Countermovement Jump Height in National-Team Athletes of Various Sports: A Framework for Practitioners and Scientists

2020 ◽  
pp. 1-6 ◽  
Author(s):  
Thomas A. Haugen ◽  
Felix Breitschädel ◽  
Håvard Wiig ◽  
Stephen Seiler
Keyword(s):  
Cross Sectional Study ◽  
Training Center ◽  
Jump Height ◽  
Sectional Study ◽  
Countermovement Jump ◽  
Cross Sectional ◽  
National Team ◽  
Ski Jumping ◽  
Speed Skating ◽  
Long Jump

Purpose: To quantify possible differences in countermovement jump height across sport disciplines and sex in national-team athletes. Methods: In this cross-sectional study, 588 women (23 [5] y, 66 [8] kg) and 989 men (23 [5] y, 82 [12] kg) from 44 different sport disciplines (including 299 medalists from European Championships, World Championships, and/or Olympic Games) tested a countermovement jump on a force platform at the Norwegian Olympic Training Center between 1995 and 2018. Results: Athletic sprinting showed the highest values among the men (62.7 [4.8] cm) and women (48.4 [6.0] cm), clearly ahead of the long jump/triple jump (mean difference ± 90% CL: 6.5 ± 5.0 and 4.3  ± 4.1; very likely and likely; moderate) and speed skating sprint (11.4 ± 3.1 and 7.5 ± 5.5 cm; most likely and very likely; very large and moderate). These horizontally oriented sports displayed superior results compared with more vertically oriented and powerful sports such as beach volleyball, weightlifting, and ski jumping, both in men (from 2.9 ± 4.7 to 15.6 ± 2.9 cm; small to very large; possibly to most likely) and women (5.9 ± 4.8 to 13.4 ± 3.4 cm; large to very large; very likely to most likely), while endurance sports and precision sports were at the other end of the scale. Overall, the men jumped 33% higher than the women (10.3, ±0.6 cm; most likely; large). Conclusions: This study provides practitioners and scientists with useful information regarding the variation in countermovement jump height among national-team athletes within and across sport disciplines.

scholarly journals An Investigation of Knee Injury Profiles among Iranian Elite Karatekas: Observations from a Cross-Sectional Study

2021 ◽  
Vol 18 (13) ◽  
pp. 6888
Author(s):  
Hamidreza Naserpour ◽  
Julien S. Baker ◽  
Amir Letafatkar ◽  
Giacomo Rossettini ◽  
Frédéric Dutheil
Keyword(s):  
Knee Injury ◽  
Cruciate Ligament ◽  
Knee Injuries ◽  
Cross Sectional Study ◽  
Lower Extremity Injury ◽  
Sectional Study ◽  
Positive Health ◽  
Sports Activity ◽  
Cross Sectional ◽  
National Team

Karate training, despite the many positive health benefits, carries a risk of injury for participants. The current cross-sectional study aimed to investigate knee injury profiles among Iranian elite karatekas. Participants who attended the national team qualifiers, which included 390 male Kumite karatekas (age 24 ± 3 years old and weight 63 ± 12 kg), participated in this study. Information on knee injuries (injury history, type of injury mechanisms, and effects of knee symptoms on the ability to perform daily activities and recreational activities) were obtained using the Knee Outcome Survey (KOS). Using Pearson’s correlation coefficient, the study examined the relationships between different variables, including KOS subscales and levels of self-reported knee joint function. Our findings indicated that 287 karatekas (73.6%) experienced knee injuries. The anterior cruciate ligament (ACL) rupture (6.9%), articular cartilage (5.4%), and meniscus damage (3.8%) were the main typology of injury. In addition, there were no differences in knee injuries between the non-dominant and dominant legs. Most injuries occurred during the preparatory period (n = 162, 50%), especially during training periods. The KOS subscales scores (Mean ± Sd) for activities of daily living (ADL) and sports activity (SAS) were, respectively, 89 ± 11 and 91 ± 9. The self-reported scores for both the ADL and SAS subscales were, respectively, 89 ± 11 and 90 ± 10. Pearson coefficients of ADL and SAS subscales with their self-reported score were r = 0.761 (p < 0.0001) and r = 0.782 and (p < 0.0001), respectively. The profile of knee injuries in the current investigation is similar to previous surveys that reported lower extremity injury patterns. The findings of this study could be adopted to inform practice aimed at planning interventions for the reduction and prevention of knee injuries among karatekas.

scholarly journals The Influence of Recruitment Age and Anthropometric and Physical Characteristics on the Development Pathway of English Academy Football Players

