Visual search, movement behaviour and boat control during the windward mark rounding in sailing

Pluijms, Joost P.; Cañal‐Bruland, Rouwen; Hoozemans, M.J.M.; Savelsbergh, Geert J.P.

doi:10.1080/02640414.2014.946075

Cited by 16 publications

(16 citation statements)

References 31 publications

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“…Thus, it would be of worthwhile consideration for coaches and support staff to invest time and resource in understanding how to profile, monitor and train a windsurfer's ability to achieve a high WWM position after the 1 st upwind leg (Pluijms, Cañal-Bruland, Hoozemans & Savelsbergh, 2015).…”

Section: Discussionmentioning

confidence: 99%

Descriptive analysis of Olympic class windsurfing competition during the 2017-2018 regatta season

Anastasiou

Jones

Mullan³

et al. 2019

International Journal of Performance Analysis in Sport

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The aim of the present study was to describe race characteristics of top three finishers for different wind speed categories within Olympic windsurfing competition. Global position system data was analysed from 94 races (47 Men's races & 47 Women's races) across five regattas during the 2017-2018 windsurfing season. Medium wind speeds (8.1 to 15.9 kts) represented the greatest proportion of races for Men (43 %) and Women (34 %). Large variations in race time (825-2105 s), distance (2167-11786 m) and board speeds (3.32-16.78 kts) were experienced across the wind categories. Although race time for Women was non-significant (P = 0.101) between wind categories. Low 1 st windward mark position was reported in both Men (1 st = 2.2 ± 2.1, 2 nd = 3.7 ± 2.6, 3 rd = 5.0 ± 3.3) and Women (1 st = 2.2 ± 1.9, 2 nd = 3.5 ± 2.2, 3 rd = 4.0 ± 2.8) who finished on the podium. The findings may provide useful information to coaches and sport scientists in the planning and implementation of specific training interventions. Furthermore, the detail of 1 st upwind characteristics (time, distance, board speed and manoeuvres) could be used to enhance the ecological validity of laboratory-based testing.

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Section: Discussionmentioning

confidence: 99%

Descriptive analysis of Olympic class windsurfing competition during the 2017-2018 regatta season

Anastasiou

Jones

Mullan³

et al. 2019

International Journal of Performance Analysis in Sport

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“…The regression analyses were performed using a forward stepwise method (for more information, see Twisk, 2003Twisk, , 2007and Pluijms, Cañal-Bruland, Hoozemans, & Savelsbergh, 2015). All possible predictors were first examined regarding their relationship with the outcome variable using single regression analyses.…”

Section: Discussionmentioning

confidence: 99%

Effects of threat, trait anxiety and state anxiety on police officers’ actions during an arrest

Renden

Landman

Daalder

et al. 2015

Legal Criminol Psychol

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Purpose We investigated the effects of threat and trait anxiety on state anxiety and how that affects police officers’ actions during an arrest. Most experiments on police performance under anxiety test the performance of one particular skill. Yet, police work often involves concerted use of a combination of skills. Methods We created situations – with two different levels of threat – in which officers had to choose and initiate their actions to control and arrest a non‐cooperative suspect. We examined whether threat, trait anxiety and state anxiety influenced decision‐making (e.g., choosing the appropriate actions) and performance (e.g., quality of communication and the execution of skills). Results Trait anxiety affected the level of state anxiety, but not any of the decision‐making and performance variables. As for decision‐making, results showed that only threat determined which action officers took to gain control over the suspect. As for performance, higher levels of state anxiety were accompanied by lower scores of overall performance, communication, proportionality of applied force and quality of skill execution. Conclusion It is concluded that state anxiety not only impairs performance of single perceptual‐motor tasks, but also relevant accompanying skills such as communicating and applying appropriate force. We argue that police training should focus on an integrated set of decision‐making and perceptual‐motor skills and not just on the performance of isolated motor skills.

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“…It can be activated by remote control, weighs 0.74 kg, and has Wi-Fi and a 170° field of view (GoPro 2014; Kim et al 2014). Its use was only recently introduced in the assessment of sport performance from the biomechanics approach, especially in kinematic studies of human motion in sprint running (Gasser et al 2013;Born et al 2014), in an aquatic environment, in order to identify the kinematic pattern of the foot during a treadmill run, on the floor and in the water (Hoover 2014), or very close to the water, as in the investigation of sailor performance (Pluijms et al 2014). Clemente et al (2014) used a single GoPro® for tracking soccer players; however, they only partially reported the tracking error values and the model of distortion correction.…”

Section: Discussionmentioning

confidence: 99%

Tracking futsal players with a wide-angle lens camera: accuracy analysis of the radial distortion correction based on an improved Hough transform algorithm

Vieira

Pagnoca

Milioni

et al. 2015

Computer Methods in Biomechanics and Biomedical Engineering: Im

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2017) Tracking futsal players with a wide-angle lens camera: accuracy analysis of the radial distortion correction based on an improved Hough transform algorithm, physical education and sport of ribeirão preto, university of são paulo, ribeirão preto, Brazil; b Faculty of pharmaceutical sciences of ribeirão preto, university of são paulo, ribeirão preto, Brazil; c institute of Biosciences, são paulo state university "Júlio de mesquita Filho", rio Claro, Brazil; d departamento de ingeniería electrónica y automática, Ctim (image technology Center), universidad de las palmas de gran Canaria, las palmas de gran Canaria (Canary islands), spain ABSTRACT The aim of this study was to assess the applicability and reliability of a single wide-angle lens GoPro ® camera for tracking and kinematics analysis of futsal players. An official game of a Brazilian professional team in the quarter-final round of the 2013 São Paulo futsal league was recorded by four digital video cameras (30 Hz; 720 × 480) placed at the highest points of the court (40 × 20 m; FIFA standard). We compared tracking performed with three cameras equipped with conventional lenses to a GoPro® camera with a wide-angle lens with a 170° field of view. Manual and automatic tracking of players trajectories (n = 5; 23.20 ± 2.39 years) during competition and in a controlled environment were performed. We found that the root-mean-square error calculated to determine the position on the court based on images captured with a GoPro® camera was 0.32 m and for the velocity was 0.71 m s −1 . A 5-min excerpt of the game showed an average difference of 2.11% between the total distance covered obtained by tracking with the GoPro® with radial distortion correction (438.97 ± 164.65 m), and cameras with conventional lenses (449.54 ± 170.92 m). Temporal correlation analysis confirmed the great similarity between the reconstructed trajectories obtained by these cameras (r = 0.99 for movements on both x and y axes). We showed that a single GoPro® Hero3+ can provide reliable kinematic analysis of computational tracking based on videogrammetry for futsal, using the Hough transform and division model technique for radial distortion correction. ARTICLE HISTORY

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Visual search, movement behaviour and boat control during the windward mark rounding in sailing

Cited by 16 publications

References 31 publications

Descriptive analysis of Olympic class windsurfing competition during the 2017-2018 regatta season

Descriptive analysis of Olympic class windsurfing competition during the 2017-2018 regatta season

Effects of threat, trait anxiety and state anxiety on police officers’ actions during an arrest

Tracking futsal players with a wide-angle lens camera: accuracy analysis of the radial distortion correction based on an improved Hough transform algorithm

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