Optimal depth jump height quantified as percentage of athlete stature

Tomasevicz, Curtis L.; Hasenkamp, Ryan M.; Ransone, Jack; Jones, David C.

doi:10.14198/jhse.2020.153.17

Cited by 3 publications

(5 citation statements)

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“…From this height, an athlete can utilize the stretch-shortening cycle more efficiently than DJs from lower heights. DJs from greater heights inflict too great of an impact force for the athlete to overcome and results in a lower power output (Tomasevicz et al, 2019). This aligns with other investigations that seek optimal DJ heights based on fixed drop heights independent of athlete stature (20 -40 cm) (A.…”

Section: Depth Jumpsupporting

confidence: 85%

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Risk of injury analysis in depth jump and squat jump

Tomasevicz¹,

Woldstad²,

Jones³

2021

jhse

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Introduction: The depth jump (DJ) and squat jump (SJ) are accepted ways to assess and train power producing ability but are not without risk of injury. Methods: Sixteen male participants (age = 21.7 ± 1.54 yrs., height = 177.7 ± 11.4 cm, mass = 77.7 ± 13.6 kg) were evaluated for power exertion capabilities while being assessed for risk of injury in the knee and low back through a range of resistances based on a percentage of participants' heights in the DJ (0% through 50%) and bodyweights for the SJ (0% through 100%). Two variables were used to assess the risk of injury in the knee: valgus angle and internal abduction moment (IAM). Four variables were used in the low back: compression and shear force at the L5/S1 vertebrae, intraabdominal pressure (IAP), and erector muscle tension. Results: With increasing DJ drop height, participants showed increased risk of injury in the knee through the valgus angle and IAM. In the low back, significant correlation occurred between increasing drop height and the shear force and IAP while compression force and erector muscle tension were more correlated with the power exertion of the participants than the drop height. With increasing SJ resistance, no significant increased risk of knee injury was detected. However, all low back variables except the IAP were significantly influenced by the increased resistance. Conclusion: Risk of injury in the knee and low back can be strongly dependent not only on the type of jump, but also the amount of resistance. The resulting power exerted by the athlete can also influence the risk of injury.

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Section: Depth Jumpsupporting

confidence: 85%

“…At the optimal 20% level, the average normalized peak power output for the group was 66.9 W/kg (± 16.9). All other level resulted in lower power production (Tomasevicz et al, 2019). This is shown in the background of each variable plot in Figure 2.…”

Section: Depth Jumpmentioning

confidence: 77%

Risk of injury analysis in depth jump and squat jump

Tomasevicz¹,

Woldstad²,

Jones³

2021

jhse

Self Cite

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“…The DJ is also debatable as some studies using the test output the Reactive Strength Index (RSI), which is a measure of reactive jump capacity and displays how an athlete copes with and performs plyometric activities [22]. This experiment was based on the so-called drop jump, where the emphasis is placed on a short ground-contact time, less than 0.25 s [17,[22][23][24] and with low magnitudes of leg flexion [25]. In a DJ, resistance is added to the counter-movement phase by stepping off, falling, and landing on the ground from a box or platform between 20 and 60 cm [17,25].…”

Section: Introductionmentioning

confidence: 99%

“…This experiment was based on the so-called drop jump, where the emphasis is placed on a short ground-contact time, less than 0.25 s [17,[22][23][24] and with low magnitudes of leg flexion [25]. In a DJ, resistance is added to the counter-movement phase by stepping off, falling, and landing on the ground from a box or platform between 20 and 60 cm [17,25]. Additionally, the target outcome of this exercise is the development of fast SSC from the muscle-tendon units of the lower extremity extensors.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Height on Drop Jumps in Relation to Somatic Parameters and Landing Kinetics

Maćkała

Rauter

Šimenko

et al. 2020

IJERPH

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The aim of this study was to assess the effect of drop height and selected somatic parameters on the landing kinetics of rebound jumps in force and power production, performed by male and female student athletes. Twenty female and forty male students with a sports background participated in the experiment (mean and standard deviation (± SD): age 20.28 ± 1.31 years, height 166.78 ± 5.29 cm, mass 62.23 ± 7.21 kg and 21.18 ± 1.29, 182.18 ± 6.43, 78.65 ± 7.09). Each participant performed three maximal jumps on two independent and synchronized force platforms (Bilateral Tensiometric Platform S2P) at each of the two assigned drop-jump heights (20-, and 40-, cm for female and 30-, and 60-, cm for the male special platform). Significant between-sex differences were observed in all variables of selected somatics, with men outperforming women. Statistically significant differences were noted in four parameters, between men and women, in both DJs from 20/40 and 30/60 cm. The height of the jump was 6 cm and 4 cm higher for men. A slightly higher statistical significance (p = 0.011) was demonstrated by the relative strength (% BW) generated by the left limb in both men and women. Only women showed a significant relationship between body mass, body height, and five parameters, dropping off of a 20 cm box. In men, only the left leg—relative maximal F (p =−0.45)—showed a relationship with body mass. There were no relationships between the above-mentioned dependencies in both groups, in jumps from a higher height: 40 cm and 60 cm. From a practical application, the DJ with lower 20/30 cm or higher 40/60 cm (women/men) respectively emphasizes either the force or power output via an increase in the velocity component of the rebound action or increased height of the DJ jump.

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“…The countermovement depth: The protocols describe that the jump initiates with the participants in an upright position before executing the vertical jump, which starts with a countermovement until the legs are bent down to 90° [ 58 ]. Despite this, a protocol wherein a self-selected knee angle is used may present higher reliability, and a short test duration should potentially minimize errors [ 37 , 56 , 57 , 59 , 60 , 61 , 62 , 63 , 64 , 65 ];…”

Section: Introductionmentioning

confidence: 99%

Trends Assessing Neuromuscular Fatigue in Team Sports: A Narrative Review

Alba-Jiménez

Moreno-Doutres²,

Peña

2022

Sports

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Neuromuscular fatigue is defined as a reduction induced by exercise in the maximal voluntary force that a muscle or group of muscles can generate. An accumulation of work or an incomplete force restoration can significantly influence the neuromuscular performance in both the short and long terms. Thus, fatigue management is essential for controlling the training adaptations of athletes and reducing their susceptibility to injury and illness. The main individualized monitoring tools used to describe fatigue are questionnaires and subjective assessments of fatigue, biochemical markers, sprint tests, and vertical jump tests. Among the subjective measures, the rating of the perceived exertion has been widely used because of its simplicity and high validity. In terms of the objective measures, one of the more frequently employed tools by practitioners to assess neuromuscular fatigue is the countermovement jump. Because of its high validity and reliability, it is accepted as the reference standard test in sports, in general, and particularly in team sports. Our review aims to clarify how all these indicators, as well as several devices, can help coaches in different sports contexts to monitor neuromuscular fatigue, and how these procedures should be used to obtain data that can be used to make decisions in complex environments.

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Optimal depth jump height quantified as percentage of athlete stature

Cited by 3 publications

References 0 publications

Risk of injury analysis in depth jump and squat jump

Risk of injury analysis in depth jump and squat jump

The Effect of Height on Drop Jumps in Relation to Somatic Parameters and Landing Kinetics

Trends Assessing Neuromuscular Fatigue in Team Sports: A Narrative Review

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