Race Record Research Articles

82 Relationships between performance traits and osteochondrosis of the hock in Standardbred racehorses

Abstract Equine osteochondrosis (OC) is a developmental orthopedic disease that results in abnormal articular cartilage and often the formation of osteochondral bone chips (osteochondrosis dissecans). Standardbreds, a breed predominately used in harness racing, are prone to the development of OC. This study aimed to quantify the relationship between OC and key performance traits, fastest mile time, annual earnings, and consistency in race times over career, using a cohort of 347 North American Standardbred horses. Radiographic examination of the tarsi was previously performed to identify horses as OC-affected (n = 155) or healthy (n = 192). Performance data was acquired from the United States Trotting Association (USTA) detailing horse identification, performance, and lifetime race record. Linear mixed multiple regression models were constructed to evaluate the relationship between OC and performance. A total of 24 performance related variables (e.g., age, gait, track) were evaluated for inclusion in the model through subset variable selection and goodness of fit as determined by Schwarz’s Bayesian Information Criterion (SBC). Preliminary results indicate that healthy horses exhibit significantly faster mile times (P < 0.001) compared with their OC-affected counterparts. However, no significant association was detected between OC status and annual earnings (P > 0.2) or consistency in race times over career (P > 0.2). Ongoing analyses are currently being conducted to assess additional predictors and performance variables for a potential association with osteochondrosis. This study emphasizes the importance of implementing effective strategies for OC management and improving breeding selection practices when producing offspring with desired performance characteristics.

The Impact of Neck Cooling on Serum Oxidant/Antioxidant Status and HSP70 Levels during High-Intensity Cycling.

Numerous studies have been conducted in an attempt to discover cooling strategies that can be effective in improving exercise performance. However, the mechanism by which neck cooling relieves exercise-induced physiological stress and the optimal cooling temperature are unclear. This study aimed to investigate the effects of neck cooling at different temperatures during high-intensity cycling on body temperature, physiological variables, oxidant/antioxidant status, heat shock protein (HSP) 70 levels, and exercise performance in adolescent athletes. Seven well-trained male adolescent cyclists (age, 17.00 ± 0.76 years; athletic career, 3.86 ± 0.90 years) participated in three exercise trials involving three cooling regimens: control (CON), low-temperature (7 °C) neck cooling (LNC), and mixed-temperature (14 + 20 °C) neck cooling (MNC). The experimental condition used a cross-over design to minimize adaption to the repetitive cycling trials. Cycling consisted of a 20 km warm-up session and a two 2 km race session. Neck cooling at different temperatures was administered for 20 min during each rest period: after the warm-up, after the first 2 km race, and after the second 2 km race. Blood samples were taken to assess serum malondialdehyde (MDA), superoxide dismutase (SOD), and HSP70 levels. In addition, tympanic temperature (Tty), thermal sensation (TS), heart rate (HR), and the saturation of percutaneous oxygen (SpO2) were measured before, immediately after, and 24 h after exercise. As a measure of cycling performance, the race record and speed were measured in the first and second 2 km races. In all trials, Tty, TS, HR, MDA, SOD, and HSP70 levels significantly increased (p < 0.05), and SpO2 levels significantly decreased (p < 0.05). TS significantly decreased 24 h after exercise compared to that immediately after exercise in the LNC and MNC trials (p < 0.05). Serum HSP70 levels were significantly higher 24 h after exercise (0.87 ± 0.10 ng/mL) than immediately after exercise (0.79 ± 0.04 ng/mL) in the CON trial (p < 0.05). Twenty-four hours after exercise, the CON (0.87 ± 0.10 ng/mL) trial showed significantly higher serum HSP70 levels than the LNC (0.73 ± 0.01 ng/mL) trial (p < 0.05). There was no significant difference in cycling race record or speed between the trials (p > 0.05). Our findings suggest that neck cooling can induce a positive effect on thermal perception during recovery after cycling and that neck cooling at a relatively low temperature may be more effective in reducing exercise-induced HSP70 expression.

