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

Jamaludin, Nazatul Izzati; Sahabuddin, Farhah Nadhirah Aiman; Najib, Raja Khairul Mustaqim Raja Ahmad; Bahari, Muhamad Lutfi Hanif Shamshul; Shaharudin, Shazlin

doi:10.3390/ijerph17124418

Cited by 12 publications

(8 citation statements)

References 28 publications

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“…In the literature, gender-specific effects on kinetic, kinematic and motor control strategies during drop jump have been documented [ 15 , 42 , 53 , 54 ]. Recently, these differences have been attributed to a different feedforward control strategy; females show a deficit in the rate tension developed by hip extensors and consequently they have to activate the knee extensor earlier than males to counteract their deficit [ 55 ].…”

Section: Discussionmentioning

confidence: 99%

Neuromuscular Strategies in Stretch–Shortening Exercises with Increasing Drop Heights: The Role of Muscle Coactivation in Leg Stiffness and Power Propulsion

Giminiani

Giovannelli

Capuano

et al. 2020

IJERPH

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When applying drop jump exercises, knowing the magnitude of the stimulus is fundamental to stabilize the leg joints and to generate movements with the highest power. The effects of different drop heights on leg muscles coactivation, leg stiffness and power propulsion were investigated in fifteen sport science students. Drop jumps from heights of 20, 30, 40, 50, and 60 cm in a random order were performed on a force platform. During each drop jump, the ground reaction force, knee angle displacement, and synchronized surface-electromyography root-mean-square (sEMGRMS) activity (vastus lateralis, VL; vastus medialis, VM; rectus femoris, RF; biceps femoris, BF; tibialis anterior, TA and lateral gastrocnemius, LG) were recorded. The coactivation in the pre-contact phase, between VL and BF, VM and BF as well as RF and BF, was dependent on the drop height (p < 0.01; effect size (ES) ranged from 0.45 to 0.90). Leg stiffness was dependent on the drop height (p < 0.001; ES = 0.27–0.28) and was modulated by the coactivation of VM–BF (p = 0.034) and RF–BF (p = 0.046) during the braking phase. Power propulsion was also dependent on the drop height (p < 0.001; ES = 0.34); however, it was primarily modulated by the coactivation of LG–TA during the braking phase (p = 0.002). The coactivation of thigh muscles explains leg stiffness adjustments at different drop heights. On the contrary, the coactivation of shank muscles is mostly responsible for the power propulsion.

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Section: Discussionmentioning

confidence: 99%

Neuromuscular Strategies in Stretch–Shortening Exercises with Increasing Drop Heights: The Role of Muscle Coactivation in Leg Stiffness and Power Propulsion

Giminiani

Giovannelli

Capuano

et al. 2020

IJERPH

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“…One of the main causes of the valgus position of the knee is known to be neuromuscular control deficits and altered muscle co‐activation or recruitment patterns during proximal or distal movement patterns (Jamaludin, Sahabuddin et al., 2020). Impaired neuromuscular control or muscle co‐activation may lead to inadequate knee joint stability and increase the risk of ACL injury (Hewett, Myer et al., 2016).…”

Section: Introductionmentioning

confidence: 99%

Neuromuscular training improves muscle co‐activation and knee kinematics in female athletes with high risk of anterior cruciate ligament injury

