scholarly journals Parents’ perception of physical activity and body mass in their children compared to BMI and physical fitness test results – examination of 8369 children

Author(s):  
Aleksandra Niedzielska ◽  
Katarzyna Zaborowska-Sapeta ◽  
Marek Jankowski ◽  
Tomasz Kobus ◽  
Ireneusz Marek Kowalski ◽  
...  

Introduction: The level of parents’ knowledge and ability to evaluate a child’s health condition is crucial when making decisions concerning physical activity levels and dietary patterns. Aim: This study assessed parents’ views versus the actual health status of their children using anthropometric examinations and performance test results. Material and methods: The research involved an examination of 8369 children aged 6–7 years and an analysis of responses provided by parents to a questionnaire of the general health status of children, their physical activity, and estimated average time spent passively. Responses were compared to the results of a performance test and anthropometric measurements, classified according to centile grids for a given age and sex. Results and discussion: In total, 85% of guardians did not notice obesity in a child whose BMI was in the 95th percentile or above. Guardians of children with very bad physical performance evaluated their general health condition as very good (42%) or good (50%), which means that 92% of guardians were not aware of their child’s very low exercise capacity. In total, 75% of guardians of children with very poor fitness believed that their child had a sufficient amount of physical activity during the day. Conclusions: Parents or guardians of children with excessive body weight have a low level of awareness of obesity and have no awareness of their children’s very low physical performance. We conclude that there is a great need for comprehensive education of societies regarding the importance of physical activity and nutrition for the health of children and youth.

2021 ◽  
pp. 1-8
Author(s):  
Junta Iguchi ◽  
Minoru Matsunami ◽  
Tatsuya Hojo ◽  
Yoshihiko Fujisawa ◽  
Kenji Kuzuhara ◽  
...  

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.


2021 ◽  
pp. 089826432110209
Author(s):  
Guilherme M. Balbim ◽  
Susan Aguiñaga ◽  
Olusola A. Ajilore ◽  
Eduardo E. Bustamante ◽  
Kirk I. Erickson ◽  
...  

Objective: To investigate the effects of the BAILAMOSTM dance program on physical activity (PA), cardiorespiratory, and cognitive health. Methods: A parallel, two-armed pilot study was conducted with 57 older Latinos randomized to the BAILAMOSTM dance program ( n = 28) or health education (HE) ( n = 29). We conducted two- and three-way repeated-measures ANOVAs. Results: BAILAMOSTM participants increased participation in leisure moderate-to-vigorous PA (LMVPA) ( F[1,53] = 3.17, p = .048, η2 G = .01) and performance in global cognition relative to HE participants ( F[1,52] = 4.19, p = .045, η2 G = .01). Attendance moderated increases in moderate PA, MVPA, LMVPA, and total PA ( p < .05). Participants of both groups with ≥75% attendance increased participation in PA. Among participants with <75% attendance, BAILAMOSTM participants increased PA relative to HE. Discussion: BAILAMOSTM positively impacted self-reported PA and global cognition in older Latinos. Even smaller doses of dance appear to impact self-reported PA levels.


2019 ◽  
Vol 19 (3) ◽  
pp. 269-277
Author(s):  
Elizabeth A. Gottschlich ◽  
Kandyce Larson ◽  
Blake Sisk ◽  
Mary Pat Frintner

2021 ◽  
Vol 2021 ◽  
pp. 1-13
Author(s):  
Guodong Zhai ◽  
Xujie Qin ◽  
Xing Yang

As a renewable energy source, wind energy has received more and more attention, and the wind power industry has also been advocated and developed by countries all over the world. In the production and use of wind turbines, the design and manufacturing technology of wind turbine bearings is very important. In order to ensure the reliable operation of the wind power main bearing after installation and realize the longest life of it, this paper designs a bearing test bench that can test the performance of the wind power main bearing. It can analyze the temperature, displacement, load, and moment of the key parts of the 5 MW wind power main shaft bearing. The solid modeling of the experimental platform was carried out using the 3D modeling software SolidWorks. Hydraulic loading system and test monitoring system are designed to realize the drive and control of the test bench. Through the established mathematical model, the central load of the hub is converted into the axial cylinder load and the radial cylinder load of the test bench to simulate the actual working conditions of the tested bearing. The test results show that the test bench meets various loading requirements and can reliably complete the task of testing wind power main bearings.


2016 ◽  
Vol 91 ◽  
pp. 161-167 ◽  
Author(s):  
Payam Dadvand ◽  
Xavier Bartoll ◽  
Xavier Basagaña ◽  
Albert Dalmau-Bueno ◽  
David Martinez ◽  
...  

Author(s):  
Makoto SUGIMOTO ◽  
Takaaki ISONO ◽  
Kazuya HAMADA ◽  
Katsumi KAWANO ◽  
Norikiyo KOIZUMI ◽  
...  

2018 ◽  
Vol 146 (2) ◽  
pp. 107-117
Author(s):  
Tadeusz Kuśnierz

APFSDS-T-TP ammunition of home production for 120 mm gun of LEOPARD 2 tank, being on the inventory of the Polish Armed Forces, has not passed the requirements of NO-13-A513 Defence Standard at certification tests against the random vibrations occurring at its tactical transportation inside the tank. Performed tests have indicated that the fulfilment of Standard requirements can be achieved by upgrading the igniting system what also makes the projecting charge design of APFSDS-T-TP ammunition change. The paper describes the research-development work on the upgrading of the igniting system for the cartridges used in 120 mm gun of LEOPARD 2 tank. The designs of the existing and upgraded igniting systems are presented both with the designing changes of projecting charges and ammunition ballistic and performance test results.


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