Objective: To identify whether movement patterns during a standardized submaximal running test (SSRT), assessed by accelerometry, were associated with improvements in endurance exercise performance.
Design: A retrospective analysis of data collected from the 2018-2019 Australian cricket preseason.
Methods: Thirty-nine high-performance male cricket players were studied (25±3 years, 82±6kg, 183±6cm). SSRT was performed monthly prior to a two kilometre (km) running time trial (2kmTT). SSRT involved running between markers, positioned twenty metres apart, for three minutes. Foot strikes were timed to a metronome (154beats/min) to elicit a running speed of ˜eight km/h. Triaxial accelerometers were worn in vests on the upper back and used to assess PlayerLoad medio-lateral vector (PL1Dside%), vertical vector (PL1Dup%) and anterior-posterior vector (PL1Dfwd%) were assessed.
Results: 2kmTT performance improved over the study period (p<0.05). PlayerLoad vectors during the first minute of SSRT were not related to 2kmTT performance (p>0.23). During the second and third minutes there were positive associations between 2kmTT (run time) and PL1Dside% (SSRT2min, β 2.12, p<0.03, 95% CI: 0.22-4.01; SSRT3min, β 2.30, p<0.03, 95% CI:0.32-4.29), but not PL1Dup% (SSRT2min, β -0.15, p=0.77, 95% CI: -1.13-0.83; SSRT3min, β -0.15, p=0.77, 95% CI: -1.11-0.87) or PL1Dfwd% (SSRT2min, β -0.45, p=0.42, 95% CI: -1.49-0.62; SSRT3min, B-0.45, p=0.40, 95% CI: -1.51-0.60).
Conclusion: Assessment of PL1Dside% during the second or third minutes of SSRT may inform how an athlete's endurance exercise performance is responding to changes in training load.
Keywords: Fatigue; PlayerLoad; Two kilometre time trial.
Copyright © 2019 Sports Medicine Australia. Published by Elsevier Ltd. All rights reserved.