scholarly journals Comparison of Distance and Angular Analysis for Measurement of Hamstring Flexibility in Preschoolers

Children ◽  
2022 ◽  
Vol 9 (1) ◽  
pp. 39
Author(s):  
Anke Hua ◽  
Jingyuan Bai ◽  
Yong Fan ◽  
Jian Wang
Keyword(s):  
Length Bias ◽  
Sitting Height ◽  
Typical Error ◽  
Angular Analysis ◽  
Distance Score ◽  
Starting Point ◽  
Anthropometric Characteristics ◽  
Hamstring Flexibility ◽  
Hip Flexion ◽  
Absolute Reliability

The study aimed to (1) investigate the reliability and usefulness of a proposed angular analysis during a modified sit-and-reach (MSR) test, and (2) compare the proposed MSR angular analysis and the commonly used MSR distance to verify the influence of the anthropometric characteristics in preschoolers. 194 preschoolers participated in the study. Before testing, the anthropometric characteristics were collected. Each participant performed the MSR test twice. The MSR distance score was obtained from the starting point to the reaching point, while the MSR angle score was calculated according to the approximate hip flexion angle. Both the relative and absolute reliability were good for the angular analysis during an MSR test in preschoolers (ICC ranging from 0.82 to 0.91, CV% ranging from 8.21 to 9.40). The angular analysis demonstrated good usefulness, with a lower typical error than the smallest worthwhile change in 3- and 5-year-old groups. The MSR angle scores could eliminate the concern of the influence of anthropometric characteristics, while MSR distance and anthropometric characteristics (i.e., sitting height and arm length) were found to be weakly correlated. In conclusion, the angular analysis when performing the MSR test is reliable and appears to eliminate the concern regarding the limb length bias.

Reproducibility of velocity-dependent power: before and after lengthening contractions

2011 ◽  
Vol 36 (5) ◽  
pp. 626-633 ◽  
Author(s):  
Geoffrey A. Power ◽  
Brian H. Dalton ◽  
Charles L. Rice ◽  
Anthony A. Vandervoort
Keyword(s):  
Peak Power ◽  
High Reliability ◽  
Similar Amount ◽  
Shortening Velocity ◽  
Lengthening Contractions ◽  
Isokinetic Testing ◽  
Typical Error ◽  
Before And After ◽  
Absolute Reliability ◽  
Ankle Dorsiflexors

The determination of power using isokinetic testing has been shown to be highly reliable. However, isotonic and isokinetic testing involve specific mechanical constraints that likely necessitate different neuromuscular strategies. Therefore, the purpose here was to establish test–retest intrarater reliability (separated by 7 days) of loaded maximal shortening velocity and velocity-dependent power of the ankle dorsiflexors using the isotonic mode of the Biodex dynamometer (i) at baseline and (ii) throughout recovery following 150 high-intensity lengthening contractions. Intraclass correlation coefficients (ICC)2,1 with 95% CIs were used to determine relative reliability, whereas absolute reliability included typical error (TEM) and typical error expressed as a coefficient of variation (TEMCV). Twenty-four young men and women volunteered for the study. Maximal shortening velocity and power were determined with a fixed resistance set at 20% of maximal voluntary isometric contraction across 2 testing sessions separated by 7 days. ICCs were 0.93 and 0.98 for maximal shortening velocity and peak power, respectively. Following the lengthening contractions, ICCs indicated high reliability for maximal shortening velocity and peak power, 0.86 and 0.94, respectively, suggesting that a similar amount of fatigue was incurred on both days. Measures of absolute reliability for maximal shortening velocity and peak power also yielded high reliability. The isotonic mode is highly reliable when testing velocity-dependent power of the ankle dorsiflexors at baseline and following fatiguing lengthening contractions. The high reliability of this measure is encouraging and suggests that the isotonic mode can be used in various settings to track group changes before and after training and following fatigue and lengthening contractions.

scholarly journals Return to play after hamstring injuries in football (soccer): a worldwide Delphi procedure regarding definition, medical criteria and decision-making

2017 ◽  
Vol 51 (22) ◽  
pp. 1583-1591 ◽  
Author(s):  
Nick van der Horst ◽  
FJG Backx ◽  
Edwin A Goedhart ◽  
Bionka MA Huisstede
Keyword(s):  
Decision Making ◽  
Field Testing ◽  
Return To Play ◽  
Hamstring Injury ◽  
Feedback Report ◽  
Hamstring Injuries ◽  
Starting Point ◽  
Delphi Procedure ◽  
Hamstring Flexibility ◽  
The Moment

