Design and Implementation of Football Player Training Management System Based on Intelligent Image

This article is aimed at studying the design and implementation of a football player training management system based on smart images. Based on the analysis of the importance of informatization for scientific football training, system performance requirements and intelligent image detection technology, the football player training management is designed. The overall architecture of the system, and the detailed design of each functional module of the system. It mainly includes football player information management module, football player training plan viewing module, training goal formulation module and training information feedback module. The realization of the training management system relies on intelligent image technology to detect and track athletes. Finally, the performance of the system was tested. The test results show that the expected response time of each module of the system when different numbers of users are accessed is within 3 seconds. The longest actual time is 2.64 s, and the actual shortest time is 1.18 s. It can be seen that the response time of the system meets the demand. At the same time, the system throughput rate meets the requirements of this article, and the user pass rate is also above 95%, indicating that the performance of the football player training management system designed in this article is better.

Asymmetry and changes in the neuromuscular profile of short-track athletes as a result of strength training

Background The purpose of this study was to identify the biomedical signals of short-track athletes by evaluating the effects of monthly strength training on changes in their neuromuscular profile, strength, and power parameters of the lower limb muscles. Muscle asymmetry, which can cause a risk of injury, was also evaluated. Methods and results This study involved female athletes, age 18.8 ± 2.7 years, with a height of 162 ± 2.4 cm, and weight of 55.9 ± 3.9 kg. Before and after the monthly preparatory period prior to the season, strength measurements were assessed through the Swift SpeedMat platform, and reactivity of the lower limb muscles was assessed with tensiomyography (TMG). The athletes were also tested before and after the recovery training period. In the test after strength training, all average countermovement jump (CMJ) results improved. Flight time showed an increase with a moderate to large effect, using both legs (5.21%). Among the TMG parameters, time contraction (Tc) changed globally with a decrease (-5.20%). Changes in the results of the test after recovery training were most often not significant. Conclusion A monthly period of strength training changes the neuromuscular profile of short-track female athletes, with no significant differences between the right and left lower limbs.

The Precarity of the Baton Pass

The chapter briefly surveys the status of black and white women athletes in the aftermath of Wilma Rudolph. By appearing to combine elite athleticism and appropriate femininity, Rudolph opened a cultural space for young white women to begin participating in track and field and other highly competitive sports. At the same time, the political and social ruptures of the mid- to late 1960s United States rendered black women track stars less resonant symbols of American identity, as demonstrated by the fate of the Tigerbelle sprint star who succeeded Rudolph, Wyomia Tyus. However, during the conservative culture of the 1980s, black women track athletes would reemerge as icons of Americanness. Black American track women thus are barometers of the boundaries of American belonging, with their variable periods of visibility and invisibility revealing much about the relationship between race, gender, sexuality, and national identity.

Introduction

This introductory chapter considers the symbolic significance of the baton pass in a track and field relay, using this moment of possibility and precarity to encapsulate the experiences and influence of black women track athletes in the postwar United States. Despite the perpetual precarity of the marginalized sport of women’s track and field, young black women who competed in the sport navigated barriers of race and gender to find possibilities. As they repeatedly represented the United States in international sporting events, they would contest, challenge, and confirm the racial and gender conceptions of American identity. On and off the track, young black women track and field athletes were active agents in the remaking of Americanness.

Passing the Baton toward Belonging

This chapter analyzes how the colliding demands of the Cold War and civil rights movement began to endow black women track athletes with propagandistic purpose, as demonstrated by the interpretations of their presences and performances at the 1955 Pan-American Games and 1956 Olympic Games. The “double burden” of race and gender now made them powerful symbols of the promise of American democracy. Black American sport culture also more enthusiastically embraced black track women as race women, recognizing them as active contributors to the effort for black rights. Yet, these altered understandings of black women athletes were not possible without the athletes themselves, especially Mae Faggs, who modeled the often-overlooked agency of young black women.

An Epidemiological look into Hamstring Injuries in the Jamaican Athletic Population

Objective: To take an epidemiological look into hamstring injuries in Jamaican athletes presenting to the University of the West Indies (UWI) Sport Medicine Clinic between 2007 and 2016. The research focused on the contribution of certain demographics and types of sports and activities to the classification, recovery and recurrence of these injuries. Methods: A retrospective chart review was conducted on all the athletes who presented to the UWI Sports Medicine Clinic between 2007 and 2016. An electronic data extraction sheet was used for data collection. The target population consisted of athletes from 13 to 25 years of age who participated in competitive sports at the time of injury. Results: Of the 125 dockets reviewed, 92 were males (73.6%), 30 were females (24%) and three were of unknown sex (2.4%). In summary, 62.4% of the injuries occurred in the 17-21 years age group, 24.8% in the 22-25 years age group and 12.8% in the 13-16 years age group. Seventy-six percent of injuries occurred in Track athletes. Running/sprinting activities were culpable for most of the injuries (42%). Of the 134 injuries, 15.7% were low, 7.5% occurred in the muscle belly, 4.5% were high and the others were unspecified. Fifteen athletes (11.2%) had subsequent recurrences with the highest recurrence rate amongst Track & Field athletes. Only 3 of 21 low injuries and 1 of 6 high injuries recovered within 6 weeks. Conclusion: Hamstring injuries are common in Jamaican athletes with a significant male preponderance. Track & Field athletes, those in the 17 to 21 years age group and those engaging in running or sprinting activities were more likely to sustain injuries. It was difficult to compare the recovery rates of high and low injuries and recurrence rates were found to closely match those in current literature.

The Effects of Loaded Plyometric Exercise during Warm-Up on Subsequent Sprint Performance in Collegiate Track Athletes: A Randomized Trial

Prior evidence demonstrates the efficacy by which plyometric activities during warm-up conditions augment the subsequent performance in power-centric exercise. We investigated the acute effects of loaded jump squats incorporated into a standard sprinters’ warm-up protocol on subsequent sprint performance in collegiate track athletes. Sprint times of 22 male and female collegiate track athletes were measured in 10-m intervals during a 30-m sprint trial following a standard sprinters’ warm-up routine with or without plyometric exercise. Subjects were tested on two separate occasions, once with loaded jump squats as the experimental treatment (two sets of eight jumps, load = 13% bodyweight) (PLYO) and once with time-equated rest as the control treatment (CON). Treatments were implemented following a standard sprinters’ warm-up routine familiar to the subjects. A dependent T-test was used for comparison of sprint interval times between conditions with a significant effect indicated by a p-value < 0.05. Sprint time did not differ between CON vs. PLYO at the 10 m (PLYO = 1.90 ± 0.12 s vs. CON = 1.90 ± 0.11 s, p = 0.66), 20 m (PLYO = 3.16 ± 0.21 s vs. CON = 3.15 ± 0.19 s, p = 0.53), and 30 m (PLYO = 4.32 ± 0.32 s vs. CON = 4.31 ± 0.28 s, p = 0.61) intervals. There was no interaction between treatment and sex, sex-specific ranking (above vs. below sex-specific mean), or sprint event (short vs. short–long vs. long) for 10 m, 20 m, or 30-m interval sprint times. At least within the limits of the current investigation, no evidence was provided to suggest that jump squats loaded at 13% bodyweight are an effective means to acutely potentiate sprint performance in collegiate track athletes. However, a further examination of responders indicates that the present loaded jump squat protocol may preferentially potentiate sprint performance in faster male athletes.