Prediction of Jumping Distance Using Run-Up Velocity and Age for Female Long Jumpers

2021 ◽  
Vol 15 (8) ◽  
pp. 2324-2328
Author(s):  
Işik Bayraktar ◽  
Murat Çilli ◽  
Tuncay Örs
Keyword(s):  
Distance Estimation ◽  
Flight Distance ◽  
Estimation Model ◽  
Jump Distance ◽  
Velocity Jump ◽  
Long Jump ◽  
Run Up ◽  
Jump Velocity ◽  
Biomechanical Factors ◽  
Age Prediction

It is the flight distance which is approximately ninety percent of jump distance in long jump. On the other hand, there are many biomechanical factors that determine the flight distance and horizontal velocity is considered to be the most effective factor. The aim of this study was to create a jump distance estimation model based on run-up velocity that can practically be used by trainers. The research data was included 858 valid trials of 156 female Turkish long jumpers (ages: 17.8±3.4 years). According to the correlation results of the current study; a nonlinear regression model was used between the variables found to have the highest correlation (age, last 10 meter run-up velocity, jump distance). According to this model, 79.10% of the jump distance can be estimated with the variables of age and run-up velocity in the last ten meters. Developed to be used for female long jumpers at a broad performance level, this model may make it possible to make technical evaluations about whether the velocity, technique and strength of a female long jumper are stable. Keywords: long jump, velocity, age, prediction model

Long Jump Motion Analysis Based on the Aerodynamics

2013 ◽  
Vol 791-793 ◽  
pp. 1441-1444
Author(s):  
Peng Fei Shi
Keyword(s):  
Incident Angle ◽  
Jump Process ◽  
Track And Field ◽  
Friction Resistance ◽  
Physical Conditions ◽  
Jump Distance ◽  
Air Resistance ◽  
Long Jump ◽  
Pressure Resistance ◽  
Run Up

The long jump motion is a traditional track and field event. This sport is not only relevant with athletes congenital physical conditions, but also with the action skills in the long jump process. In the process of long jump, from the run-up to the take-off and landing, relatively large air resistance will be suffered, and the air resistance is affected by the size of the take-off speed and jumping height. Based on this, this article has carried on the detailed analysis of the air dynamic theory in the process of athletes long jump. It also has established the mathematical model of the friction resistance and air pressure resistance in the long jump process, and it has obtained the maximum incident angle when the maximum jump distance was happened by the take-off angle. Finally, through the experiment method, it has established the jumping speed loss curve and loss table under the air resistance effect, and obtained the incident angle and take-off speed in the long jump process, which provides the theory basis for the research of long jump motion.

Phase-Specific Force and Time Predictors of Standing Long Jump Distance

2021 ◽  
pp. 1-8
Author(s):  
John R. Harry ◽  
John Krzyszkowski ◽  
Luke D. Chowning ◽  
Kristof Kipp
Keyword(s):  
National Collegiate Athletic Association ◽  
Reaction Force ◽  
Vertical Force ◽  
Jump Height ◽  
Strength Index ◽  
Phase Duration ◽  
Standing Long Jump ◽  
Jump Distance ◽  
Long Jump ◽  
Force Time

This study sought to identify potential predictors of standing long jump (SLJ) performance using force–time strategy metrics within the unloading, eccentric yielding, eccentric braking, and concentric phases. Fifteen National Collegiate Athletic Association division 1 male soccer players (19 [1] y, 1.81 [0.94] m, 80.3 [22.4] kg) performed 3 maximum-effort SLJs, while 3-dimensional ground reaction force (GRF) data were obtained. Regularized regression models were used to investigate associations between force–time strategy metrics and 2 metrics of SLJ performance (ie, jump distance and modified reactive strength index). Jump height and eccentric yielding time were the only predictors of jump distance that also demonstrated large correlations to jump distance. Anterior–posterior unloading yank, average concentric vertical force, and concentric phase duration were the only predictors of modified reactive strength index that also demonstrated large correlations to modified reactive strength index. To maximize SLJ distance in high-level soccer athletes, human performance practitioners could design interventions to drive changes in strategy to increase jump height and decrease eccentric yielding time. To improve SLJ explosiveness, interventions to drive changes in unloading and concentric force application and decrease concentric time could be emphasized. Importantly, unique variable combinations can be targeted when training for SLJ distance and explosiveness adaptations.