There are three major questions about return to play (RTP) after hamstring injuries: How should RTP be defined? Which medical criteria should support the RTP decision? And who should make the RTP decision? The study aimed to provide a clear RTP definition and medical criteria for RTP and to clarify RTP consultation and responsibilities after hamstring injury. The study used the Delphi procedure. The results of a systematic review were used as a starting point for the Delphi procedure. Fifty-eight experts in the field of hamstring injury management selected by 28 FIFA Medical Centres of Excellence worldwide participated. Each Delphi round consisted of a questionnaire, an analysis and an anonymised feedback report. After four Delphi rounds, with more than 83% response for each round, consensus was achieved that RTP should be defined as ‘the moment a player has received criteria-based medical clearance and is mentally ready for full availability for match selection and/or full training’. The experts reached consensus on the following criteria to support the RTP decision: medical staff clearance, absence of pain on palpation, absence of pain during strength and flexibility testing, absence of pain during/after functional testing, similar hamstring flexibility, performance on field testing, and psychological readiness. It was also agreed that RTP decisions should be based on shared decision-making, primarily via consultation with the athlete, sports physician, physiotherapist, fitness trainer and team coach. The consensus regarding aspects of RTP should provide clarity and facilitate the assessment of when RTP is appropriate after hamstring injury, so as to avoid or reduce the risk of injury recurrence because of a premature RTP.

scholarly journals Static Anthropometric Characteristics of Bangladeshi Vehicle Driver: A Case Study

Scientifica ◽  
2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
P. K. Halder ◽  
E. Sarker
Keyword(s):  
Musculoskeletal Injuries ◽  
The Body ◽  
Anthropometric Data ◽  
Body Dimensions ◽  
Sitting Posture ◽  
Sitting Height ◽  
Anthropometric Characteristics ◽  
The Mean ◽  
Working Efficiency

Background. Inappropriate design of sitting furniture and working equipment causes the serious musculoskeletal injuries and various pains as well as reducing working efficiency. Uncomfortable sitting posture in prolonged driving in Bangladesh is an issue to be solved immediately. Therefore, anthropometric databank of user population is significantly essential for the suitable dimensional design for avoiding these remarkable problems.Methods. This study analyses the anthropometric data of the Bangladeshi male vehicle driver aged between 30 and 60 years. A total of 210 Bangladeshi healthy drivers are considered for 15 anthropometric measurements and compared with the similar anthropometrics of other nationalities.Results.The mean stature and sitting height erect of Bangladeshi driver are 1645 mm and 843 mm, respectively. The mean of body mass index (BMI) of the drivers is 26.09 kg/m2, which indicates that the drivers are overweight. The mean stature of Bangladeshi driver is 17 mm shorter than the driver of Korea and 115 mm shorter than the driver of Iran.Conclusion. There are substantial differences between the body dimensions of Bangladeshi driver and similar dimensions of other countries. In comparison, Bangladeshi driver is found to be the shortest compared with the sample of other nationalities.

scholarly journals Anthropometric Profile in Different Event Categories of Acrobatic Gymnastics

2017 ◽  
Vol 57 (1) ◽  
pp. 169-179 ◽  
Author(s):  
Yaiza Taboada-Iglesias ◽  
Mercedes Vernetta Santana ◽  
Águeda Gutiérrez-Sánchez
Keyword(s):  
Body Mass Index ◽  
Regression Analysis ◽  
Body Height ◽  
Abdominal Circumference ◽  
Female Group ◽  
Sitting Height ◽  
Event Category ◽  
Anthropometric Characteristics ◽  
Female Pair ◽  
Anthropometric Profile

AbstractThere is a specific anthropometric profile for each sport, which may be differentiated even in relation to the position, role or event category within each sport discipline. However, there are few studies on acrobatic gymnastics, and the goal of this work was to determine the anthropometric profile depending on the event category, as well as factors that predisposed to performance in these categories. The sample consisted of 150 gymnasts from Spain, divided into 8 groups according to the event category and the role played. The kinanthropometric measurements were taken through the procedures established by the International Society for the Advancement of Kineantropometry. The anthropometric characteristics, including body mass index, somatotype, body composition and proportionality using the Phantom stratagem were analyzed, and the results obtained from the different groups were compared. A regression analysis was performed with particular groups of gymnasts. No significant differences (p < 0.05) were observed between groups of female tops or male bases, although differences were found between female group bases and female pair bases. It could be suggested that higher values of body height, sitting height, the minimum abdominal circumference, percentage of fat and low biliocristal breadth predispose female bases to work in pairs rather than in groups. The conclusion is that the anthropometric measurements are not decisive when guiding a gymnast toward choosing one event category or another, except for female bases.

