Variability of PlayerLoad, Bowling Velocity, and Performance Execution in Fast Bowlers Across Repeated Bowling Spells

Abstract

PlayerLoad was found to be stable across the repeated bowling spells in the fast-bowling cohort. Measures of variability and change across the repeated bowling spells were consistent with the performance measure of ball velocity. The stability of PlayerLoad improved when assessed relative to the individual's peak PlayerLoad. Only bowling-execution measures were found to have high variability across the repeated bowling spells. Player- Load provides a stable measure of external workload between fast bowlers.

Wearable microtechnology can accurately identify collision events during professional rugby league match-play

“…That is, of the 245 true-and false-positive collision events ≥2 seconds, 98.4% (n = 241) were true-positive outcomes and 1.6% (n = 4) were false-positive. McNamara et al recently demonstrated that microtechnology: (1) was sensitive to detect bowling counts in cricket fast bowlers, 21 (2) provided a reproducible measure of external workload, 22 and (3) could be used to identify spikes in high-intensity acute:chronic workload ratios. 23 Although the risk of team sport athletes sustaining a contact injury has been associated with poor high-intensity running ability, 24 changes in locomotor distance and acceleration workloads (i.e.…”

The Reliability and Sensitivity of Performance Measures in a Novel Pace-Bowling Test

“…This variable is less reliable than the radial error measurement used in this investigation and others. 3 In terms of sensitivity, although the smallest worthwhile change data were similar between studies, McNamara et al 16 observed with mean delivery rating of perceived exertion could be attributed to the small inter-participant variability in this measure. 18 The ICC is a relative measure of reliability, and examines how well the rank order for a variable is maintained between tests.…”

“…Nevertheless, the smallest worthwhile change of mean radial error and bivariate variable error were 6.9 cm and 8.4 cm respectively; similar to the diameter of a cricket ball (7.11-7.26 cm), and comparable to the smallest worthwhile change of the 'performance execution' measure. 16 However, the 12.5% CV in mean radial error is lower than the 20-89% CV reported in the performance execution variable. 16 The measurement of performance execution involved bowlers nominating their delivery length (short, good, or full) and line (>30 cm outside off stump, between off-stump and 30 cm outside off-stump, middle and leg stump, or outside leg stump), with the delivery scored either a 2, 1, or 0, (from digitised footage) based on how well the delivery was executed according to the nomination.…”

“…16 However, the 12.5% CV in mean radial error is lower than the 20-89% CV reported in the performance execution variable. 16 The measurement of performance execution involved bowlers nominating their delivery length (short, good, or full) and line (>30 cm outside off stump, between off-stump and 30 cm outside off-stump, middle and leg stump, or outside leg stump), with the delivery scored either a 2, 1, or 0, (from digitised footage) based on how well the delivery was executed according to the nomination. This variable is less reliable than the radial error measurement used in this investigation and others.…”

“…s -1 . 16 Petersen et al 5 arbitrarily set the smallest worthwhile change for mean ball release speed to be either 1.4 m . s -1 or 0.7 m .…”