Comparing the Performance Gap Between Males and Females in the Older Age Groups in IRONMAN® 70.3: An Internet-Based Cross-Sectional Study of More Than 800,000 Race Records

BackgroundThe sex difference in the three split disciplines (swimming, cycling, and running) and overall race times in triathlon races has mainly been investigated for the Olympic distance and IRONMAN® triathlon formats, but not for the half IRONMAN® distance, i.e., the IRONMAN® 70.3. The aim of the present study was to investigate the sex differences in IRONMAN® 70.3 by age group in 5-year intervals for the split disciplines of this race. Data from 823,459 records (625,393 males and 198,066 females) of all age group finishers (in 5-year intervals) competing in all official IRONMAN® 70.3 races held worldwide between 2004 and 2020 were analyzed, and sex differences by age group and split disciplines were evaluated.ResultsMales were faster than females in all split disciplines and all age groups. The sex difference was lower in swimming than in cycling and running and less pronounced for triathletes between 20 and 50 years of age. After the age of 60 years, females were able to reduce the sex difference to males in swimming and cycling, but not in running, where the reduction in the sex difference started after the age of 70 years. The lowest sex difference was in the age group 75 + years for swimming and cycling and in the age group 30–34 years for running. Across age groups, the sex difference was U-shaped in swimming and running, with an increase after 18–24 years in swimming and after 40–44 years in running. In contrast, the sex difference decreased continuously with the increasing age for cycling.ConclusionsIn conclusion, the study found that the sex difference in performance decreases with age in the IRONMAN® 70.3 race distance. However, females did not outperform males at older ages. Notably, sex differences were observed across different disciplines, with swimming displaying lower differences compared to cycling and running. These findings underscore the complex interplay between age, sex, and performance in endurance sports, emphasizing the need for additional research to understand the factors influencing these differences.

Blind Spots: Biases in Prehospital Race and Ethnicity Recording

Objective Inequities have been described in areas of prehospital care ranging from pain medication administration and scene time, to stroke and cardiac arrest management. Though a critical element in understanding inequity, race and ethnicity information are often missing from the prehospital patient care report. This study aimed to characterize and understand demographic trends among records with missing race and ethnicity information. Methods This before-and-after retrospective review compared patient care reports prior to and after an intervention that mandated the recording of patient race and ethnicity. Records with incomplete race and ethnicity information in the before group were evaluated to understand demographic patterns associated with this incomplete documentation. Results Among 98,725 patient care reports, race/ethnicity in the before period as compared to the after period was less likely to be documented in nonwhite patients (p < 0.001), younger patients (p < 0.001), male patients (p < 0.001), and non-emergent transports (p < 0.001). Conclusions When compared to data after the implementation of mandated race and ethnicity fields, missing race and ethnicity data were found to be more common in patients of color, younger patients, males, and those transported non-emergently. Inconsistent completion of race and ethnicity documentation may lead to a poor understanding of equity issues within a system, suggesting a need for mandatory race and ethnicity fields.

Effects of 4-week Training Using Laboratory Index on Competition Record of Elite Female Middle-distance Runner: A Case Report