Acute Effects and Perceptions of Deep Oscillation Therapy for Improving Hamstring Flexibility

2018 ◽  
Vol 27 (6) ◽  
pp. 570-576
Author(s):  
Zachary K. Winkelmann ◽  
Ethan J. Roberts ◽  
Kenneth E. Games
Keyword(s):  
Pearson Correlation ◽  
Change Score ◽  
Global Rating ◽  
Physically Active ◽  
Outcome Score ◽  
Patient Reported ◽  
Sport Activities ◽  
Hamstring Flexibility ◽  
Hip Flexion ◽  
Straight Leg Raise

Context:Hamstring inflexibility is typically treated using therapeutic massage, stretching, and soft tissue mobilization. An alternative intervention is deep oscillation therapy (DOT). Currently, there is a lack of evidence to support DOT’s effectiveness to improve flexibility.Objective:To explore the effectiveness of DOT to improve hamstring flexibility.Design:Randomized single-cohort design.Setting:Research laboratory.Participants:Twenty-nine healthy, physically active individuals (self-reported activity of a minimum 200 min/wk).Interventions:All participants received a single session of DOT with randomization of the participant’s leg for the intervention. The DOT intervention parameters included a 1∶1 mode and 70% to 80% dosage at various frequencies for 28 minutes. Hamstring flexibility was assessed using passive straight leg raise for hip flexion using a digital inclinometer. Patient-reported outcomes were evaluated using the Copenhagen Hip and Groin Outcome Score and the Global Rating of Change (GRoC).Main Outcome Measure:The independent variable was time (pre and post). The dependent variables included passive straight leg raise, the GRoC, and the participant’s perceptions of the intervention. Statistical analyses included a dependentttest and a Pearson correlation.Results:Participants reported no issues with sport, activities of daily living, or quality of life prior to beginning the intervention study on the Copenhagen Hip and Groin Outcome Score. Passive straight leg raise significantly improved post-DOT (95% confidence interval, 4.48°–7.85°,P < .001) with a mean difference of 6.17 ± 4.42° (pre-DOT = 75.43 ± 21.82° and post-DOT = 81.60 ± 23.17°). A significant moderate positive correlation was identified (r = .439,P = .02) among all participants between the GRoC and the mean change score of hamstring flexibility. Participants believed that the intervention improved their hamstring flexibility (5.41 ± 1.02 points) and was relaxing (6.21 ± 0.86).Conclusions:DOT is an effective intervention to increase hamstring flexibility.

Absolute reliability of five clinical tests for assessing hamstring flexibility in professional futsal players

2012 ◽  
Vol 15 (2) ◽  
pp. 142-147 ◽  
Author(s):  
Francisco Ayala ◽  
Pilar Sainz de Baranda ◽  
Mark De Ste Croix ◽  
Fernando Santonja
Keyword(s):  
Clinical Tests ◽  
Hamstring Flexibility ◽  
Absolute Reliability

scholarly journals Performance Factors in Dinghy Sailing: Laser Class

2019 ◽  
Vol 16 (24) ◽  
pp. 4920 ◽  
Author(s):  
Israel Caraballo ◽  
José Luis González-Montesinos ◽  
Antonio Alías
Keyword(s):  
Morphological Characteristics ◽  
Body Fat Percentage ◽  
Fat Percentage ◽  
Performance Factors ◽  
Sitting Height ◽  
Foot Length ◽  
Abdominal Perimeter ◽  
Anthropometric Characteristics ◽  
Navigation Experience ◽  
The Relationship

Despite the relationship between performance and anthropometric characteristics, strength, and endurance in the action of dinghy hiking, there is no equation to predict the position obtained in competition. The purpose of this study was to examine the effects of anthropometric characteristics, strength, and endurance on the performance of the sailor. Twenty-nine male sailors of the Laser class were evaluated according to age, navigation experience, strength and resistance tests in a simulator, body weight, size, sitting height, Body Mass Index (BMI), body fat percentage, trochanteric length, thigh length, tibial length, foot length, abdominal perimeter, and upper thigh perimeter. The results show that the variables were related to performance are age, navigation experience, height, and length of the thigh. The variables that are most related to performance are age and sailing experience. Seventy-six percent of the performance can be estimated using the following equation: 311.971 + (−1.089 × height) + (−1946 × age) + (−1.537 × thigh length). Performance in the Laser class will be determined by the tactics (age and sailing experience) and the morphological characteristics of the sailor (height and sitting height).

