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Oğuz K. Esentürk and Erkan Yarımkaya

The aim of this study was to evaluate the feasibility and potential efficacy of a WhatsApp-based physical activity for children with autism spectrum disorder (ASD). Fourteen parents and their children with ASD participated in the study. The intervention included parents conducting physical activities with their children with ASD for 4 weeks. Physical activity contents were provided to parents via the WhatsApp group. The data were collected through the Leisure Time Exercise Questionnaire and a feasibility questionnaire adapted from previous studies examining the feasibility of web-based physical activities. Parents reported that WhatsApp-based physical activities were a feasible intervention to increase the physical activity level of their children with ASD and stated that the contents of the physical activity shared in the WhatsApp group were useful. The findings provided preliminary evidence for the use of WhatsApp-based physical activities to increase the physical activity level of children with ASD who stay at home due to the pandemic.

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Floor A.P. van den Brandt, Inge K. Stoter, Ruby T.A. Otter, and Marije T. Elferink-Gemser

Purpose: In long-track speed skating, drafting is a commonly used phenomenon in training; however, it is not allowed in time-trial races. In speed skating, limited research is available on the physical and psychological impact of drafting. The aim of this study was to determine the influence of “skating alone,” “leading,” or “drafting” on physical intensity (heart rate and blood lactate) and perceived intensity (perceived exertion) of speed skaters. Methods: Twenty-two national-level long-track speed skaters with a mean age of 19.3 (2.6) years skated 5 laps, with similar external intensity in 3 different conditions: skating alone, leading, or drafting. Repeated-measures analysis of variance showed differences between the 3 conditions, heart rate (F2,36 = 10.546, P < .001), lactate (F2,36 = 12.711, P < .001), and rating of perceived exertion (F2,36 = 5.759, P < .01). Results: Heart rate and lactate concentration were significantly lower (P < .001) when drafting compared with leading (heart rate Δ = 7 [8] beats·min–1, 4.0% [4.7%]; lactate Δ = 2.3 [2.3] mmol/L, 28.2% [29.9%]) or skating alone (heart rate Δ = 8 [7.1] beats·min–1, 4.6% [3.9%]; lactate Δ = 2.8 [2.5] mmol/L, 33.6% [23.6%]). Rating of perceived exertion was significantly lower (P < .01) when drafting (Δ = 0.8 [1.0], 16.5% [20.9%]) or leading (Δ = 0.5 [0.9], 7.7% [20.5%]) versus skating alone. Conclusions: With similar external intensity, physical intensity, as well as perceived intensity, is reduced when drafting in comparison with skating alone. A key finding of this study is the psychological effect: Skating alone was shown to be more demanding than leading, whereas leading and drafting were perceived to be similar in terms of perceived exertion. Knowledge about the reduction of internal intensity for a drafting skater compared with leading or skating alone can be used by coaches and trainers to optimize training conditions.

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Takeshi Koyama, Akira Rikukawa, Yasuharu Nagano, Shogo Sasaki, Hiroshi Ichikawa, and Norikazu Hirose

Purpose: To evaluate the effect of the number of high-acceleration movements on muscle damage and the rating of perceived exertion (RPE) in basketball games. Methods: Twenty-one male collegiate basketball players (mean age, 20.0 [1.0] y) were included. A triaxial accelerometer was used to measure acceleration in basketball-simulated scrimmages. To detect higher physical load during the actual game, the resultant acceleration was calculated, and 3 thresholds were set: >4G, >6G, and >8G resultant accelerations. The number of the extracted movements was calculated at each acceleration threshold. Plasma creatine kinase (CK) levels (marker of muscle damage) were estimated before and 24 hours after the match, and the session-RPE load was calculated within 30 minutes after the match. Pearson product-moment correlations with 95% confidence intervals were used to determine the relationships between the number of high-acceleration movements and plasma CK and session-RPE load. Results: Significant correlations were observed between the number of high-acceleration movements >8G and CK level (r = .74; 95% confidence interval, 0.44–0.89; P < .0001). Furthermore, the correlation coefficient between acceleration and CK increased with increased acceleration threshold (>4G: r = .65; >6G: r = .69). Contrastingly, the correlation coefficient between acceleration and the session-RPE load decreased with increased acceleration threshold (>4G: r = .72; >6G: r = .52; >8G: r = .43). Conclusions: The session-RPE reflects the total amount of movement, while the high-acceleration movement reflects the momentary large impact load or intensity, and they evaluated different factors. Basketball coaching and conditioning professionals recommended combining acceleration and session-RPE when monitoring the load of athletes.