Ramezani,

Saki,

Tahayori

2024

European Journal of Sport Science

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Neuromuscular deficits at the proximal or distal to the knee may contribute to knee valgus and anterior cruciate ligament (ACL) injury. A valgus or abducted position of the knee greater than 12° for females is suggested to be an indicator of the risk of lower extremity injuries. However, there is a lack of examination regarding neuromuscular patterns in both proximal and distal kinetic chains. The purpose of this study was to investigate the effect of 8 weeks of neuromuscular training on knee valgus and co‐activation of the hip and ankle muscles during a countermovement jump in female athletes with a high risk of ACL injury. Twenty‐eight female athletes, with knee valgus greater than 12°, were randomly assigned into two groups: training (n = 14) and control (n = 14). The following measurements were taken before and after the intervention: co‐activation of Gluteus Maximus‐Tensor Fasciae Latae (GMax‐TFL), Gluteus Medius‐Adductor Longus (GMed‐AL), Tibialis Anterior‐Medial Gastrocnemius (TA‐MG), Tibialis Anterior‐Lateral Gastrocnemius (TA‐LG), Medial Gastrocnemius‐Lateral Gastrocnemius (MG‐LG) muscles, and DKV angle during single‐leg countermovement jump task. Following the intervention, the training group demonstrated increased co‐activation of muscles (except TA‐LG) (P < 0.05). The knee valgus angle in the training group decreased by 5.9° (P = 0.001). Our results demonstrated that neuromuscular training alters muscle activity patterns and the neuromuscular group demonstrated a clinically meaningful and statistical reduction in knee valgus.

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“… 13–19 These kinetic chain patterns can be identified as the top-down approach (hip and trunk) and the bottom-up approach (ankle). 20 …”

Section: Introductionmentioning

confidence: 99%

Effect of Sex and Lateral Ankle Sprain History on Dorsiflexion Range Of Motion Asymmetry During the Weight Bearing Lunge Test

Cady,

De Ste Croix,

Deighan

2024

International Journal of Sports Physical Therapy

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Background Reduced dorsiflexion range of motion (DFROM) which is commonly seen following lateral ankle sprain (LAS) has the potential to influence lower extremity biomechanics which have been linked to increased injury risk in the female athlete. Current research on the effect of sex and LAS history on DFROM is limited. Hypothesis/Purpose This study had three aims 1) to determine the effect of sex, leg dominance and LAS history on DFROM, 2) to determine the effect of sex and LAS history on magnitude of DFROM symmetry and 3) to examine the association of sex on direction (whether dominant or non-dominant limb had the higher DFROM) of symmetry. Study Design Cross-Sectional Study Methods DFROM was measured bilaterally in 105 recreational athletes all participating in multidirectional sports using the tape measurement method during the weight bearing lunge test (WBLT). A mean of three measurements was used for analysis. A 3-way mixed ANOVA was carried out to determine the interaction between sex, LAS history and leg dominance on DFROM and a 2-way ANOVA for the effect of sex and LAS history on asymmetry. A chi-square test was used to determine the association of sex and direction of asymmetry. Results The results indicate no significant effect of sex, LAS history, and leg dominance on DFROM (p=0.65). Main effects were significant for sex and LAS on DFROM. The mean asymmetry for all participants was reported as 12.25±14.76cm. No significant effect of sex and LAS history on magnitude of asymmetry was reported. There was a significant association of sex and direction of asymmetry (χ2(1) = 11.26, p = 0.00). Sixty-five-point two percent of males were shown to have higher DFROM of their non-dominant limb compared to 75% of females who were higher in their dominant limb. Conclusion Findings from this study suggest that DFROM is affected by sex and LAS history. While females have increased DFROM compared to males, those with LAS history are more likely to have a decreased DFROM on the involved side. The results also indicate that interlimb asymmetries in DFROM are present in athletes, therefore practitioners should exercise caution when using bilateral comparisons in injury and return to play assessments. Level of Evidence 2b.

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

Cited by 12 publications

References 28 publications

Neuromuscular Strategies in Stretch–Shortening Exercises with Increasing Drop Heights: The Role of Muscle Coactivation in Leg Stiffness and Power Propulsion

Neuromuscular Strategies in Stretch–Shortening Exercises with Increasing Drop Heights: The Role of Muscle Coactivation in Leg Stiffness and Power Propulsion

Neuromuscular training improves muscle co‐activation and knee kinematics in female athletes with high risk of anterior cruciate ligament injury

Effect of Sex and Lateral Ankle Sprain History on Dorsiflexion Range Of Motion Asymmetry During the Weight Bearing Lunge Test

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