PURPOSE: To investigate the effect of a 4-week training using a laboratory index on the competition record of elite female middle-distance runners.METHODS: A female, middle-distance, trained runner with the following characteristics: age, 20 years; height, 168.7 cm; weight, 64.3 kg; 27.2% fat; and VO&lt;sub&gt;2&lt;/sub&gt;max, 56.4 VO&lt;sub&gt;2&lt;/sub&gt; mL/kg/min; volunteered to participate in this study. Before the training program, the participant took part in a 1,500-m track and field national event in April and the onset of blood lactate threshold was analyzed using (OBVA/ vOBLA), VO&lt;sub&gt;2&lt;/sub&gt;max/vVO&lt;sub&gt;2&lt;/sub&gt;max, and tVO&lt;sub&gt;2&lt;/sub&gt;max tests. After completing the 4-week training program, the participant again took part in the 1,500-m track and field national event in May and her parameters were reassessed using the OBVA/vOBLA, VO&lt;sub&gt;2&lt;/sub&gt;max/vVO&lt;sub&gt;2&lt;/sub&gt;max, and tVO&lt;sub&gt;2&lt;/sub&gt;max tests.RESULTS: Pre- and post-training indicate that vVO&lt;sub&gt;2&lt;/sub&gt;max did not improve; however, tVO&lt;sub&gt;2&lt;/sub&gt;max (206 seconds pre-training vs. 251.51 seconds post-training) and VO&lt;sub&gt;2&lt;/sub&gt;max (56.4 vs. 59.3 VO&lt;sub&gt;2&lt;/sub&gt; mL/kg/min)significantly. However, this improvement in relative VO&lt;sub&gt;2&lt;/sub&gt; was due to weight loss, and the absolute value of VO&lt;sub&gt;2&lt;/sub&gt; (3.63 vs. 3.62 L/min) did not change. The 1,500-m race record in track and field events decreased significantly from a pre-training value of 5 minutes 03 seconds to a post-training value of 4 minutes 52 seconds. CONCLUSIONS: The results of this study indicate that utilizing laboratory indicators including vOBLA, vVO&lt;sub&gt;2&lt;/sub&gt;max, and tVO&lt;sub&gt;2&lt;/sub&gt;max may be extremely valuable when prescribing training programs for middle-distance runners.

Defining Conjunto Quantitatively: Classical and Modernist Styles in a Texas-Mexican Genre

Defining <i>Conjunto</i> Quantitatively: Classical and Modernist Styles in a Texas-Mexican Genre

Between Subalternity and Imperialism: Black Military Workers in U.S. History

Khary Oronde Polk demonstrates how popular and pseudoscientific ideas about race and gender have governed and shaped the biopolitics and necropolitics of U.S. militarism in his study of “black military workers” serving abroad from 1898 to 1948. Using African American studies, gender and sexuality studies, and military history approaches—as well as a range of printed primary and archival sources—Polk offers a theoretically sophisticated narrative, which challenges and builds off the ways in which historians have moved Blacks from the marginalia of U.S. military history to the center. From the enlistment of African American men as soldiers and the recruitment of Black women as “immune nurses” during the Spanish-Cuban-American War, to the deployment of Black soldiers and Black women nurses and auxiliary corps members during World War II, Polk’s narrative elucidates how “American military history is, among other things, a record of race and gender” (9). Contagions of Empire runs counter to histories that emphasize the heroism of African American men who served in the military overseas, but which fail to deconstruct critically the narrative of heterosexual Black men fighting for their “manhood rights.” Polk presents a more complex analysis of Black military service that problematizes histories of Black men and women participating in overseas war-making, imperialist expansion, and military occupation to “earn” enfranchisement, civil rights, and full citizenship in a white supremacist nation. He captures the racialized and gendered interstices through which Black men and women entered U.S. military history during the early period of modern global war.

Exploratory Examination of How Race and Criminal Record Relate to Housing Instability Among Domestic Violence Survivors.

Housing instability is a critical concern in the United States, and domestic violence (DV) survivors are a group at high risk for experiencing housing instability or of becoming unhoused. Prior research has also identified having a criminal record (CR) as being a major barrier to obtaining stable housing, and this is truer for Black and Latinx people compared to their White counterparts. No study has examined whether comparable trends exist among survivors of DV, a group also at elevated risk of having a CR, sometimes related to their experience of abuse. The current exploratory study included 305 unhoused or unstably housed female DV survivors who had sought out DV support services. Multivariate regressions explored if survivor race and CR were separately linked to greater housing instability. CR was then explored as a potential moderator in the relation between race and housing instability. Results revealed that DV survivors with a CR faced greater housing instability than those without a CR, Black and Latina survivors experienced greater housing stability than did White survivors, and CR did not moderate the relation between race and housing instability. The racial differences were unexpected and are discussed in light of methodological limitations. This is the first study to date to explore the role of CR possession on housing instability for DV survivors.

