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Variations of Workload Indices Prior to Injuries: A Study in Trail Runners

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  • Sérgio Matos

    (Escola Superior Desporto e Lazer, Instituto Politécnico de Viana do Castelo, Rua Escola Industrial e Comercial de Nun’Álvares, 4900-347 Viana do Castelo, Portugal
    Faculty of Educational Sciences and Sports Sciences, University of Vigo, 36005 Pontevedra, Spain)

  • Filipe Manuel Clemente

    (Escola Superior Desporto e Lazer, Instituto Politécnico de Viana do Castelo, Rua Escola Industrial e Comercial de Nun’Álvares, 4900-347 Viana do Castelo, Portugal
    Instituto de Telecomunicações, Delegação da Covilhã, 1049-001 Lisboa, Portugal)

  • Rui Silva

    (Escola Superior Desporto e Lazer, Instituto Politécnico de Viana do Castelo, Rua Escola Industrial e Comercial de Nun’Álvares, 4900-347 Viana do Castelo, Portugal)

  • José María Cancela Carral

    (Faculty of Educational Sciences and Sports Sciences, University of Vigo, 36005 Pontevedra, Spain)

Abstract

The purpose of this study was to compare the variations of weekly workload indices of internal and external load measures across the three weeks prior to injury occurrences in trail runners. Twenty-five trail runners (age: 36.23 ± 8.30 years old; body mass: 67.24 ± 5.97 kg; height: 172.12 ± 5.12 cm) were monitored daily for 52 weeks using global positioning systems (GPSs) to determine the total distance covered. Additionally, a rate of perceived exertion (RPE) scale was applied to determine session-RPE (sRPE: RPE multiplied by training time). The accumulated load (AL), acute: chronic workload ratio (ACWR), training monotony (TM), and training strain (TS) indices were calculated weekly for each runner. During the period of analysis, the injury occurrences were recorded. The differences were observed in AL and ACWR for sRPE and training time were significantly greater during the injury week when compared to the previous weeks. Similar evidence was found in TM and TS indices for sRPE, training time, and total distance. Furthermore, no meaningful differences were observed in AL and ACWR for total distance in the weeks prior to injury occurrence. Nevertheless, significant between-subjects variability was found, and this should be carefully considered. For that reason, an individualized analysis of the workload dynamics is recommended, avoiding greater spikes in load by aiming to keep a progressive increment of load without consequences for injury risk.

Suggested Citation

  • Sérgio Matos & Filipe Manuel Clemente & Rui Silva & José María Cancela Carral, 2020. "Variations of Workload Indices Prior to Injuries: A Study in Trail Runners," IJERPH, MDPI, vol. 17(11), pages 1-14, June.
    • Handle: RePEc:gam:jijerp:v:17:y:2020:i:11:p:4037-:d:367867
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    References listed on IDEAS

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    1. Daniel Rojas-Valverde & Braulio Sánchez-Ureña & José Pino-Ortega & Carlos Gómez-Carmona & Randall Gutiérrez-Vargas & Rafael Timón & Guillermo Olcina, 2019. "External Workload Indicators of Muscle and Kidney Mechanical Injury in Endurance Trail Running," IJERPH, MDPI, vol. 16(20), pages 1-13, October.
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    Cited by:

    1. Sérgio Matos & Filipe Manuel Clemente & Rui Silva & Joel Pereira & José María Cancela Carral, 2020. "Performance and Training Load Profiles in Recreational Male Trail Runners: Analyzing Their Interactions during Competitions," IJERPH, MDPI, vol. 17(23), pages 1-15, November.

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