A comparison of muscular activation patterns during running and landing

Savage, Trevor N.; Pagani, C. Fantini; Potthast, Wolfgang; Briiggemann, G.

doi:10.1016/j.jsams.2009.10.397

Cited by 1 publication

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The derived co-activation ratio was based on a combination of various co-activation methods used in previous literature (9,40,66,70,80), and calculated for each time point between 60ms before landing to PKF. For muscle co-activation ratios that only describe the simultaneous activation of multiple muscle groups, equal activation of these muscle groups can be achieved at different magnitudes of activity.…”

Section: Muscle Activation and Co-activationmentioning

confidence: 99%

Adjustments with running speed reveal neuromuscular adaptations during landing associated with high mileage running training

Verheul

Clansey

Lake

2017

Journal of Applied Physiology

View full text Add to dashboard Cite

It remains to be determined whether running training influences the amplitude of lower limb muscle activations prior to and during the first half of stance, and whether such changes are associated with joint stiffness regulation and usage of stored energy from tendons. Therefore, the aim of this study was to investigate neuromuscular and movement adaptations before and during landing in response to running training across a range of speeds. Two groups of high mileage (HM; >45 km/wk, n=13) and low mileage (LM; <15 km/wk, n=13) runners ran at four speeds (2.5-5.5 m•s -1 ) while lower limb mechanics and electromyography of the thigh muscles were collected.There were few differences in pre-landing activation levels, but HM runners displayed lower activations of the Rectus Femoris, Vastus Medialis and Semitendinosus muscles post-landing, and these differences increased with running speed. HM runners also demonstrated higher initial knee stiffness during the impact phase compared to LM runners which was associated with an earlier peak knee flexion velocity, and both were relatively unchanged by running speed. In contrast, LM runners had higher knee stiffness during the slightly later weight acceptance phase and the disparity was amplified with increases in speed. It was concluded that initial knee joint stiffness might predominantly be governed by tendon stiffness rather than muscular activations before landing. Estimated elastic work about the ankle was found to be higher in the HM runners which might play a role in reducing weight acceptance phase muscle activation levels and improve muscle activation efficiency with running training. Key wordsKnee stiffness, Electromyography, Lower limb kinematics, Co-activation, Energy return New and noteworthyAlthough neuromuscular factors play a key role during running, the influence of high mileage training on neuromuscular function has been poorly studied, especially in relation to running speed. This study is the first to demonstrate changes in neuromuscular conditioning with high mileage training, mainly characterised by lower thigh muscle activation after touch-down, higher initial knee stiffness and greater estimates of energy return, with adaptations being increasingly evident at faster running speeds.

show abstract

Section: Muscle Activation and Co-activationmentioning

confidence: 99%