Propulsion Phase Characteristics of Loaded Jump Variations in Resistance-Trained Women

Suchomel, Timothy J.; McKeever, Shana M.; Sijuwade, Olusegun; Carpenter, Logan

doi:10.3390/sports11020044

Cited by 2 publications

(2 citation statements)

References 35 publications

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“…After arriving at the laboratory, each participant completed the informed consent procedures before their age, body mass, height, and estimated 1RM back squat data were collected. Participants then performed a standardized warmup that included three minutes of light-moderate stationary cycling and dynamic stretching (Suchomel et al, 2019a(Suchomel et al, , 2023. After the general warm-up, participants began a specific back squat warm-up protocol that consisted of self-selected repetitions with an empty barbell and five repetitions at 30%, five repetitions at 50%, three repetitions at 70%, and one repetition at 90% of their estimated 1RM (Suchomel et al, 2016).…”

Section: Methodsmentioning

confidence: 99%

Braking and Propulsion Phase Characteristics of Traditional and Accentuated Eccentric Loaded Back Squats

Suchomel,

Cantwell,

Campbell

et al. 2024

Journal of Human Kinetics

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The purpose of this study was to examine the differences in braking and propulsion force-time characteristics and barbell velocity between traditional (TRAD) and accentuated eccentric loaded (AEL) back squats using various load combinations. Sixteen resistance-trained men participated in four separate testing sessions which included a one repetition maximum (1RM) back squat during the first session and three squat testing sessions. During the squat testing sessions, participants either performed sets of three repetitions of TRAD back squats each with 50, 60, 70, and 80% 1RM or performed the same loads with the addition of weight releasers that increased the total eccentric weight of the first repetition of each set to either 100 (AEL-MAX) or 110% 1RM (AEL-SUPRA). Braking and propulsion mean force, duration, and impulse as well as mean and peak barbell velocity were compared between each condition and load. Significantly greater braking impulses were produced during the AEL-MAX and AEL-SUPRA conditions compared to TRAD (p < 0.03) with small-moderate effect sizes favoring AEL-SUPRA. No other significant differences existed among conditions for other braking, propulsion, or barbell velocity variables. AEL-MAX and AEL-SUPRA back squats may provide a greater braking stimulus compared to TRAD squats; however, the propulsion phase of the movement does not appear to be impacted. From a loading standpoint, larger and smaller load spreads may favor rapid and maximal force production characteristics, respectively. Further research on this topic is needed as a large portion of the braking stimulus experienced during AEL back squats may be influenced by relative strength.

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Section: Methodsmentioning

confidence: 99%

Braking and Propulsion Phase Characteristics of Traditional and Accentuated Eccentric Loaded Back Squats

Suchomel,

Cantwell,

Campbell

et al. 2024

Journal of Human Kinetics

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“…So complete integrity is available while extracting kinetic information from this curve, and all these variables are interdependent in different phases. However, no distinct research has been found on the relationship between jump and landing variables in another stage as well as the relationship between impulse variables with each of these parameters, and most studies in this criterion focused on the amount of impulse produced during landing and its effect on jump performance [ 19 – 23 ].…”

Section: Introductionmentioning

confidence: 99%

Relationship between impulse and kinetic variables during jumping and landing in volleyball players

Molla

Fatahi

Khezri³

et al. 2023

BMC Musculoskelet Disord

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Background This study examined the relationships between impulse and kinetic variables during jumping and landing in elite young male volleyball players. Methodology Eighteen players were recruited and asked to jump on a force plate, which allowed for the direct extraction of jump and landing kinetic data. The data was then analysed using stepwise regression to explore the relationship between landing impulse and various kinetic variables. Results Our findings revealed a significant positive relationship between the peak rate of force development concentric (PRFD CON) and impulse at landing (β = 0.537, p = 0.02). In a secondary analysis, we found that PRFD CON (β = 0.497, p = 0.01) and time to peak power concentric (TPPC) (β = 0.424, p = 0.04) were also positively correlated with landing impulse. Importantly, PRFD CON and TPPC were the variables that had the most muscular predictive power for impulse at landing. Conclusion These findings offer crucial insights into the biomechanics of jumping and landing in elite young male volleyball players, informing the development of more effective training programs. Our study identifies PRFD CON and TPPC as critical factors for improving landing impulse, emphasizing the need to consider multiple kinetic variables when designing training programs for explosive skills. These insights can help optimize performance and reduce the risk of injury in elite young male volleyball players.

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Propulsion Phase Characteristics of Loaded Jump Variations in Resistance-Trained Women

Cited by 2 publications

References 35 publications

Braking and Propulsion Phase Characteristics of Traditional and Accentuated Eccentric Loaded Back Squats

Braking and Propulsion Phase Characteristics of Traditional and Accentuated Eccentric Loaded Back Squats

Relationship between impulse and kinetic variables during jumping and landing in volleyball players

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