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Andrew Thomas, Brian Dawson and Carmel Goodman

Purpose:

The purpose of the study was to determine the reliability of yo-yo intermittent recovery test (yo-yo) scores and their degree of association with a 20-m shuttle run (20MSR) and VO2max values.

Methods:

Subjects were elite (Australian Football League [AFL], n = 23), state-level (hockey, n = 15, and cricket, n = 27), and recreational team-sport players (n = 33). All performed a 20MSR and the yo-yo at either level 1 (recreational and state level) or level 2 (AFL). A recreational subgroup (n = 19) also performed a treadmill VO2max test.

Results:

Test–retest results found the yo-yo (levels 1 and 2) to be reliable (ICC = .86 to .95). The 20MSR and yo-yo level 1 scores correlated (P < .01) in the recreational (r = .81 to .83) and state-level groups (r = .84 to .86), and 20MSR and yo-yo level 2 scores, in the elite (r = .86) and recreational groups (r = .55 to .57). The VO2max and yo-yo level 1 scores in the recreational group correlated (P < .01, r = .87), but no association was found with yo-yo level 2 (r = .40 to .43, non significant).

Conclusions:

We conclude that level 1 (recreational and state level) and level 2 (elite) yo-yo scores were both strongly associated with 20MSR scores and VO2max (level 1: recreational subjects only). The yo-yo appears to measure aerobic fitness similarly to the 20MSR but may also be used as a field test of the ability to repeat high-intensity efforts.

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Amy Waters, Elissa Phillips, Derek Panchuk and Andrew Dawson

In high performance sport it is common for sport biomechanists to play a role in modifying an athlete’s technique. Sport biomechanists and coaches view sprinting performance through distinct lenses based on their unique experience, they bring a diverse range of knowledge together to improve performance. The purpose of this paper is to establish and compare the experiential knowledge of elite sprint running technique of the two groups. Fifty-six sprint coaches and 12 applied sport biomechanists were surveyed to determine ideas on what ideal sprinting technique looked like and eight coaches and sport biomechanists participated in semi-structured interviews to further explore these ideas. Several themes were supported in the biomechanist and coach responses as well as empirical literature, however there were some differences, including opposing priorities of the arm action and stance phase positioning that were not supported in the literature. These differences revealed areas where the biomechanist can best assist coaches and where coaches can suggest avenues for future research. Working together through the coach-biomechanist relationship that exists in high performance sport can benefit all involved and gaps in knowledge can be overcome to ensure that athletes receive the very best support to improve their performance.