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Reliability and criterion-related validity of the 20-yard shuttle test in competitive junior tennis players.

Eriksson A, Johansson FR, Bäck M - Open Access J Sports Med (2015)

Bottom Line: The time recorded manually was compared to the gold standard of digital timing to evaluate the criterion-related validity.Excellent test-retest reliability was found both within the same day (intraclass correlation coefficient [ICC] 0.95) and between days (ICC 0.91).Furthermore, the results showed excellent inter-rater reliability (ICC 0.99) and criterion-related validity on both test occasions (ICC 0.99).

View Article: PubMed Central - PubMed

Affiliation: Rehab City Östermalm, Primary Health Care, Karolinska Institutet, Stockholm, Sweden.

ABSTRACT

Purpose: This study adds to the previous work in the field of sport-specific fitness testing by evaluating a tennis-specific agility test called "the 20-yard shuttle test". The aim of the study was to evaluate the test-retest reliability, the inter-rater reliability, and the criterion-related validity of the 20-yard shuttle test on competitive junior tennis players.

Participants and methods: Totally, 34 Swedish tennis players (13 girls), mean age 14±1.6 years, participated in the study. To examine test-retest reliability, the subjects performed the 20-yard shuttle test three times on the same day and then the same procedure was repeated after 3 days. To test the inter-rater reliability, the time was measured with a stopwatch simultaneously by two different raters. The time recorded manually was compared to the gold standard of digital timing to evaluate the criterion-related validity.

Results: Excellent test-retest reliability was found both within the same day (intraclass correlation coefficient [ICC] 0.95) and between days (ICC 0.91). Furthermore, the results showed excellent inter-rater reliability (ICC 0.99) and criterion-related validity on both test occasions (ICC 0.99).

Conclusion: We have provided introductory support for the 20-yard shuttle test as a reliable and valid test for use in competitive junior tennis players. The ease of administration makes this test a practical alternative to evaluate physical fitness in order to optimally train the athletes.

No MeSH data available.


Related in: MedlinePlus

Means of measurement of time in trials 1, 2, and 3 (n=34).
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f4-oajsm-6-269: Means of measurement of time in trials 1, 2, and 3 (n=34).

Mentions: Results from the ANOVA with repeated measures showed statistically significant main effects for TYPE (P<0.001) and TRIAL (P=0.001), and there was a significant interaction effect between SESSION and TYPE (P<0.001). The mean score for digital time was higher compared to manual time (P<0.001). Furthermore, post hoc comparisons showed a significant lower mean time for trial 2 vs 1 (P=0.007) and trial 3 vs 1 (P=0.002) for session 1 (Figure 4). The interaction effect between SESSION and TYPE showed a significantly (P<0.001) larger difference between digital and manual time for test session 1 compared to test session 2.


Reliability and criterion-related validity of the 20-yard shuttle test in competitive junior tennis players.

Eriksson A, Johansson FR, Bäck M - Open Access J Sports Med (2015)

Means of measurement of time in trials 1, 2, and 3 (n=34).
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4542558&req=5

f4-oajsm-6-269: Means of measurement of time in trials 1, 2, and 3 (n=34).
Mentions: Results from the ANOVA with repeated measures showed statistically significant main effects for TYPE (P<0.001) and TRIAL (P=0.001), and there was a significant interaction effect between SESSION and TYPE (P<0.001). The mean score for digital time was higher compared to manual time (P<0.001). Furthermore, post hoc comparisons showed a significant lower mean time for trial 2 vs 1 (P=0.007) and trial 3 vs 1 (P=0.002) for session 1 (Figure 4). The interaction effect between SESSION and TYPE showed a significantly (P<0.001) larger difference between digital and manual time for test session 1 compared to test session 2.

Bottom Line: The time recorded manually was compared to the gold standard of digital timing to evaluate the criterion-related validity.Excellent test-retest reliability was found both within the same day (intraclass correlation coefficient [ICC] 0.95) and between days (ICC 0.91).Furthermore, the results showed excellent inter-rater reliability (ICC 0.99) and criterion-related validity on both test occasions (ICC 0.99).

View Article: PubMed Central - PubMed

Affiliation: Rehab City Östermalm, Primary Health Care, Karolinska Institutet, Stockholm, Sweden.

ABSTRACT

Purpose: This study adds to the previous work in the field of sport-specific fitness testing by evaluating a tennis-specific agility test called "the 20-yard shuttle test". The aim of the study was to evaluate the test-retest reliability, the inter-rater reliability, and the criterion-related validity of the 20-yard shuttle test on competitive junior tennis players.

Participants and methods: Totally, 34 Swedish tennis players (13 girls), mean age 14±1.6 years, participated in the study. To examine test-retest reliability, the subjects performed the 20-yard shuttle test three times on the same day and then the same procedure was repeated after 3 days. To test the inter-rater reliability, the time was measured with a stopwatch simultaneously by two different raters. The time recorded manually was compared to the gold standard of digital timing to evaluate the criterion-related validity.

Results: Excellent test-retest reliability was found both within the same day (intraclass correlation coefficient [ICC] 0.95) and between days (ICC 0.91). Furthermore, the results showed excellent inter-rater reliability (ICC 0.99) and criterion-related validity on both test occasions (ICC 0.99).

Conclusion: We have provided introductory support for the 20-yard shuttle test as a reliable and valid test for use in competitive junior tennis players. The ease of administration makes this test a practical alternative to evaluate physical fitness in order to optimally train the athletes.

No MeSH data available.


Related in: MedlinePlus