An Acute Bout of Barefoot Running Alters Lower-limb Muscle Activation for Minimalist Shoe Users

2016 ◽  
Vol 37 (05) ◽  
pp. 382-387 ◽  
Author(s):  
N. Snow ◽  
F. Basset ◽  
J. Byrne
Keyword(s):  
Lower Limb ◽  
Muscle Activation ◽  
Lower Limb Muscle ◽  
Limb Muscle ◽  
Barefoot Running ◽  
Acute Bout

scholarly journals Effects of Dominant and Nondominant Limb Immobilization on Muscle Activation and Physical Demand during Ambulation with Axillary Crutches

2021 ◽  
Vol 6 (1) ◽  
pp. 16
Author(s):  
Kara B. Bellenfant ◽  
Gracie L. Robbins ◽  
Rebecca R. Rogers ◽  
Thomas J. Kopec ◽  
Christopher G. Ballmann
Keyword(s):  
Lower Limb ◽  
Muscle Activation ◽  
Weight Bearing ◽  
Lower Limbs ◽  
Medial Gastrocnemius ◽  
Bipedal Walking ◽  
Lower Limb Muscle ◽  
Limb Muscle ◽  
Physical Demand ◽  
Limb Dominance

The purpose of this study was to investigate the effects of how limb dominance and joint immobilization alter markers of physical demand and muscle activation during ambulation with axillary crutches. In a crossover, counterbalanced study design, physically active females completed ambulation trials with three conditions: (1) bipedal walking (BW), (2) axillary crutch ambulation with their dominant limb (DOM), and (3) axillary crutch ambulation with their nondominant limb (NDOM). During the axillary crutch ambulation conditions, the non-weight-bearing knee joint was immobilized at a 30-degree flexion angle with a postoperative knee stabilizer. For each trial/condition, participants ambulated at 0.6, 0.8, and 1.0 mph for five minutes at each speed. Heart rate (HR) and rate of perceived exertion (RPE) were monitored throughout. Surface electromyography (sEMG) was used to record muscle activation of the medial gastrocnemius (MG), soleus (SOL), and tibialis anterior (TA) unilaterally on the weight-bearing limb. Biceps brachii (BB) and triceps brachii (TB) sEMG were measured bilaterally. sEMG signals for each immobilization condition were normalized to corresponding values for BW.HR (p < 0.001) and RPE (p < 0.001) were significantly higher for both the DOM and NDOM conditions compared to BW but no differences existed between the DOM and NDOM conditions (p > 0.05). No differences in lower limb muscle activation were noted for any muscles between the DOM and NDOM conditions (p > 0.05). Regardless of condition, BB activation ipsilateral to the ambulating limb was significantly lower during 0.6 mph (p = 0.005) and 0.8 mph (p = 0.016) compared to the same speeds for BB on the contralateral side. Contralateral TB activation was significantly higher during 0.6 mph compared to 0.8 mph (p = 0.009) and 1.0 mph (p = 0.029) irrespective of condition. In conclusion, limb dominance appears to not alter lower limb muscle activation and walking intensity while using axillary crutches. However, upper limb muscle activation was asymmetrical during axillary crutch use and largely dependent on speed. These results suggest that functional asymmetry may exist in upper limbs but not lower limbs during assistive device supported ambulation.

Lower limb muscle activation patterns in ice-hockey skating and associations with skating speed

2021 ◽  
pp. 1-16
Author(s):  
Sami Kaartinen ◽  
Mika Venojärvi ◽  
Kim J Lesch ◽  
Heikki Tikkanen ◽  
Paavo Vartiainen ◽  
...  
Keyword(s):  
Lower Limb ◽  
Muscle Activation ◽  
Ice Hockey ◽  
Lower Limb Muscle ◽  
Limb Muscle ◽  
Activation Patterns ◽  
Muscle Activation Patterns

A comparison of lower limb muscle activation pattern using voluntary response index between pronated and normal foot structures during forward jump landing

2018 ◽  
Vol 22 (2) ◽  
pp. 379-384
Author(s):  
Hosein Kouhzad Mohammadi ◽  
Mohammad Mehravar ◽  
Khosro Khademi Kalantari ◽  
Sedighe Sadat Naimi ◽  
Alireza Akbarzadeh Baghban ◽  
...  
Keyword(s):  
Lower Limb ◽  
Muscle Activation ◽  
Lower Limb Muscle ◽  
Limb Muscle ◽  
Activation Pattern ◽  
Muscle Activation Pattern ◽  
Response Index ◽  
Jump Landing ◽  
Voluntary Response

Comparison of lower limb muscle activation during downhill, level and uphill running

2010 ◽  
Vol 18 (3) ◽  
pp. 163-168 ◽  
Author(s):  
Zong-Yan Cai ◽  
Cheng-Chen Hsu ◽  
Chin-Peng Su ◽  
Chin-Fan Lin ◽  
Yi-An Lin ◽  
...  
Keyword(s):  
Lower Limb ◽  
Muscle Activation ◽  
Lower Limb Muscle ◽  
Limb Muscle
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