Inter-vehicle distance estimation considering camera attitude angles based on monocular vision

2020 ◽  
pp. 095440702094139
Author(s):  
Jun Liu ◽  
Rui Zhang ◽  
Shihao Hou
Keyword(s):  
Distance Estimation ◽  
Estimation Methods ◽  
Vanishing Point ◽  
Estimation Model ◽  
The Road ◽  
Attitude Angle ◽  
Driving Assistance ◽  
Lane Line ◽  
Texture Orientation ◽  
On The Road

Perceiving the distance between vehicles is a crucial issue for advanced driving assistance systems. However, most vision-based distance estimation methods do not consider the influence of the change in camera attitude angles during driving or only use the vanishing point detected by lane lines to correct the pitch angle. This paper proposed an improved pinhole distance estimation model based on the road vanishing point without the lane line information. First, the road vanishing point is detected based on the dominant texture orientation, and the yaw and pitch angles of the camera are estimated. Then, a distance estimation model considering attitude angle compensation is established. Finally, the experimental results show that the proposed method can effectively correct the influence of the camera attitude angle on the distance estimation results.

A Kinematic Profile of the Approach Run of Novice Long Jumpers

1995 ◽  
Vol 11 (2) ◽  
pp. 142-162 ◽  
Author(s):  
William P. Berg ◽  
Nancy L. Greer
Keyword(s):  
Important Determinant ◽  
Jump Performance ◽  
Similar Role ◽  
Jump Distance ◽  
Effective Training ◽  
Long Jump

This study determined the kinematics of the final 11 steps of the long jump approach (LJA) for 19 novice long jumpers. Associations between takeoff accuracy and jump performance were identified, and comparisons of LJA kinematics were made with previous investigations of horizontal jumps performed by expert long jumpers. Results indicated that absolute takeoff error was not an important determinant of jump distance for the novice long jumpers. Additionally, novice jumpers differed from expert jumpers in terms of the relationships among specific variables. The results suggest that kinematic variables that appear to be causally related to jump performance in experts may not piay a similar role in the performance of novices. Hypotheses for these differences were offered. Differences between the LJAs of novice and expert long jumpers warrant further investigation, so that their origins can be determined and used to develop effective training regimes.

Effect of take-off from prosthetic versus intact limb on transtibial amputee long jump technique

2012 ◽  
Vol 36 (3) ◽  
pp. 297-305 ◽  
Author(s):  
L Nolan ◽  
Benjamin L Patritti ◽  
Kathy J Simpson
Keyword(s):  
Vertical Velocity ◽  
Sagittal Plane ◽  
Similar Amount ◽  
Prosthetic Limb ◽  
Approach Speed ◽  
Jump Distance ◽  
Long Jump ◽  
Correct Technique ◽  
Nonparametric Comparison ◽  
Intact Limb

Background: Increasing numbers of long jumpers with lower limb amputations choose to take off from their prosthetic limb. It is not yet known what difference in technique, if any, this requires, or which is more advantageous. Objectives: To investigate kinematic differences in long jump technique in athletes with a unilateral transtibial ampution (TT) who take off from their prosthetic limb versus those who take off from their intact limb. Study Design: Naturalistic, field-based, observational; independent group, nonparametric comparison. Methods: Two-dimensional sagittal plane kinematic analysis was performed on all athletes competing in the men’s Paralympic TT long jump finals. Five athletes took off from their prosthetic limb (TOprosth) and five from their intact limb (TOintact). Results: No differences were seen between the two groups in terms of jump distance, approach speed or vertical velocity at touch down. While in contact with the take-off board, the two groups gained a similar amount of vertical velocity. However, the TOprosth group appeared to conserve horizontal velocity by using the prosthesis as a ‘springboard’, minimizing the large hip and knee range of motion displayed by the TOintact group and athletes in previous studies. Conclusions: While differences in technique were observed, no difference was found for jump distance. Clinical relevance Athletes choosing to take-off from their prosthetic limb in long jump require a different technique to those who choose to take-off from their intact limb. Knowledge of the correct technique can help reduce excessive training which can lead to injury, particularly in the residual limb.

