Reliability and Magnitude of Countermovement Jump Performance Variables: Influence of the Take-Off Threshold

Autor/inn/en	Pérez-Castilla, Alejandro; Fernandes, John F. T.; Rojas, F. Javier; García-Ramos, Amador
Titel	Reliability and Magnitude of Countermovement Jump Performance Variables: Influence of the Take-Off Threshold
Quelle	In: Measurement in Physical Education and Exercise Science, 25 (2021) 3, S.227-235 (9 Seiten) PDF als Volltext Verfügbarkeit
Zusatzinformation	ORCID (Pérez-Castilla, Alejandro) ORCID (García-Ramos, Amador)
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	1091-367X
DOI	10.1080/1091367X.2021.1872578
Schlagwörter	Physical Activities; Performance Tests; Reliability; College Students; Predictor Variables + Suchen Sie Ihr Suchwort? Leistungsbeurteilung; Leistungsermittlung; Leistungsmessung; Leistungsüberprüfung; Reliabilität; Collegestudent; Prädiktor
Abstract	This study explored the influence of different take-off thresholds on the reliability and magnitude of countermovement jump (CMJ) performance variables. Twenty-three men were tested on two separate sessions. CMJ performance variables were obtained against three external loads (0.5-30-60 kg) using three take-off thresholds: 10 N (arbitrary value of 10 N), 5SD (mean value plus 5 standard deviations of the vertical force recorded during the flight phase), and PRF (peak difference between the vertical force trace and 0 N during the flight phase). No significant differences in reliability were observed between the three thresholds (CV and ICC values of one threshold were within 95% CI of the other thresholds). The magnitude of the variables generally differed between the 10 N threshold and the 5SD and PRF thresholds (P < 0.05), but not between the 5SD and PRF thresholds (P > 0.05). These results demonstrate that the take-off threshold influences the magnitude of CMJ performance variables but not their reliability. (As Provided).
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Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2024/1/01