Comparison of lower limb stiffness between male and female dancers and athletes during drop jump landings

Ward, Rachel; Yan, Alycia Fong; Orishimo, Karl F.; Kremenic, Ian J.; Hagins, Marshall; Liederbach, Marijeanne; Hiller, Claire E.; Pappas, Evangelos

doi:10.1111/sms.13309

Cited by 17 publications

(19 citation statements)

References 36 publications

(87 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Drop jump depth was designated as the smallest negative vertical center of mass displacement after first landing. Leg stiffness was determined by a spring-mass model (Ward et al, 2019) and was calculated using the following formula: Stiffness = GRFmax Depth Force, impulse, power, and stiffness were normalized to body mass.…”

Section: 𝑃 = 𝑊 − 𝑊 δ𝑡mentioning

confidence: 99%

Effects of Leg Stiffness Regulated by Different Landing Styles on Vertical Drop Jump Performance

You¹,

Huang²

2022

Journal of Human Kinetics

View full text Add to dashboard Cite

The purpose of this study was to investigate the effects of stiffness regulated by landing styles on drop jump performance. Twenty-four male lacrosse athletes performed drop jumps with stiff (ST), self-selected (SS), and soft (SF) landing from a 0.42 m box. Leg stiffness, ground contact time, depth, jump height, maximum ground reaction force (GRF), GRF at the start of the propulsive phase, mean power, peak power, and the reactive strength index (RSI) were calculated. The results showed that jump height and the RSI had strong correlations to power production in all drop jump styles. Power would be a key factor to overall athletic performance. Repeated measures ANOVA showed significant differences (p < 0.05) in all variables among the three styles. Drop jumps with SS landing had comparable jump height to drop jumps with SF landing and power output to drop jumps with ST landing. Drop jumps with ST landing had significantly lower jump height, but higher GRF, power, and the RSI compared to drop jumps with SF landing. In drop jump testing, drop jumps with SS landing should be used if power and jump height were the major concerns; if the RSI was the major concern, drop jumps with ST landing should be used. Training with drop jumps, one of the main objectives should be increasing power output due to its significant correlation to jump height and the RSI in all conditions.

show abstract

Section: 𝑃 = 𝑊 − 𝑊 δ𝑡mentioning

confidence: 99%

Effects of Leg Stiffness Regulated by Different Landing Styles on Vertical Drop Jump Performance

You¹,

Huang²

2022

Journal of Human Kinetics

View full text Add to dashboard Cite

show abstract

“…Males had greater vertical leg stiffness compared to females, which occurred with a lower center of mass (COM) vertical displacement per height and greater peak GRF per body weight [26]. A previous study showed that males had greater ankle joint stiffness, a lower initial plantar flexion angle, lower ankle ROM, and greater changes and peaks in ankle moment compared to females [26]. Ankle joint stiffness was thought to be due to a reduced ankle joint ROM during landing.…”

Section: Discussionmentioning

confidence: 99%

Bottom-Up Kinetic Chain in Drop Landing among University Athletes with Normal Dynamic Knee Valgus

Jamaludin

Sahabuddin

Najib

et al. 2020

IJERPH

View full text Add to dashboard Cite

The study investigated the influence of ankle strength and its range of motion (ROM) on knee kinematics during drop landing. Fifteen male and fifteen female university athletes with a normal range of dynamic knee valgus (DKV) (knee frontal plane projection angle: men = 3° to 8°, females = 7° to 13°) were recruited. They performed drop landing at height 30 cm and 45 cm with three-dimensional motion capture and analysis. Knee angles were compared at specific landing phases. Isokinetic ankle strength was tested at 60°/s angular velocity while the weight-bearing lunge test was conducted to evaluate ankle ROM. For males, strength for both plantarflexors and dorsiflexors were associated with knee kinematics at both heights (30 cm: r = −0.50, p = 0.03; 45 cm: r = −0.45, p = 0.05) during maximum vertical ground reaction force (MVGRF) phase. For females, ankle invertor strength and knee kinematics were associated at both 30cm (r = 0.53; p = 0.02,) and 45 cm landing heights (r = 0.49, p = 0.03), while plantarflexor strength and knee kinematics showed a significant association during initial contact (r = 0.70, p < 0.01) and MVGRF (r = 0.55, p = 0.02) phases at height 30 cm only. Male and female athletes with normal range of DKV showed a significant relationship between ankle strength and knee kinematics at specific landing phases. These relationships varied with increased landing height.

show abstract

“…In this series, 4 dancers had ACL injuries, all of which had occurred during the landing sequence after leaping. For a secure landing, the knee ought to be in a flexion and varus position; landing while the knee is in an extension and valgus position is a risk factor for an ACL injury [9,16,[24][25][26]. Four of the dancers had ACL tears; all of them were Caucasian dancers.…”

Section: Meniscal Tearsmentioning

confidence: 99%

Traumatic knee injury patterns in Anatolian folk dancers: a case series and literature review

Aksu¹,

Akgonul²,

Aksu³

et al. 2019

Int J Occup Med Environ Health

View full text Add to dashboard Cite

Lower extremities, especially the knee region, are susceptible to traumatic injuries because of long-lasting hard landings and impacts. Most of the injuries described in the literature are associated with ballet. In this review study, the authors tried to present the traumatic knee injury patterns of the Anatolian folk dance. The Fire of Anatolia dance group consists of 82 dancers (37 males [45.1%] and 45 females [54.9%]) with the mean age of 27.96 (SD = 5.05) years (range: 18-38 years). The major folk dances of the region are Zeybek, Halay, Horon, Teke, Roman, Karsilama, Bar and Lezginka ("the Caucasian"). The dancers suffered from 9 orthopedic injuries requiring surgical treatment (3 meniscus tears, 4 anterior cruciate ligament tears, 1 posterior cruciate ligament tear, 1 patellar dislocation) during a 10-year period. The authors investigated solely the traumatic injuries of these folk dance styles and aimed at revealing the traumatic knee injury patterns in this case series and literature review. On the one hand, the Anatolian folk dancers experienced meniscus tears following frequent squats and twists on single leg stances, typical of Horon and Zeybek. On the other hand, anterior cruciate tears happened after jumps and landings in the Caucasian (Lezginka jump) dance. A posterior cruciate ligament tear was also seen after the Caucasian dance landing. The split figure in the Karsilama dance ended up with patellar dislocation. Certain dance figures seem to be related to specific types of injuries.

show abstract

Comparison of lower limb stiffness between male and female dancers and athletes during drop jump landings

Cited by 17 publications

References 36 publications

Effects of Leg Stiffness Regulated by Different Landing Styles on Vertical Drop Jump Performance

Effects of Leg Stiffness Regulated by Different Landing Styles on Vertical Drop Jump Performance

Bottom-Up Kinetic Chain in Drop Landing among University Athletes with Normal Dynamic Knee Valgus

Traumatic knee injury patterns in Anatolian folk dancers: a case series and literature review

Contact Info

Product

Resources

About