Validity and Reliability of an On-Court Fitness Test for Assessing and Monitoring Aerobic Fitness in Squash

Carl James*, Florencio Tenllado Vallejo, Melvin Kantebeen, Saro Farra

*Corresponding author for this work

Research output: Contribution to journalJournal articlepeer-review

6 Citations (Scopus)


James, C, Tenllado Vallejo, F, Kantebeen, M, and Farra, S. Validity and reliability of an on-court fitness test for assessing and monitoring aerobic fitness in squash. J Strength Cond Res 33(5): 1400-1407, 2019 - Current on-court assessments of aerobic fitness in squash are not designed to yield a wealth of physiological data. Moreover, tests may require complex computer equipment or involve simulated racket strokes, which are difficult to standardize at high intensities. This study investigated the validity and reliability of a squash-specific fitness test which can yield both a standalone performance score, as well as pertinent physiological markers such as Vo2max, the lactate turnpoint and oxygen cost, in a sport-specific environment. Eight national squash players completed 3 tests in a counterbalanced order: an incremental laboratory treadmill test (LAB) and 2 on-court fitness tests (STs) that involved repeated shuttle runs at increasing speeds. Vo2max during ST was agreeable with LAB (typical error [TE] = 3.3 ml·kg-1·min-1, r = 0.79). The mean bias between LAB and ST was 2.5 ml·kg-1·min-1. There were no differences in maximum heart rate, postexercise blood lactate concentration, or end of test rating of perceived exertion between LAB and ST (p > 0.05). The ST was highly reliable, with 74 (10) laps completed in ST1 and 75 (12) laps in ST2 (mean bias = 1 lap, TE = 3 laps, r = 0.97). Physiological markers were also reliable, including Vo2max, (TE = 1.5 ml·kg-1·min-1, r = 0.95), the lap number at 4 mMol-1 (TE = 4 laps, r = 0.77), and average Vo2 across the first 4 stages (TE = 0.94 ml·kg-1·min-1, r = 0.95). We observed good agreement between LAB and ST for assessing Vo2max and between both on-court trials for assessing test performance and selected physiological markers. Consequently, we recommend this test for monitoring training adaptations and prescribing individualized training in elite squash players.

Original languageEnglish
Pages (from-to)1400-1407
Number of pages8
JournalJournal of Strength and Conditioning Research
Issue number5
Publication statusPublished - May 2019

Scopus Subject Areas

  • Orthopedics and Sports Medicine
  • Physical Therapy, Sports Therapy and Rehabilitation

User-Defined Keywords

  • fitness testing
  • physiology
  • sport-specific
  • squash training


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