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Growth, maturity status, motor proficiency and fitness of participants and non-participants in organised sports 7-10 years.
Ann Hum Biol
February 2024
Department of Physical Education and Sport, University of Madeira, Funchal, Portugal.
Article Synopsis
- Contemporary children have limited free play time, with many engaging in organized sports.
- A study assessed growth, motor skills, and physical fitness in 234 boys and 235 girls aged 7-10 to compare sport participants and non-participants.
- Results showed that sport participants were generally more physically active, with boys exhibiting greater height and weight at ages 7-8, while girls demonstrated better motor skills in various tasks at different ages.
Simplified internal models in human control of complex objects.
PLoS Comput Biol
November 2024
Institute for Experiential Robotics, Northeastern University, Boston, Massachusetts, United States of America.
Humans are skillful at manipulating objects that possess nonlinear underactuated dynamics, such as clothes or containers filled with liquids. Several studies suggested that humans implement a predictive model-based strategy to control such objects. However, these studies only considered unconstrained reaching without any object involved or, at most, linear mass-spring systems with relatively simple dynamics.
View Article and Find Full Text PDFNature's All-in-One: Multitasking Robots Inspired by Dung Beetles.
Adv Sci (Weinh)
December 2024
Bio-inspired Robotics and Neural Engineering Lab, School of Information Science and Technology, Vidyasirimedhi Institute of Science and Technology, Rayong, 21210, Thailand.
Dung beetles impressively coordinate their 6 legs to effectively roll large dung balls. They can also roll dung balls varying in the weight on different terrains. The mechanisms underlying how their motor commands are adapted to walk and simultaneously roll balls (multitasking behavior) under different conditions remain unknown.
View Article and Find Full Text PDFSexual dimorphism and the impact of aging on ball rolling-associated locomotor behavior in Drosophila.
Biol Open
November 2024
Chronobiology Laboratory, School of Biology, Indian Institute of Science Education and Research, Thiruvananthapuram, Kerala 695551, India.
Insects exhibit a remarkable ability to interact with inanimate objects to facilitate essential behaviors such as foraging, reproduction, shelter building, and defense. In this study, we assessed whether Drosophila interacted with inanimate objects when they were suspended on their wings and provided with a thermocol ball (foam ball). Drosophila indeed exhibited ball rolling behavior.
View Article and Find Full Text PDFA Calculation Method of Bearing Balls Rotational Vectors Based on Binocular Vision Three-Dimensional Coordinates Measurement.
Sensors (Basel)
October 2024
School of Aeronautics and Astronautics, Sichuan University, Chengdu 610065, China.
The rotational speed vectors of the bearing balls affect their service life and running performance. Observing the actual rotational speed of the ball is a prerequisite for revealing its true motion law and conducting sliding behavior simulation analysis. To address the need for accuracy and real-time measurement of spin angular velocity, which is also under high-frequency and high-speed ball motion conditions, a new measurement method of ball rotation vectors based on a binocular vision system is proposed.
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