2020 ◽  
pp. 1-9
Author(s):  
Mark R. Noon ◽  
Emma L.J. Eyre ◽  
Matthew Ellis ◽  
Tony D. Myers ◽  
Rhys O. Morris ◽  
...  
Keyword(s):  
Cross Sectional Study ◽  
Physical Characteristics ◽  
Bayesian Regression ◽  
Football Players ◽  
Jump Height ◽  
Countermovement Jump ◽  
Cross Sectional ◽  
Male Youth ◽  
Development Pathway ◽  
Key Indicator

Purpose: To investigate the influence of recruitment age on retention and release across the development pathway and to explore the influence of anthropometric and physical characteristics on retention and release at different ages throughout the development pathway and the likelihood of obtaining a professional contract. Methods: Following receipt of ethics approval, a cross-sectional study tracking 4 cohorts of players over 5 years assessed 76 male youth football players (11–16 y) from an English football academy on 3 occasions annually in anthropometry, countermovement jump height, and linear (30 and 15 m) and multidirectional sprint time. Players were categorized based on their start and release date. Results: Starting early (ie, before U12) in an academy was a key indicator of obtaining a professional contract, representing 87% of the players signed. Bayesian regression models suggest that the majority of differences in physical characteristics between players that were released and retained are trivial, small, and/or uncertain. Players who attained a professional contract at 18 had slower 15- and 30-m sprint times at U13 to U15 (P > 0 = .87–.99), slower multidirectional sprint times at U14 (P > 0 = .99), and lower countermovement jump height at U13 to U16 (P > 0 = .88–.99) compared with players who did not gain a contract. Conclusion: Players recruited early have an increased likelihood of gaining a professional contract. Physical assessments lack utility when used in isolation as a talent-identification tool.

scholarly journals Relationship between Running Spatiotemporal Kinematics and Muscle Performance in Well-Trained Youth Female Athletes. A Cross-Sectional Study

2021 ◽  
Vol 18 (16) ◽  
pp. 8869
Author(s):  
Alejandro Castillo-Domínguez ◽  
Jerónimo García-Romero ◽  
Joaquín Páez-Moguer ◽  
Tomás Ponce-García ◽  
Miguel Medina-Alcántara ◽  
...  
Keyword(s):  
Step Length ◽  
Cross Sectional Study ◽  
Sectional Study ◽  
Strength Index ◽  
Countermovement Jump ◽  
Step Frequency ◽  
Cross Sectional ◽  
Performance Variables ◽  
Neuromuscular Performance ◽  
Spatiotemporal Parameters

The purpose of this cross-sectional study was to analyse the relationship of neuromuscular performance and spatiotemporal parameters in 18 adolescent distance athletes (age, 15.5 ± 1.1 years). Using the OptoGait system, the power, rhythm, reactive strength index, jump flying time, and jump height of the squat jump, countermovement jump, and eight maximal hoppings test (HT8max) and the contact time (CT), flying time (FT), step frequency, stride angle, and step length of running at different speeds were measured. Maturity offset was determined based on anthropometric variables. Analysis of variance (ANOVA) of repeated measurements showed a reduction in CT (p < 0.000) and an increase in step frequency, step length, and stride angle (p < 0.001), as the velocity increased. The HT8max test showed significant correlations with very large effect sizes between neuromuscular performance variables (reactive strength index, power, jump flying time, jump height, and rhythm) and both step frequency and step length. Multiple linear regression found this relationship after adjusting spatiotemporal parameters with neuromuscular performance variables. Some variables of neuromuscular performance, mainly in reactive tests, were the predictors of spatiotemporal parameters (CT, FT, stride angle, and VO). Rhythm and jump flying time in the HT8max test and power in the countermovement jump test are parameters that can predict variables associated with running biomechanics, such as VO, CT, FT, and stride angle.

scholarly journals Injury characteristics of Indonesian para-athletes prior to Tokyo Olympics 2020: a cross-sectional study

2021 ◽  
Vol 11 (4) ◽  
pp. 679-690
Author(s):  
Yulingga Nanda Hanief ◽  
Prisca Widiawati ◽  
Supriatna Supriatna ◽  
Ahmad Abdullah ◽  
Sri Sumartiningsih
Keyword(s):  
Cross Sectional Study ◽  
The Body ◽  
Sectional Study ◽  
Cross Sectional ◽  
Professional Literature ◽  
National Team ◽  
Injury Management ◽  
Injury Characteristics ◽  
Study Results ◽  
The Subject

