Int J Sports Med 2022; 43(09): 797-803
DOI: 10.1055/a-1774-2125
Training & Testing

Effect of Fatigue and Graded Running on Kinematics and Kinetics Parameters in Triathletes

1   Institute of Physical Education and Sports, Federal University of Ceará, Fortaleza, Brazil
,
1   Institute of Physical Education and Sports, Federal University of Ceará, Fortaleza, Brazil
,
Christian Emmanuel Torres Cabido
2   Post-Graduate Program in Physical Education – Federal University of Maranhão, Brazil
,
2   Post-Graduate Program in Physical Education – Federal University of Maranhão, Brazil
,
3   Human Performance Laboratory, Pernambuco State University, Recife-PE, Brazil
,
4   Post-Graduate Program in Physical Education – Federal Technological University of Paraná, Curitiba, Brazil
,
5   Graduate Program in Physical Education, Federal University of Rio Grande do Norte, Natal, RN, Brazil
,
6   Department of Physical Education, UNESP, Rio Claro, Brazil
,
7   Biomechanics, Faculty of Sport, University of Porto, Porto, Portugal
,
Túlio Luiz Banja Fernandes
1   Institute of Physical Education and Sports, Federal University of Ceará, Fortaleza, Brazil
› Author Affiliations

Abstract

This study aimed to evaluate the effect of cycling-induced fatigue on subsequent running with different ground inclinations on triathletes. Twenty male triathletes ran on a treadmill at individual speeds, on three inclines: level (0%), 7% uphill (7%), and 7% downhill (−7%). Subsequently, the athletes performed an incremental ramp-to-exhaustion (RTE) protocol on an ergometric bicycle until task failure and repeated the running protocol (POST-RTE). During running and cycling was monitored perceived exertion (RPE) and heart rate (HR). Plantar pressure distribution, peak plantar pressure, total foot area, and ground contact time were measured by an in-shoe sensor. Analysis of variance showed that HR (p=0.001; η2=0.63) and RPE (p=0.001; η2=0.82 large effect) were higher in POST-RTE, without interactions between slopes and fatigue. The heel load showed difference between 0 and 7% and 7 and −7% (p=0.001; η 2=0.44 large effect) with higher value in −7%. The midfoot showed differences between 0 and −7% with higher value in 0% (p=0.03; η 2=0.15 small effect). The contact time showed interactions between fatigue and slopes with a higher value in POST-RTE. Coaches should be aware that training on the uphill and downhill surfaces can alter the plantar load on different foot parts.



Publication History

Received: 22 October 2021

Accepted: 16 February 2022

Accepted Manuscript online:
17 February 2022

Article published online:
08 April 2022

© 2022. Thieme. All rights reserved.

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