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Jacob Walther, Roy Mulder, Dionne A. Noordhof, Thomas A. Haugen, and Øyvind Sandbakk

Purpose: To quantify peak age and relative performance progression toward peak age in cross-country skiing according to event type, sex, and athlete performance level. Methods: International Ski Federation (FIS) points (performance expressed relative to the best athlete) of athletes born between 1981 and 1991, competing in junior world championships or finishing top 30 in world championships or Olympics, were downloaded from the FIS website. Individual performance trends were derived by fitting a quadratic curve to each athletes FIS point and age data. Results: Peak age was 26.2 (2.3) years in distance and 26.0 (1.7) years in sprint events. The sex difference in peak age in sprint events was ∼0.8 years (small, P = .001), while there was no significant sex difference in peak age in distance events (P = .668). Top performers displayed higher peak ages than other athletes in distance (mean difference, ±95% confidence limits = 1.6 y, ±0.6 y, moderate, P < .001) and sprint events (1.0, ±0.6 y, moderate, P < .001). FIS point improvement over the 5 years preceding peak age did not differ between event types (P = .325), while men improved more than women in both events (8.8, ±5.4%, small, P = .002 and 7.5, ±6.4%, small, P = .002). Performance level had a large effect on improvement in FIS points in both events (P < .001). Conclusion: This study provides novel insights on peak age and relative performance progression among world-class cross-country skiers and can assist practitioners, sport institutions, and federations with goal setting and evaluating strategies for achieving success.

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Víctor Rodríguez-Rielves, Alejandro Martínez-Cava, Ángel Buendía-Romero, José Ramón Lillo-Beviá, Javier Courel-Ibáñez, Alejandro Hernández-Belmonte, and Jesús G. Pallarés

Purpose: To examine the reproducibility (intradevice and interdevice agreement) of the Rotor 2INpower device under a wide range of cycling conditions. Methods: Twelve highly trained male cyclists and triathletes completed 5 cycling tests, including graded exercise tests at different cadences (70–100 rpm), workloads (100–650 W), pedaling positions (seated and standing), and vibration conditions (20–40 Hz) and an 8-second maximal sprint (>1000 W). An intradevice analysis included a comparison between the power output registered by 3 units of Rotor 2INpower, whereas the power output provided by each one of these units and the gold-standard SRM crankset were compared for the interdevice analysis. Among others, statistical calculations included the standard error of measurement, expressed in absolute (in watts) and relative terms as the coefficient of variation (CV). Results: Except for the graded exercise test seated at 100 rpm/100 W (CV = 10.2%), the intradevice analysis showed an acceptable magnitude of error (CV ≤ 6.9%, standard error of measurement ≤ 12.3 W) between the 3 Rotor 2INpower. Similarly, these 3 units showed an acceptable agreement with the gold standard in all graded exercise test situations (CV ≤ 4.0%, standard error of measurement ≤ 13.1 W). On the other hand, both the intradevice and interdevice agreements proved to be slightly reduced under high cadences (intradevice: CV ≤ 10.2%; interdevice: CV ≤ 4.0%) and vibration (intradevice: CV ≤ 4.0%; interdevice: CV ≤ 3.6%), as well as during standing pedaling (intradevice: CV ≤ 4.1%; interdevice: CV ≤ 2.5%). Although within the limits of an acceptable agreement, measurement errors increased during the sprint tests (CV ≤ 7.4%). Conclusions: Based on these results, the Rotor 2INpower could be considered a reproducible tool to monitor power output in most cycling situations.