scholarly journals Acute Lower Extremity Running Kinematics After a Hamstring Stretch

2012 ◽  
Vol 47 (1) ◽  
pp. 5-14 ◽  
Author(s):  
Autumn L. Davis Hammonds ◽  
Kevin G. Laudner ◽  
Steve McCaw ◽  
Todd A. McLoda
Keyword(s):  
Pelvic Tilt ◽  
Knee Extension ◽  
Swing Phase ◽  
Treadmill Running ◽  
Control Group ◽  
Single Session ◽  
Anterior Pelvic Tilt ◽  
Hamstring Flexibility ◽  
Hip Flexion ◽  
Straight Leg Raise

Context: Limited passive hamstring flexibility might affect kinematics, performance, and injury risk during running. Pre-activity static straight-leg raise stretching often is used to gain passive hamstring flexibility. Objective: To investigate the acute effects of a single session of passive hamstring stretching on pelvic, hip, and knee kinematics during the swing phase of running. Design: Randomized controlled clinical trial. Setting: Biomechanics research laboratory. Patients or Other Participants: Thirty-four male (age = 21.2 ± 1.4 years) and female (age = 21.3±2.0 years) recreational athletes. Intervention(s): Participants performed treadmill running pretests and posttests at 70% of their age-predicted maximum heart rate. Pelvis, hip, and knee joint angles during the swing phase of 5 consecutive gait cycles were collected using a motion analysis system. Right and left hamstrings of the intervention group participants were passively stretched 3 times for 30 seconds in random order immediately after the pretest. Control group participants performed no stretching or movement between running sessions. Main Outcome Measure(s): Six 2-way analyses of variance to determine joint angle differences between groups at maximum hip flexion and maximum knee extension with an α level of .008. Results: Flexibility increased between pretest and post-test in all participants (F1,30 = 80.61, P&lt;.001). Anterior pelvic tilt (F1,30 = 0.73, P=.40), hip flexion (F1,30 = 2.44, P=.13), and knee extension (F1,30 = 0.06, P=.80) at maximum hip flexion were similar between groups throughout testing. Anterior pelvic tilt (F1,30 = 0.69, P=.41), hip flexion (F1,30 = 0.23, P=.64), and knee extension (F1,30 = 3.38, P=.62) at maximum knee extension were similar between groups throughout testing. Men demonstrated greater anterior pelvic tilt than women at maximum knee extension (F1,30 = 13.62, P=.001). Conclusions: A single session of 3 straight-leg raise hamstring stretches did not change pelvis, hip, or knee running kinematics.

scholarly journals Differences between the Anthropometric Measurements of Serbian and Libyan Male Passenger Car Drivers

2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
Zorica Veljković ◽  
Aleksandar Brkić ◽  
Vesna Spasojevic Brkić ◽  
Milivoj Klarin ◽  
Ahmed Essdai ◽  
...  
Keyword(s):  
Anthropometric Measurements ◽  
Leg Length ◽  
Anthropometric Data ◽  
Interior Space ◽  
Passenger Car ◽  
Mean Values ◽  
Sitting Height ◽  
Foot Length ◽  
Anthropometric Characteristics ◽  
First Time

The collection and analysis of anthropometric characteristics for various passenger car user populations is a very important predecessor of the design process. The first aim of this survey is to collect up-to-date anthropometric data for male passenger car drivers in Serbia and to collect those data for the first time in Libya. The second aim of this survey is to compare the collected data and enable further modeling using both univariate and multivariate operators’ models from both samples. Anthropometric measurements on standing height, sitting height, lower leg length, upper leg length, shoulder width, hip breadth, arm length, and foot length were collected for 921 Serbian and 300 Libyan male drivers. Results show that, for Serbian male drivers, a correlation between variables exists in 67.85% cases, while for Libyan male drivers, a correlation between variables exists in 39.28% cases. The comparison of mean values between variables for Serbian and Libyan male drivers showed that, beside shoulder width, all others have significantly higher values for Serbians than for Libyikans. Consequently, there are different interior space dimensions of the vehicle obtained: for Serbian drivers, interior space dimensions amounted to 1500 × 561 × 1230 mm and for Libyan drivers amounted to1400 × 591 × 1155 mm which are useful to passenger car designers in eliminating existing anthropometric inconsistencies.

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