Race Records

Race Records

Standard and multiple-frequency tympanometric norms in Chinese young and older adults

ABSTRACT The normative data of standard and multiple-frequency tympanometry should be established depending on gender, age, race and specific recording parameters. However, the lack of normative data of standard and multiple-frequency tympanometry was documented in Chinese older adults. Previous studies which conducted the normative data from Southern Chinese young adults may not represent the Chinese young and older adults in Taiwan. The purpose of this study is to establish the norms of standard and multiple-frequency tympanometry in Chinese young and older adults. The effects of age and gender are investigated for understanding the characteristics of normative data of tympanometry. A total of 100 young adults and 100 older adults with normal middle ear status were recruited from the community in Taiwan. The data of peak Ytm, Vea and TW were obtained by a 226 Hz probe tone. Multiple-frequency tympanometry was recorded by 226, 678 and 1000 Hz probe tones and categorized by the Vanhuyse model. The resonance frequency was obtained by the method of sweep-pressure. The two-way independent ANOVA was used separately to examine the effects of age and gender on each of the tympanometric measures. The effect of gender was found in Ytm, Vea and TW, while the effect of age was only found in Vea. Older adults have more complex patterns of multiple-frequency tympanometry and have significantly lower resonance frequency than young adults do. Results suggest that the middle ear system status changes with aging. The norms, especially gender-specific norms, are needed for Chinese older adults for interpretation.

The sins of the child: Public opinion about parental responsibility for juvenile crime

Previous research indicates that people ascribe less responsibility to juvenile offenders than adult offenders for the crimes they have committed. Although assignment of responsibility to parents varies depending upon the youth’s age, we know little about the role of other factors. The current study used randomized factorial vignettes to examine whether the seriousness of the offense, peer involvement, and the offender's race, age, sex, and prior record influence support for parental responsibility. We found that participants in our study placed substantial responsibility on parents for dealing with juvenile offenders; however, support for punishing the parents was low, while the importance attached to enrolling parents in training was high. Views on parental responsibility were influenced by the age of the juvenile and the seriousness of the offense. The implications of these findings and how they fit in with previous work are discussed.

Motivation in the Athens Classic Marathon: The Role of Sex, Age, and Performance Level in Greek Recreational Marathon Runners.

The aim of the present study was to examine the motivation of recreational runners and its variation by sex, age, and performance level. Finishers (female: n = 32, age 40.1 ± 9.0 years old, height 162 ± 7 cm, body mass 57.7 ± 7.5 kg, race record 4:34 ± 0:39 h:min; male: n = 134, 44.2 ± 8.6 years, 176 ± 6 cm, 77.0 ± 9.3 kg, 4:02 ± 0:44 h:min) in the Athens Classic Marathon 2017 completed the Motivations of Marathoners Scales (MOMS) 56-item questionnaire. The highest scores in the MOMS were observed in the general health orientation and personal goal achievement categories, and the lowest in the recognition and competition areas. Female participants scored higher in coping, self-esteem, and goal achievement than their male counterparts (p < 0.05). The <30 age group scored higher than the 35–40 and 40–45 age groups in “competing with other runners” for male participants (p < 0.05). The average performance group outscored the slowest group in “achieving personal goals” and “competing with other runners” in female participants, whereas an effect of performance on these two themes was shown in male participants as well (p < 0.05). In summary, we partially confirmed that female and male marathon runners differ for their motivations. In addition, novel findings were the identification of age and performance level as correlates of motivations. The knowledge of these trends would be of great practical value for practitioners to optimize the motivation of their athletes.

Benefits of surgery in the multimodality treatment of stage IIB-IIIC small cell lung cancer.

