pain With Softball Pitching Kinematics and Kinetics

Orthopaedic Journal of Sports Medicine ◽

10.1177/2325967119865171 ◽

2019 ◽

Vol 7 (8) ◽

pp. 232596711986517 ◽

Cited By ~ 3

Author(s):

Gretchen D. Oliver ◽

Kenzie Friesen ◽

Jeff W. Barfield ◽

Kevin Giordano ◽

Adam Anz ◽

...

Keyword(s):

Upper Extremity ◽

Ncaa Division I ◽

Stride Length ◽

National Collegiate Athletic Association ◽

Tracking System ◽

Center Of Mass ◽

The United States ◽

Division I ◽

Trunk Rotation ◽

Kinetic Chain

Background: There is a paucity of research regarding the relationship between fastpitch softball pitching mechanics and reported pain. Thus, understanding the pitching mechanics of athletes pitching with upper extremity pain and those pain free is paramount. Purpose: To examine lower extremity pitching mechanics, upper extremity kinetics, and upper extremity pain in National Collegiate Athletic Association (NCAA) Division I female softball pitchers. Study Design: Descriptive laboratory study. Methods: A total of 37 NCAA Division I female softball pitchers (mean age, 19.84 ± 1.28 years; mean height, 173.67 ± 7.77 cm; mean weight, 78.98 ± 12.40 kg) from across the United States were recruited to participate. Participants were divided into 2 groups: upper extremity pain (n = 13; mean age, 19.69 ± 1.18 years; mean height, 172.60 ± 11.49 cm; mean weight, 86.75 ± 13.02 kg) and pain free (n = 24; mean age, 19.91 ± 1.35 years; mean height, 174.26 ± 4.96 cm; mean weight, 74.78 ± 9.97 kg). An electromagnetic tracking system was used to obtain kinematic and kinetic data during the riseball softball pitch. Results: At foot contact ( F 3,33 = 7.01, P = .001), backward elimination regression revealed that stride length, trunk rotation, and center of mass (COM) significantly explained about 33% of variance with softball pitchers experiencing upper extremity pain (adjusted R 2 = 0.33). Conclusion: At foot contact, the kinematic variables of increased trunk rotation toward the pitching arm side, increased stride length, and a posteriorly shifted COM were associated with upper extremity pain in collegiate softball pitchers. Variables early in the pitching motion that do not set a working and constructive proximal kinetic chain foundation for the rest of the pitch to follow could be associated with breakdowns more distal in the kinetic chain, possibly increasing the susceptibility to upper extremity pain. Clinical Relevance: The identification of pitching mechanics associated with pain allows clinicians to develop exercises to avoid such mechanics. Avoiding mechanics associated with pain may help reduce the prevalence of pain in windmill softball pitchers as well as help coaches incorporate quantitative biomechanics into their instruction.

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