Elevated gastrocnemius forces compensate for decreased hamstrings forces during the weight-acceptance phase of single-leg jump landing: implications for anterior cruciate ligament injury risk

Morgan, Kristin D.; Donnelly, Cyril J.; Reinbolt, Jeffrey A.

doi:10.1016/j.jbiomech.2014.08.016

Cited by 92 publications

(80 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In vitro studies indicate the Gastrocnemii muscles to act as antagonist to the ACL, as Gastrocnemii force causes Posterior Femoral Translation (PFT) relative to the tibia and hence strain the ACL (Fleming et al, 2001;Elias et al, 2003). Conversely, in vivo studies suggested increased Gastrocnemius forces to compensate for decreased hamstrings forces during the weight-acceptance phase of single leg jump landing (Morgan et al, 2014), indicating a compensatory or agonist function to the ACL, similar to findings and hypothesis of the current study. Still, the effect of the Gastrocnemii on the PFT is questioned, as a low moment of force of the Gastrocnemii was found at peak ground reaction force during single leg jump landing in male adults (Podraza and White, 2010;Mokhtarzadeh et al, 2013).…”

Section: Discussionsupporting

confidence: 84%

“…Given, that in the functional task studied it was not possible to fix the ankle/hip joint of the bi-articular muscles and isolate the effect to be mono-articular, both muscle groups were included for the CCI calculation, as similar to other studies of knee muscle co-activation (Masci et al, 2010;Podraza and White, 2010;Morgan et al, 2014). It is a weakness of the current study, that the bi-articular Rectus Femoris muscle is not measured, which was due to limitations of the available EMG channels.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Altered knee joint neuromuscular control during landing from a jump in 10–15year old children with Generalised Joint Hypermobility. A substudy of the CHAMPS-study Denmark

Junge

Wedderkopp

Thorlund

et al. 2015

Journal of Electromyography and Kinesiology

View full text Add to dashboard Cite

Generalised Joint Hypermobility (GJH) is considered an intrinsic risk factor for knee injuries. Knee neuromuscular control during landing may be altered in GJH due to reduced passive stability. The aim was to identify differences in knee neuromuscular control during landing of the Single-Leg-Hop-for-Distance test (SLHD) in 25 children with GJH compared to 29 children without GJH (controls), all 10-15years. Inclusion criteria for GJH: Beighton score⩾5/9 and minimum one hypermobile knee. EMG was recorded from the quadriceps, the hamstring and the calf muscles, presented relative to Maximum Voluntary Electrical activity (MVE). There was no difference in jump length between groups. Before landing, GJH had 33% lower Semitendinosus, but 32% higher Gastrocnemius Medialis activity and 39% higher co contraction of the lateral knee muscles, than controls. After landing, GJH had 36% lower Semitendinosus activity than controls, all significant findings. Although the groups performed equally in SLHD, GJH had a Gastrocnemius Medialis dominated neuromuscular strategy before landing, plausibly caused by reduced Semitendinosus activity. Reduced Semitendinosus activity was seen in GJH after landing, but with no compensatory Gastrocnemius Medialis activity. Reduced pre and post-activation of the Semitendinosus may present a risk factor for traumatic knee injuries as ACL ruptures in GJH with knee hypermobility.

show abstract

Section: Discussionsupporting

confidence: 84%

Section: Discussionmentioning

confidence: 99%

Altered knee joint neuromuscular control during landing from a jump in 10–15year old children with Generalised Joint Hypermobility. A substudy of the CHAMPS-study Denmark

Junge

Wedderkopp

Thorlund

et al. 2015

Journal of Electromyography and Kinesiology

View full text Add to dashboard Cite

show abstract

“…Additionally, the increases of the hip flexion and ankle plantar flexion joint moments with effect sizes above 0.6 show that the patients were better able to push off the injured limb without increasing the load at the knee joint. A possible mechanism therefore could be that the RegentK treatment improved the gastrocnemius activation, which could also be a general muscle strategy to stabilize the injured knee joint [38]. This concurs with the current literature observing immediate effects of manual therapy already after a single treatment, suggesting that the underlying mechanism is composed of fast response processes rather than complex metabolic phenomena.…”

