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We study the heartbeat activity of healthy individuals at rest and during exercise. We focus on correlation properties of the intervals formed by successive peaks in the pulse wave and find significant scaling differences between rest and…

Statistical Mechanics · Physics 2009-11-07 Roman Karasik , Nir Sapir , Yosef Ashkenazy , Plamen Ch. Ivanov , Itzhak Dvir , Peretz Lavie , Shlomo Havlin

Human motion trajectory prediction, an essential task for autonomous systems in many domains, has been on the rise in recent years. With a multitude of new methods proposed by different communities, the lack of standardized benchmarks and…

Robotics · Computer Science 2022-07-21 Andrey Rudenko , Luigi Palmieri , Wanting Huang , Achim J. Lilienthal , Kai O. Arras

We formulate an optimization of a bicycle ascent time under the constraints of the average, maximum, and minimum powers. In contrast to the first part of this study, we do not restrict the departure to flying starts with an initial speed…

Classical Physics · Physics 2025-07-28 Len Bos , Michael A. Slawinski , Raphaël A. Slawinski , Theodore Stanoev

Athletic training is characterized by physiological systems responding to repeated exercise-induced stress, resulting in gradual alterations in the functional properties of these systems. The adaptive response leading to improved…

Quantitative Methods · Quantitative Biology 2025-06-30 Hilkka Kontro , Armando Mastracci , Stephen S. Cheung , Martin J. MacInnis

Trail running is an endurance sport in which athletes face severe physical challenges. Due to the growing number of participants, the organization of limited staff, equipment, and medical support in these races now plays a key role.…

Applications · Statistics 2020-07-14 Riccardo Fogliato , Natalia L. Oliveira , Ronald Yurko

Traditional force-controlled bipedal walking utilizes highly bent knees, resulting in high torques as well as inefficient, and unnatural motions. Even with advanced planning of center of mass height trajectories, significant amounts of…

Robotics · Computer Science 2019-08-01 Robert J. Griffin , Sylvain Bertrand , Georg Wiedebach , Alexander Leonessa , Jerry Pratt

The collection of active agents often exhibits intriguing statistical and dynamical properties, particularly when considering human crowds. In this study, we have developed a computational model to simulate the recent experiment on real…

Statistical Mechanics · Physics 2025-01-07 Pratikshya Jena , Shradha Mishra

This study analysed sprint kayak pacing profiles in order to categorise and compare an athlete's race profile throughout their career. We used functional principal component analysis of normalised velocity data for 500m and 1000m races to…

Applications · Statistics 2024-07-11 Harry Estreich , Nicola Bullock , Mark Osborne , Edgar Santos-Fernandez , Paul Pao-Yen Wu

In this paper, we study dynamic stability during running, focusing on the effects of speed and the use of a leg prosthesis. We compute and compare the maximal Lyapunov exponents of kinematic time-series data from subjects with and without…

Though athletics statistics are abundant, it is a difficult task to quantitatively compare performances from different events of track, field, and road running in a meaningful way. There are several commonly-used methods, but each has its…

Applications · Statistics 2014-08-27 Brian Godsey

In empirical studies of random walks, continuous trajectories of animals or individuals are usually sampled over a finite number of points in space and time. It is however unclear how this partial observation affects the measured…

Physics and Society · Physics 2018-03-13 Riccardo Gallotti , Rémi Louf , Jean-Marc Luck , Marc Barthelemy

A number of studies showed association of mental status with heart rate variability. This work discovered a feature of frequency structure of heart rate variability that is associated with mental readiness. In three independent groups of…

Tissues and Organs · Quantitative Biology 2010-05-07 V. Mukhin , V. Klimenko

In this work, a heuristic as operational tool to estimate the lactate threshold and to facilitate its integration into the training process of recreational runners is proposed. To do so, we formalize the principles for the lactate threshold…

Applications · Statistics 2019-08-22 U. Etxegarai , E. Portillo , J. Irazusta , L. A. Koefoed , N. Kasabov

Sports organizations often want to estimate athlete strengths. For games with scored outcomes, a common approach is to assume observed game scores follow a normal distribution conditional on athletes' latent abilities, which may change over…

Methodology · Statistics 2023-07-18 Jonathan Che , Mark Glickman

The efficient calculation of rare-event kinetics in complex dynamical systems, such as the rate and pathways of ligand dissociation from a protein, is a generally unsolved problem. Markov state models can systematically integrate ensembles…

Chemical Physics · Physics 2016-02-03 Benjamin Trendelkamp-Schroer , Frank Noe

Control of systems of automated guided vehicles involves action planning at many levels. For efficient control of these systems, accurate estimation of cost parameters (speed, energy, task completion performance, \textit{et~cetera} is…

Robotics · Computer Science 2018-08-24 Pragna Das , Lluís Ribas Xirgo

Fueled by motion prediction competitions and benchmarks, recent years have seen the emergence of increasingly large learning based prediction models, many with millions of parameters, focused on improving open-loop prediction accuracy by…

A quasi-physical model (having both physical and mathematical roots) of sprint performances is presented, accounting for the influence of drag modification via wind and altitude variations. The race time corrections for both men and women…

Popular Physics · Physics 2009-11-06 J. R. Mureika

This paper formulates optimal pacing of a cyclist on hilly terrain time-trials as a minimum-time optimal control problem. Maximal power of a cyclist serves as a time-varying constraint and depends on fatigue and recovery which are captured…

Systems and Control · Electrical Eng. & Systems 2021-10-29 Faraz Ashtiani , Vijay Sarthy M Sreedhara , Ardalan Vahidi , Randolph Hutchison , Gregory Mocko

Arrhythmia is an abnormality of the heart's rhythm, caused by problems in the conductive system and resulting in irregular heartbeats. There is increasing evidence that undertaking frequent endurance sports training elevates one's risk of…

Applications · Statistics 2026-01-06 Andrew Nugent , Yi Ting Loo , Jack Buckingham
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