Impact of acute caffeine ingestion on isometric squat and vertical jump performance

Donahue, Paul T.; Wright, Alexandar; Victory, Jared

doi:10.23736/s0022-4707.21.12808-7

Cited by 2 publications

(4 citation statements)

References 25 publications

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“…Raw vertical ground reaction force data were exported and analyzed using a customized Excel spreadsheet (Microsoft, Redmond, WA). The spreadsheet was modeled using methods previously described and used in prior investigations (3,(5)(6)(7). Phases of CMJ were defined using the methods and terminology presented by McMahon et al (16).…”

Section: Discussionmentioning

confidence: 99%

Examining Countermovement Jump Strategies Between Women's NCAA Division I Sports

Donahue,

Peel,

Rush

et al. 2023

Journal of Strength and Conditioning Research

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Donahue, PT, Peel, SA, Rush, M, McInnis, AK, Littlefield, T, Calci, C, and Brutofsky, T. Examining countermovement jump strategies between women’s NCAA Division I sports. J Strength Cond Res 37(10): 2052–2057, 2023—The purpose of this study was to examine countermovement vertical jump performance among female athletes who rely heavily on vertical jump performance within their given sport. Forty-five female athletes representing 3 teams (basketball, volleyball, and beach volleyball) competing at the NCAA Division I level completed 2 maximal effort countermovement jumps (CMJ) using a portable force platform. A 1-way analysis of variance was used to compare groups across each variable. Statistically significant differences were found between the groups regarding propulsive duration and time to takeoff with basketball showing the shortest time and beach volleyball having the longest times (p < 0.05). In addition, differences were seen in countermovement depth and mean propulsive force between the groups with basketball displaying the smallest countermovement and highest force (p < 0.05). No differences were seen in jump height and reactive strength index modified. Greater force and shorter durations in basketball athletes versus the low force and long durations in the beach volleyball athletes suggest that sporting backgrounds play a large role in how the CMJ is performed. This information can aid strength and conditioning practitioners in the design of training programs that are sport specific to the strategies used by the athlete.

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Section: Discussionmentioning

confidence: 99%

Examining Countermovement Jump Strategies Between Women's NCAA Division I Sports

Donahue,

Peel,

Rush

et al. 2023

Journal of Strength and Conditioning Research

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“…Raw vertical ground reaction force data were then exported and analyzed using a customized spreadsheet (Microsoft Excel, Redmond WA USA). The spreadsheet used was modelled using the equations and phase descriptions provided by Chavda et al (Chavda et al, 2018), and used in previous investigations by the investigators in the current study (Chavda et al, 2018;Donahue, Wright, et al, 2021). Concerning the variables of interest in the present analysis concentric and eccentric phase determination was identified as the point at which the center of mass velocity reached zero (J. J.…”

Section: Discussionmentioning

confidence: 99%

“…Instructions were then given to jump as high as possible. The use of a "3,2,1, Go" countdown was used Donahue, Wright, & Victory, 2021).…”

Section: Jump Testing Protocolmentioning

confidence: 99%

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Positional Comparison of Jump Performance in NCAA Division I Female Volleyball Athletes

Rush¹,

Littlefield²,

McInnis³

et al. 2022

IJKSS

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Background: The vertical jump task is a critical component of success in volleyball. Each position on the court has its own physical demands and has differing levels of vertical jump task demands. Objective: Thus, the objective of this investigation was to compare vertical jump performance between the two positional groups using the countermovement jump (CMJ) and squat jump (SJ). Methods: Using an observational cross-sectional study design, nineteen NCAA Division I female volleyball athletes participated in this investigation. Participants first performed three CMJ trials followed by 3 SJ trials on a force platform. Jump height, peak and mean net propulsive forces, and time to take off were calculated for both the CMJ and SJ. Reactive strength index modified and propulsive duration were additionally calculated for the CMJ and average RFD for the SJ. Independent sample t-tests were performed comparing positional groups on each variable of interest with Hedges g effect sizes additionally calculated. Results: No statistically significant differences (p 0.05) were found between any of the variables of interest in the CMJ though moderate effect sizes were seen in jump height (g =0.78). No statistically significant differences were present in the SJ though moderate effect sizes were seen in RFD (g = 0.65), mean propulsive force (g = 0.79) and peak propulsive force (g = 0.66). Discussion: As the vertical jump task is a critical task for high-level performance in both positions, and the no differences seen between groups, training programs should be designed to improve jump performance with special attention to the individual athletes’ needs rather than the specifics of the playing position.

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Impact of acute caffeine ingestion on isometric squat and vertical jump performance

Cited by 2 publications

References 25 publications

Examining Countermovement Jump Strategies Between Women's NCAA Division I Sports

Examining Countermovement Jump Strategies Between Women's NCAA Division I Sports

Positional Comparison of Jump Performance in NCAA Division I Female Volleyball Athletes

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