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Erin E. Dierickx, Samantha E. Scarneo-Miller, and Douglas J. Casa

Emergency action plans (EAPs) are considered best practice for the preparation of catastrophic events in sports and, when adequate, can effectively improve patient outcomes. The EAPs should include a collaboration of all personnel involved in the sporting activities, with high school coaches being well-positioned to implement these plans. Therefore, coaches can have a direct influence on the health and safety of their athletes through their involvement in an emergency response. The purpose of this study was to evaluate the understanding and adoption of EAPs as reported by coaches. A web-based questionnaire assessed adoption of an EAP; decisional stages for adoption of components of an EAP; and various characteristics (e.g., access to an athletic trainer facilitators and barriers). A total of 720 responses were included in this study. Nearly 25% of coaches reported being unaware if their school had an EAP, and coaches were more likely to adopt a comprehensive EAP if their school had access to an athletic trainer. A majority of coaches perceived financial assistance as a facilitator and financial limitations as a barrier for EAP implementation. The findings of this investigation illustrate the need for improved coaches’ educational awareness of emergency preparedness strategies within the high school setting.

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Timothy J. Fulton, Marissa N. Baranauskas, and Robert F. Chapman

Some track-and-field national governing bodies send athletes to World Championship and Olympic Games (WC/OG) to gain experience that may positively impact future success, even though athletes may not be expected to place high or medal. However, it is unclear if this strategy is advantageous for future medal attainment. Purpose: To determine if participation and/or advancement at a track-and-field athlete’s first WC/OG influences the odds of future medaling. Methods: Performances of US track-and-field athletes who made their first WC/OG team during 2000–2013 were tracked through 2016 to stratify athletes into categories. Athletes who medaled on their first team or never made a subsequent team (ie, no experience) were compared with athletes who did not medal on their first team but made subsequent teams (ie, experience). The experience group was further divided into athletes who advanced or did not advance out of the initial round at their first competition for a secondary analysis. Odds ratios (ORs) were calculated using logistic regression to measure the association between experience level and medaling. Results: A significant OR was obtained for advanced versus did not advance (OR = 2.29, 95% confidence interval, 1.07–4.89, P = .03), but not for experience versus no experience (OR = 1.04, 95% confidence interval, 0.60–1.78, P = .91) group. Conclusions: Advancing out of the initial round of competition during an athlete’s first WC/OG competition is associated with increased odds of future medaling. National governing bodies should consider this “experience threshold” during team selection processes.

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Kim Nguyen, Robert J. Coplan, Kristen A. Archbell, and Linda Rose-Krasnor

The goal of this study was to explore coaches’ beliefs about the role of child and adolescent shyness in team sports. Participants were (N = 496) coaches of children and adolescents from team sport organizations across Canada. Coaches responded to open-ended questions asking about the benefits of team sports participation for shy children and adolescents, as well as the special contributions that shy team members may make to a sports team. Among the results, coaches cited improvements in social skills most often as the primary benefits of engaging in team sports for shy team members. Coaches most frequently listed promoting social inclusion, quiet leadership, and being coachable as specific contributions of shy team members. Some age differences were also noted. Results are discussed in terms of implications of shyness for children and adolescents who participate in organized team sports.

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Erin Centeio, Kevin Mercier, Alex Garn, Heather Erwin, Risto Marttinen, and John Foley

The purpose of this study was to investigate physical education teachers’ perceptions of implementing online physical education during the COVID-19 pandemic as well as to explore their needs with regard to support for future teaching experiences. A total of 4,302 teachers completed four open-ended questions as part of a larger survey. Deductive and inductive qualitative analysis led to three themes: (a) Teachers’ Proud Moments, (b) Help! So Many Obstacles, and (c) Future Challenges. Teachers stated many successes and challenges that they experienced through the COVID-19 pandemic. Many items specifically focused on use and access to technology, student participation, and meeting students’ needs in various ways. Results can provide guidance for how to address the essential components of physical education in the online environment. In addition, results may provide insight to those who educate, train, and prepare teachers to teach in a virtual and/or physically distanced environment.