Section: Discussionsupporting

confidence: 88%

RegentK Improves the Gait Mechanics of Patients with Acute Anterior Cruciate Ligament Rupture Immediately after Application: Clinical Trial

et al. 2017

View full text Add to dashboard Cite

Background: The purpose of this study was to investigate the immediate response to RegentK (Regeneration-Therapy by Khalifa) of patients with an acute rupture of the anterior cruciate ligament (ACL), regarding the gait mechanics and functional tests, in comparison to norm data. Patients and Methods: 9 male patients with an acute unilateral ACL rupture underwent an orthopedic exam and gait analysis immediately before and after the 1-h RegentK treatment; the results were compared to norm data of 10 healthy participants matched with the RegentK group for age and body mass index. An infrared camera system collected kinematic gait data on the injured limb; the gait kinetics were recorded with 2 force plates. Results: Immediately after the treatment, significant improvements with regard to limping, the quadriceps knee force, and the passive knee range of motion (ROM) occurred. The gait characteristics showed a significantly increased gait velocity (+0.17 m/s), step frequency (+8 steps/min), and injured-limb step length (+5 cm). The faster gait velocity involved increased sagittal ankle and hip ROM, increased maximal vertical ground reaction forces, internal ankle plantar flexion and hip flexion moments. Conclusions: RegentK seems to immediately affect functional parameters such as passive knee joint motion and quadriceps strength and seems to enable patients to walk more dynamically, generally expressed through an increased walking speed.

show abstract

“…It has the advantage that it is simple and reliable although its credibility as an ACL-injuring manoeuvre has been questioned [76]. Furthermore, the DVJ does not replicate sport specific landings, which are commonly only supported on one leg [76,77]. The use of a more sport-specific movement as a measurement tool may produce more sensitive and specific ACL injury predictors.…”

Section: Extrapolation and Standardizationmentioning

confidence: 99%

Mapping current research trends on anterior cruciate ligament injury risk against the existing evidence: In vivo biomechanical risk factors

Sharir

Rafeeuddin

Staes

et al. 2016

Clinical Biomechanics

View full text Add to dashboard Cite

Background: Whilst many studies measure large numbers of biomechanical parameters and associate these to anterior cruciate ligament injury risk, they cannot be considered as anterior cruciate ligament injury risk factors without evidence from prospective studies. A review was conducted to systematically assess the in vivo biomechanical literature to identify biomechanical risk factors for non-contact anterior cruciate ligament injury during dynamic sports tasks; and to critically evaluate the research trends from retrospective and associative studies investigating non-contact anterior cruciate ligament injury risk. Methods: An electronic literature search was undertaken on studies examining in vivo biomechanical risk factors associated with non-contact anterior cruciate ligament injury. The relevant studies were assessed by classification; level 1 -a prospective cohort study, level 2 -a retrospective study or level 3 -an associative study. Findings: An initial search revealed 812 studies but this was reduced to 1 level 1 evidence study, 20 level 2 evidence studies and 175 level 3 evidence studies that met all inclusion criteria. Level 1 evidence showed that the knee abduction angle, knee abduction moment and ground reaction force were biomechanical risk factors. Nine level 2 studies and eightythree level 3 studies used these to assess risk factors in their study. Inconsistencies in results and methods were observed in level 2 and 3 studies. Interpretation: There is a lack of high quality, prospective level 1 evidence related to biomechanical risk factors for non-contact anterior cruciate ligament injury. More prospective cohort studies are required to determine risk factors and provide improved prognostic capability.

show abstract

Elevated gastrocnemius forces compensate for decreased hamstrings forces during the weight-acceptance phase of single-leg jump landing: implications for anterior cruciate ligament injury risk

Cited by 92 publications

References 49 publications

Altered knee joint neuromuscular control during landing from a jump in 10–15year old children with Generalised Joint Hypermobility. A substudy of the CHAMPS-study Denmark

Altered knee joint neuromuscular control during landing from a jump in 10–15year old children with Generalised Joint Hypermobility. A substudy of the CHAMPS-study Denmark

RegentK Improves the Gait Mechanics of Patients with Acute Anterior Cruciate Ligament Rupture Immediately after Application: Clinical Trial

Mapping current research trends on anterior cruciate ligament injury risk against the existing evidence: In vivo biomechanical risk factors

Contact Info

Product

Resources

About