Markerless camera-based vertical jump height measurement using OpenPose

BACKGROUND: Few studies have investigated the variations in body composition and performance in Japanese collegiate American-football players. OBJECTIVE: To clarify what characterizes competitors at the highest levels – in the top division or on the starting lineup – we compared players’ body compositions and performance test results. METHODS: This study included 172 players. Each player’s body composition and performance (one-repetition maximum bench press, one-repetition maximum back squat, and vertical jump height) were measured; power was estimated from vertical jump height and body weight. Players were compared according to status (starter vs. non-starter), position (skill vs. linemen), and division (1 vs. 2). Regression analysis was performed to determine characteristics for being a starter. RESULTS: Players in higher divisions and who were starters were stronger and had more power, greater body size, and better performance test results. Players in skill positions were relatively stronger than those in linemen positions. Vertical jump height was a significant predictor of being a starter in Division 1. CONCLUSION: Power and vertical jump may be a deciding factor for playing as a starter or in a higher division.

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Effect of Chiropractic Manipulation on Vertical Jump Height in Young Female Athletes with Talocrural Joint Dysfunction: A Single-Blind Randomized Clinical Pilot Trial

Journal of Manipulative and Physiological Therapeutics ◽

10.1016/j.jmpt.2013.11.004 ◽

2014 ◽

Vol 37 (2) ◽

pp. 116-123 ◽

Cited By ~ 7

Author(s):

Sofia Hedlund ◽

Hans Nilsson ◽

Markus Lenz ◽

Tobias Sundberg

Keyword(s):

Female Athletes ◽

Vertical Jump ◽

Pilot Trial ◽

Young Female ◽

Jump Height ◽

Talocrural Joint ◽

Chiropractic Manipulation ◽

Vertical Jump Height ◽

Single Blind

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Effects of plyometric jump training in female soccer player’s vertical jump height: A systematic review with meta-analysis

Journal of Sports Sciences ◽

10.1080/02640414.2020.1745503 ◽

2020 ◽

Vol 38 (13) ◽

pp. 1475-1487 ◽

Cited By ~ 2

Author(s):

Rodrigo Ramirez-Campillo ◽

Javier Sanchez-Sanchez ◽

Blanca Romero-Moraleda ◽

Javier Yanci ◽

Antonio García-Hermoso ◽

...

Keyword(s):

Systematic Review ◽

Meta Analysis ◽

Vertical Jump ◽

Jump Height ◽

Jump Training ◽

Vertical Jump Height

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Vertical jump fatigue does not affect intersegmental coordination and segmental contribution

Motriz Revista de Educação Física ◽

10.1590/s1980-65742014000300009 ◽

2014 ◽

Vol 20 (3) ◽

pp. 303-309 ◽

Cited By ~ 3

Author(s):

Gleber Pereira ◽

Paulo B. de Freitas ◽

Jose A. Barela ◽

Carlos Ugrinowitsch ◽

André L. F. Rodacki ◽

...

Keyword(s):

Vertical Jump ◽

Coordination Pattern ◽

Jump Height ◽

Movement Duration ◽

Intersegmental Coordination ◽

Vertical Jump Height ◽

Movement Synergy ◽

Vertical Jumps

The aim of this study was to describe the intersegmental coordination and segmental contribution during intermittent vertical jumps performed until fatigue. Seven male visited the laboratory on two occasions: 1) the maximum vertical jump height was determined followed by vertical jumps habituation; 2) participants performed intermittent countermovement jumps until fatigue. Kinematic and kinetic variables were recorded. The overall reduction in vertical jump height was 5,5%, while the movement duration increased 10% during the test. The thigh segment angle at movement reversal significantly increased as the exercise progressed. Non-significant effect of fatigue on movement synergy was found for the intersegmental coordination pattern. More than 90% of the intersegmental coordination was explained by one coordination pattern. Thigh rotation contributed the most to the intersegmental coordination pattern, with the trunk second and the shank the least. Therefore, one intersegmental coordination pattern is followed throughout the vertical jumps until fatigue and thigh rotation contributes the most to jump height.