BACKGROUND: Sports for people with disabilities and injuries have been the subject of discourse in the professional literature in the fields of traumatology and sports medicine. OBJECTIVE: This research aims to elucidate the injury characteristics of athletes in the Indonesian national team. The subject of this study were nine athletes (male=5, female=4) with males around the age of 28±9.13 and females 28±5.66 years. METHOD: The method approach is descriptive with a cross-sectional study technique using a questionnaire about injury history, types of injury, injury factors, and injury management for Indonesian Para Athletics Athletes who have competed in the 2020 Tokyo Olympics. Data analysis is depicted in numbers and percentages and Fisher's exact test to determine the relationship between variables. RESULTS: The study results reported that Indonesian athletes suffered injuries of the lower limbs (70%), part of the body that is frequently injured was the thigh (28%) and the type of injury that was often experienced sprain/twist. CONCLUSION: The injury characteristics in the sprint (track) category form a pattern of injuries to the thigh, Achilles tendon, ankle, and knee. There appears to be no correlation between gender, training frequency, injury share, match number, and warm-up type. The implication is that injury management is necessary before and during competition by considering biomechanics, pathophysiology, and psychosocial problems. Injury prevention strategies by coaches and medical teams should lead to more significant injury reduction and optimize athletes' health, safety, and well-being.

Correlates of shoulder pain in wheelchair basketball players from the Japanese national team: A cross-sectional study

2016 ◽  
Vol 29 (4) ◽  
pp. 795-800 ◽  
Author(s):  
Kenji Tsunoda ◽  
Hirotaka Mutsuzaki ◽  
Kazushi Hotta ◽  
Kaori Tachibana ◽  
Yukiyo Shimizu ◽  
...  
Keyword(s):  
Shoulder Pain ◽  
Cross Sectional Study ◽  
Sectional Study ◽  
Wheelchair Basketball ◽  
Basketball Players ◽  
Cross Sectional ◽  
National Team

scholarly journals Assessment of antenatal care of third trimester pregnant women attending in antenatal clinic at Mohammadpur Fertility Services & Training Centre of Dhaka, Bangladesh

2021 ◽  
Vol 7 (1) ◽  
pp. 24-28
Author(s):  
Hossain B ◽  
Akhter F ◽  
AC Apou ◽  
Rubaya Ahmed ◽  
N Uddin
Keyword(s):  
Pregnant Women ◽  
Family Income ◽  
Control Method ◽  
Cross Sectional Study ◽  
Training Center ◽  
Sectional Study ◽  
Cross Sectional ◽  
Training Centre ◽  
Physical Test ◽  
And Training

In Bangladesh 37% of pregnant women are taking four step of ANC treatment. The main purpose of this study was to identify the factor associated with ANC checkup. A hospital based cross sectional study at Mohammadpur Fertility Services and Training Center (MFSTC), Mohammadpur, Dhaka, Bangladesh. This cross sectional study was conveyed 100 pregnant women who visited the Mohammadpur Fertility Services and Training Center for taking antenatal checkup. Total 100 pregnant women’s data was collected in which 12%, 2nd trimester and 88% , 3rd trimester of pregnancy. According to the amount 3rd trimester of pregnant women came this hospital for antenatal checkup. Demographic data and information on age height, weight, religion, educational qualification, birth control method, health problem, blood donor, physical test, tetanus vaccine, family income level, and economical effect were collected from the patient by using a questionnaire. A good number of the pregnant women normally eaten balanced food. Some of the patients maintain the proper antenatal instruction and take more seasonal fruits and vegetable, egg, milk, fish to satisfy their nutrients for maternal health care period

Does a Graduate Course in Fluency Disorders Make a Difference?

2010 ◽  
Vol 20 (1) ◽  
pp. 10-14 ◽  
Author(s):  
Evelyn R. Klein ◽  
Barbara J. Amster
Keyword(s):  
Undergraduate Students ◽  
Graduate Programs ◽  
The United States ◽  
Cross Sectional Study ◽  
Sectional Study ◽  
Graduate Course ◽  
Cross Sectional ◽  
Fluency Disorders ◽  
Introductory Course ◽  
Communicative Disorders

Abstract A study by Yaruss and Quesal (2002), based on responses from 134 of 239 ASHA accredited graduate programs, indicated that approximately 25% of graduate programs in the United States allow students to earn their degree without having coursework in fluency disorders and 66% of programs allow students to graduate without clinical experience treating people who stutter (PWS). It is not surprising that many clinicians report discomfort in treating PWS. This cross-sectional study compares differences in beliefs about the cause of stuttering between freshman undergraduate students enrolled in an introductory course in communicative disorders and graduate students enrolled and in the final weeks of a graduate course in fluency disorders.

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