The Effects of Familiarisation on Countermovement Jumps with Handheld Dumbbell Accentuated Eccentric Loading in Youth Athletes

Bright, Thomas E. ORCID: https://orcid.org/0000-0001-8089-817X, Lake, Jason, Handford, Matthew J., Theis, Nicola ORCID: https://orcid.org/0000-0002-0775-1355, Mundy, Peter and Hughes, Jonathan D. ORCID: https://orcid.org/0000-0002-9905-8055 (2025) The Effects of Familiarisation on Countermovement Jumps with Handheld Dumbbell Accentuated Eccentric Loading in Youth Athletes. European Journal of Sport Science, 25 (9). doi:10.1002/ejsc.70033

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Abstract

Highlights Significant differences in normalised force‐time data were observed between three CMJ AEL20 familiarisation sessions, particularly after the dumbbells' release point, indicating a potential learning effect. Propulsion phase variables were reliable from the first session; however, unweighting and braking phase variables showed poor to moderate reliability, suggesting more than three familiarisation sessions are needed for these phases of the CMJ AEL . Braking phase time demonstrated the poorest reliability between‐ and within‐sessions, likely because of inconsistent dumbbell release timing. Future studies should investigate phase‐specific verbal cues to stabilise movement execution and enhance performance during CMJ AEL .

Item Type:	Article
Article Type:	Article
Uncontrolled Keywords:	Eccentric training; Jumping; Learning effect; Long‐term athlete development; Statistical parametric mapping
Subjects:	G Geography. Anthropology. Recreation > GV Recreation Leisure > GV557 Sports Q Science > QP Physiology Q Science > QP Physiology > QP301.H75 Physiology. Sport
Divisions:	Schools and Research Institutes > School of Education, Health and Sciences
Depositing User:	Charlotte Crutchlow
Date Deposited:	19 Aug 2025 14:10
Last Modified:	28 Aug 2025 09:30
URI:	https://eprints.glos.ac.uk/id/eprint/15247

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