title: Complex network models reveal correlations among network metrics, exercise intensity and role of body changes in the fatigue process.
abstract: The aims of the present study were analyze the fatigue process at distinct intensity efforts and to investigate its occurrence as interactions at distinct body changes during exercise, using complex network models. For this, participants were submitted to four different running intensities until exhaustion, accomplished in a non-motorized treadmill using a tethered system. The intensities were selected according to critical power model. Mechanical (force, peak power, mean power, velocity and work) and physiological related parameters (heart rate, blood lactate, time until peak blood lactate concentration (lactate time), lean mass, anaerobic and aerobic capacities) and IPAQ score were obtained during exercises and it was used to construction of four complex network models. Such models have both, theoretical and mathematical value, and enables us to perceive new insights that go beyond conventional analysis. From these, we ranked the influences of each node at the fatigue process. Our results shows that nodes, links and network metrics are sensibility according to increase of efforts intensities, been the velocity a key factor to exercise maintenance at models/intensities 1 and 2 (higher time efforts) and force and power at models 3 and 4, highlighting mechanical variables in the exhaustion occurrence and even training prescription applications.
authors.affiliation: University of Campinas, School of Applied Sciences, Laboratory of Applied Sport Physiology, Limeira, SP, 13484-350, Brazil.
authors.forename: Vanessa Helena
authors.initials: VH
authors.lastname: Pereira
authors.affiliation: University of Campinas, School of Applied Sciences, Laboratory of Applied Sport Physiology, Limeira, SP, 13484-350, Brazil.
authors.forename: Maria Carolina Traina
authors.initials: MC
authors.lastname: Gama
authors.affiliation: University of Campinas, School of Applied Sciences, Laboratory of Applied Sport Physiology, Limeira, SP, 13484-350, Brazil.
authors.forename: Filipe Antônio Barros
authors.initials: FA
authors.lastname: Sousa
authors.affiliation: Naval Postgraduate School, Center for Homeland Defense and Security, (Emeritus) Monterey, CA, 93943, United States.
authors.forename: Theodore Gyle
authors.initials: TG
authors.lastname: Lewis
authors.affiliation: University of Campinas, School of Applied Sciences, Laboratory of Applied Sport Physiology, Limeira, SP, 13484-350, Brazil.
authors.forename: Claudio Alexandre
authors.initials: CA
authors.lastname: Gobatto
authors.affiliation: University of Campinas, School of Applied Sciences, Laboratory of Applied Sport Physiology, Limeira, SP, 13484-350, Brazil.
authors.forename: Fúlvia Barros
authors.initials: FB
authors.lastname: Manchado-Gobatto
mesh_terms: D000328:Adult; D005080:Exercise Test; D005221:Fatigue / Q000378:metabolism / Q000473:pathology*; D006339:Heart Rate / Q000502:physiology; D006801:Humans; D019344:Lactic Acid / Q000097:blood; D008297:Male; D008962:Models, Theoretical; D012420:Running; D055815:Young Adult
chemical_list: D019344:Lactic Acid