Is Increased Residual Shank Length a Competitive Advantage for Elite Transtibial Amputee Long Jumpers?

2011 ◽  
Vol 28 (3) ◽  
pp. 267-276 ◽  
Author(s):  
Lee Nolan ◽  
Benjamin L. Patritti ◽  
Laura Stana ◽  
Sean M. Tweedy
Keyword(s):  
Vertical Velocity ◽  
Important Determinant ◽  
Elite Athletes ◽  
Center Of Mass ◽  
Transtibial Amputation ◽  
Jump Performance ◽  
Performance Variables ◽  
Jump Distance ◽  
Long Jump ◽  
The Relationship

The purpose of this study was to evaluate the extent to which residual shank length affects long jump performance of elite athletes with a unilateral transtibial amputation. Sixteen elite, male, long jumpers with a transtibial amputation were videoed while competing in major championships (World Championships 1998, 2002 and Paralympic Games, 2004). The approach, take-off, and landing of each athlete’s best jump was digitized to determine residual and intact shank lengths, jump distance, and horizontal and vertical velocity of center of mass at touchdown. Residual shank length ranged from 15 cm to 38 cm. There were weak, nonsignificant relationships between residual shank length and (a) distance jumped (r = 0.30), (b) horizontal velocity (r = 0.31), and vertical velocity (r = 0.05). Based on these results, residual shank length is not an important determinant of long jump performance, and it is therefore appropriate that all long jumpers with transtibial amputation compete in the same class. The relationship between residual shank length and key performance variables was stronger among athletes that jumped off their prosthetic leg (N = 5), and although this result must be interpreted cautiously, it indicates the need for further research.

OPTIMAL STANDING LONG JUMP SIMULATION FROM DIFFERENT STARTING POSTURES

2005 ◽  
Vol 05 (02) ◽  
pp. 203-215 ◽  
Author(s):  
KUANG-YOU B. CHENG ◽  
WEN-CHIEN CHEN
Keyword(s):  
Center Of Mass ◽  
Joint Torque ◽  
Horizontal Distance ◽  
Human Body Model ◽  
Body Model ◽  
Standing Long Jump ◽  
Jump Distance ◽  
Torque Generation ◽  
Long Jump ◽  
Simulation Results

A planar 4-segment human body model is used to simulate and study the effects of starting posture on standing long jumping performance. The model consists of frictionless hinge joints and is driven by joint torque actuators. The four segments represent feet, shanks, thighs, and trunk with head and arms. Movement simulations start from three different postures: high squat, squat, and low squat. The control variables are the joint torque activation levels and takeoff time. The objective function is the maximum horizontal distance from the toe point at takeoff to the center of mass (c.m.) position at landing. Optimal simulation results agree reasonably well with measurements. Different from previous high jump simulation study, slight dependence of initial posture on jump distance is found. Longer jump distance from a higher initial posture is probably due to greater range of countermovement that results in larger extension joint torque generation.

Simulation Study on the Sports Biomechanical Characteristics of Long Jumpers’ Take-off Techniques

2021 ◽  
Vol 7 (5) ◽  
pp. 4963-4975
Author(s):  
Chao Zhou
Keyword(s):  
Reference Data ◽  
Factors Affecting ◽  
Advantages And Disadvantages ◽  
Technical Requirements ◽  
Long Jump ◽  
Technical Factors ◽  
Research Objects ◽  
Run Up ◽  
The Stability ◽  
Factors Affecting Performance

Objectives: Based on the principles of sports biomechanics and long jump technical requirements, the technical factors affecting performance are discussed. Provide reference for the teaching, training and scientific research of the long jump project in China, improve and perfect the special sports technology and quality. Methods: In this study, the excellent men’s long jump athletes at home and abroad in recent years are taken as research objects, and the sports biomechanical method is used on the basis of collecting and compiling large amounts of data in previous studies. Results: This paper makes a comparative analysis of the characteristics of run-up and Take-off Techniques of Chinese and foreign elite male long jumpers, in order to find out the advantages and disadvantages of Chinese athletes and provide reference data for the training of Chinese long jumpers. Conclusion: The research shows that the take-off technique is the key in the whole long jump. The take-off angle is an important factor that restricts the performance of long jumpers, and the stability of the brake point when the board is attached is more important.

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