Surgery combined with chemotherapy/radiotherapy is recommended for early stage small cell lung cancer (SCLC); however, the role of surgery in the multimodality treatment of advanced disease remains controversial. The clinical data of patients between 2000 and 2015 were obtained from the Surveillance, Epidemiology, and End Results database. The surgery group included 998 patients with stage IIB-IIIC. A matched non-surgery group (n = 2994) was generated by propensity score matching. The Kaplan-Meier method and log-rank tests were used for survival analyses. Univariate and multivariate analyses were used to identify significant prognostic factors. After matching, there were no significant differences between the two groups in race, age, sex, T classification, N classification, TNM stage, marital status, primary sites, and origin record NAACCR Hispanic Identification Algorithm (NHIA). The surgery group showed better overall survival and cancer-specific survival than the non-surgery group. Univariate and multivariate analyses showed that therapy methods, age, sex, T classification, and N classification were independent prognostic predictors for stage IIB-IIIC SCLC (all P < 0.05). Stratified analyses showed that survival outcomes favored surgery in any age groups, men and women, any T classification except T3, and N0-2 but not N3 compared with non-surgical treatment. The survival differences favored surgery in stage IIB and IIIA SCLC, although they were not significant in stage IIB and IIIC SCLC. Therefore, surgery was associated with improved survival in stage IIB and IIIA SCLC, but not in stage IIIB and IIIC SCLC.

Reduced training distance and a forage-only diet did not limit race participation in young Standardbred horses

In this study, a survey was used to document the type and amount of training to which 2- to 3-year old Swedish Standardbred horses are generally subjected. Moreover, an experimental study was conducted to examine the ability to achieve conventional performance goals in 16 Standardbred geldings fed a forage-only diet and allocated to either a control training programme (C-group) or a training programme with the high intensity training distance reduced by 30% (R-group) from March as 2-year-olds until December as 3-year-olds. The median distance of high intensity training per week reported by professional trainers was 6,700 m. In experimental horses, planned high intensity training/week was 6,315 and 4,288 m in C-group and R-group, respectively. There was no difference between experimental training groups in ability to race. The proportion of experimental horses that passed a preparation race as 2-year-olds (100%) and qualified for races (94%) was greater (P&lt;0.05) than for the rest of the cohort (77 and 63%), geldings of the same cohort (71 and 45%) and siblings of the experimental horses (84 and 69%). The proportion of horses that raced (56%) was equal to that of the cohort and of siblings (54%), but greater than the proportion of cohort geldings (35%, P&lt;0.05). In experimental horses, total earnings until 7 years of age were correlated to exercise haematocrit as 3-year-olds (r=0.51, P&gt;0.05) and number of races (r=0.55, P&gt;0.05). Race record was correlated to VLa4 as 3-year-olds (r=-0.75, P&lt;0.01). It was concluded that a forage-only diet and shorter distance of high intensity training than commonly used in Standardbred training in Sweden do not appear to restrict ability to qualify for races and race before 4 years of age.

A Concurrent Memory Race Recording Algorithm for Snoop-Based Coherence

A Concurrent Memory Race Recording Algorithm for Snoop-Based Coherence

Hyponatremia Is Associated With Increased Osteoporosis and Bone Fractures in a Large US Health System Population.

The significance of studies suggesting an increased risk of bone fragility fractures with hyponatremia through mechanisms of induced bone loss and increased falls has not been demonstrated in large patient populations with different types of hyponatremia. This matched case-control study evaluated the effect of hyponatremia on osteoporosis and fragility fractures in a patient population of more than 2.9 million. Osteoporosis (n = 30 517) and fragility fracture (n = 46 256) cases from the MedStar Health database were matched on age, sex, race, and patient record length with controls without osteoporosis (n = 30 517) and without fragility fractures (n = 46 256), respectively. Cases without matched controls or serum sodium (Na(+)) data or with Na(+) with a same-day blood glucose greater than 200 mg/dL were excluded. Incidence of diagnosis of osteoporosis and fragility fractures of the upper or lower extremity, pelvis, and vertebrae were the outcome measures. Multivariate conditional logistic regression models demonstrated that hyponatremia was associated with osteoporosis and/or fragility fractures, including chronic [osteoporosis: odds ratio (OR) 3.97, 95% confidence interval (CI) 3.59-4.39; fracture: OR 4.61, 95% CI 4.15-5.11], recent (osteoporosis: OR 3.06, 95% CI 2.81-3.33; fracture: OR 3.05, 95% CI 2.83-3.29), and combined chronic and recent hyponatremia (osteoporosis: OR 12.09, 95% CI 9.34-15.66; fracture: OR 11.21, 95% CI 8.81-14.26). Odds of osteoporosis or fragility fracture increased incrementally with categorical decrease in median serum Na(+). These analyses support the hypothesis that hyponatremia is a risk factor for osteoporosis and fracture. Additional studies are required to evaluate whether correction of hyponatremia will improve patient outcomes.