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Effects of Kettlebell Swing vs. Explosive Deadlift Training on Strength and Power

International Journal of Kinesiology and Sports Science ◽

10.7575//aiac.ijkss.v.5n.1p.1 ◽

2017 ◽

Vol 5 (1) ◽

pp. 1 ◽

Cited By ~ 2

Author(s):

Matthew R. Maulit ◽

David C. Archer ◽

Whitney D. Leyva ◽

Cameron N. Munger ◽

Megan A. Wong ◽

...

Keyword(s):

Vertical Jump ◽

Jump Height ◽

Strength And Conditioning ◽

Vertical Jump Height ◽

Jump Power

Background: Recent research has compared explosive deadlift to kettlebell training observing their effects on strength. The kettlebell swing is a popular practical exercise as it shares share a hip hinge movement with the explosive deadlift, but the two have not been compared. Objectives: The purpose of this study was to compare the effects of kettlebell swing vs. explosive deadlift training on strength and power. Methods: Thirty-one recreationally resistance-trained men (age = 23.1 ± 2.3 years, height = 175.5 ± 6.6 cm, mass = 83.9 ± 13.8 kg, 1RM deadlift = 159.9 ± 31.7 kg) were randomly assigned to one of two groups [kettlebell swing group (KBG) n = 15, or explosive deadlift group (EDLG) n = 16]. Vertical jump height, isometric mid-thigh pull (MTP), and 1RM deadlift were measured pre and post training. Both groups trained twice per week for 4 weeks. Volume and load were increased after the first 2 weeks of training. Results: A 2 (time) x 2 (group) mixed factor ANOVA revealed a significant (P<0.05) increase in deadlift 1RM (pre: 159.9 ± 31.7 kg, post: 168.9 ± 31.8 kg) and vertical jump height (pre: 56.6 ± 9.9 cm, post: 57.9 ± 9.7 cm) for both groups, but were not significantly different between groups. There were no significant changes in MTP. Conclusions: Strength and conditioning professionals may use both kettlebell swings and explosive deadlifts to increase deadlift strength and vertical jump power.

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Reliability and Validity of the Polar V800 Sports Watch for Estimating Vertical Jump Height

Journal of Sports Science and Medicine ◽

10.52082/jssm.2021.149 ◽

2021 ◽

pp. 149-157

Author(s):

Manuel V. Garnacho-Castaño ◽

Marcos Faundez-Zanuy ◽

Noemí Serra-Payá ◽

José L. Maté-Muñoz ◽

Josep López-Xarbau ◽

...

Keyword(s):

High Speed ◽

Vertical Jump ◽

Reliability And Validity ◽

Force Platform ◽

Systematic Bias ◽

High Speed Camera ◽

Jump Height ◽

Random Errors ◽

Physically Active ◽

Vertical Jump Height

This study aimed to assess the reliability and validity of the Polar V800 to measure vertical jump height. Twenty-two physically active healthy men (age: 22.89 ± 4.23 years; body mass: 70.74 ± 8.04 kg; height: 1.74 ± 0.76 m) were recruited for the study. The reliability was evaluated by comparing measurements acquired by the Polar V800 in two identical testing sessions one week apart. Validity was assessed by comparing measurements simultaneously obtained using a force platform (gold standard), high-speed camera and the Polar V800 during squat jump (SJ) and countermovement jump (CMJ) tests. In the test-retest reliability, high intraclass correlation coefficients (ICCs) were observed (mean: 0.90, SJ and CMJ) in the Polar V800. There was no significant systematic bias ± random errors (p > 0.05) between test-retest. Low coefficients of variation (<5%) were detected in both jumps in the Polar V800. In the validity assessment, similar jump height was detected among devices (p > 0.05). There was almost perfect agreement between the Polar V800 compared to a force platform for the SJ and CMJ tests (Mean ICCs = 0.95; no systematic bias ± random errors in SJ mean: -0.38 ± 2.10 cm, p > 0.05). Mean ICC between the Polar V800 versus high-speed camera was 0.91 for the SJ and CMJ tests, however, a significant systematic bias ± random error (0.97 ± 2.60 cm; p = 0.01) was detected in CMJ test. The Polar V800 offers valid, compared to force platform, and reliable information about vertical jump height performance in physically active healthy young men.

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