“An Authentic Record of My Race”: Exploring the Popular Narratives of African American Religion in the Music of Duke Ellington

AbstractEdward Kennedy “Duke” Ellington (1899–1974) emerged within the jazz profession as a prominent exponent of Harlem Renaissance racial uplift ideals about incorporating African American culture into artistic production. Formed in the early twentieth century's middle-class black Protestant culture but not a churchgoer in adulthood, Ellington conveyed a nostalgic appreciation of African American Christianity whenever hewrote music to chronicle African American history. This prominent jazz musician's religious nostalgia resulted in compositions that conveyed to a broader American audience a portrait of African American religiosity that was constantly “classical” and static—not quite primitive, but never appreciated as a modern aspect of black culture.This article examines several Ellington compositions from the late 1920s through the 1960s that exemplify his deployment of popular representations of African American religious belief and practice. Through the short filmBlack and Tanin the 1920s, the satirical popular song “Is That Religion?” in the 1930s, the long-form symphonic movementBlack, Brown and Beigein the 1940s, the lyricism of “Come Sunday” in the 1950s, and the dramatic prose of “My People” in the 1960s, Ellington attempted to capture a portrait of black religious practice without recognition of contemporaneous developments in black Protestant Christianity in the twentieth century's middle decades. Although existing Ellington scholarship has covered his “Sacred Concerts” in the 1960s and 1970s, this article engages themes and representations in Ellington's work prefiguring the religious jazz that became popular with white liberal Protestants in America and Europe. This discussion of religious narratives in Ellington's compositions affords an opportunity to reflect upon the (un)intended consequences of progressive, sympathetic cultural production, particularly on the part of prominent African American historical figures in their time. Moreover, this article attempts to locate the jazz profession as a critical site for the examination of racial and religious representation in African American religious history.

Arterial stiffness is inversely associated with a better running record in a full course marathon race.

[Purpose]Arterial stiffness is an independent predictor of cardiovascular risk and may contribute to reduced running capacity in humans. This study investigated the relationship between course record and arterial stiffness in marathoners who participated in the Seoul International Marathon in 2012.[Methods]A total of 30 amateur marathoners (Males n = 28, Females n = 2, mean age = 51.6 ± 8.3 years) were assessed before and after the marathon race. Brachial-ankle pulse wave velocity (ba-PWV) was assessed by VP-1000 plus (Omron Healthcare Co., Ltd., Kyoto, Japan) before and immediately after the marathon race. Pearson's correlation coefficient was used to determine the relationship between race record and ba-PWV. In addition, Wilcoxon signed rank test was used to determine the difference in ba-PWV between before and after the race.[Results]There was no significant change in the ba-PWV of marathoners before and after the race (1271.1 ± 185 vs. 1268.8 ± 200 cm/s, P=0.579). Both the full course record (Pearson's correlation coefficient = 0.416, P = 0.022) and the record of half line (Pearson's correlation coefficient = 0.482, P = 0.007) were positively related with the difference in ba-PWV, suggesting that reduced arterial stiffness is associated with a better running record in the marathon.[Conclusion]These results may suggest that good vascular function contributes to a better running record in the marathon race.

The Race Time Difference between Top Level and Semi Top Level Runners during the Full Marathon istance Running - In Terms of Correlative Relationship of Full Course and Every 5km Marathon Race Record is Considered -

The Race Time Difference between Top Level and Semi Top Level Runners during the Full Marathon istance Running - In Terms of Correlative Relationship of Full Course and Every 5km Marathon Race Record is Considered -

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