Six methods for classifying lower‐limb dominance are not associated with asymmetries during a change of direction task

2021 ◽  
Author(s):  
Ciarán McFadden ◽  
Katherine A. J. Daniels ◽  
Siobhán Strike
Keyword(s):  
Lower Limb ◽  
Change Of Direction ◽  
Limb Dominance

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.

scholarly journals The relationship between lower limb maximal and explosive strength and change of direction ability: Comparison of basketball and tennis players, and long-distance runners

PLoS ONE ◽  
2021 ◽  
Vol 16 (8) ◽  
pp. e0256347
Author(s):  
Žiga Kozinc ◽  
Darjan Smajla ◽  
Nejc Šarabon
Keyword(s):  
Muscle Strength ◽  
Lower Limb ◽  
Trunk Muscles ◽  
Distance Runners ◽  
Long Distance ◽  
Basketball Players ◽  
Tennis Players ◽  
Change Of Direction ◽  
Explosive Strength ◽  
The Relationship

Change-of-direction (CoD) ability is an important determinant of athletic performance. Muscle strength is among the most important determinants of CoD ability. However, previous studies investigating the relationship between CoD ability and muscle strength focused mostly on flexor and extensor muscle groups, or used multi-joint exercises, such as jumps, squats or mid-thigh pull. The purpose of the present study was to investigate the relationship between CoD ability and strength of ankle, knee, hip and trunk maximal and explosive strength. The participants (n = 327), consisting of male and female basketball players, tennis players and long-distance runners completed isometric strength assessments and CoD testing (90° and 180° turn tests). The times of both CoD tests were associated with muscle strength (peak torques and the rate of torque development variables), with correlation coefficients being mostly weak to moderate (r = 0.2–0.6). Strength variables explained 33%, 62% and 48% of the variance in the 90° turn task, and 42%, 36% and 59% of the variance in the 180° turn task, in basketball players, long-distance runners and tennis players, respectively. Hip and trunk muscle strength variables were the most prevalent in the regression models, especially hip adduction and abduction strength. Our results suggest that the strength of several lower limb muscles, in particular of the hip abductors and adductors, and trunk muscles, but also hip rotators, extensors and flexors, as well as knee and ankle flexors and extensors should be considered when aiming to improve CoD performance.

Effects of a Combined Upper- and Lower-Limb Plyometric Training Program on High-Intensity Actions in Female U14 Handball Players

2019 ◽  
Vol 31 (4) ◽  
pp. 465-472 ◽  
Author(s):  
Mehrez Hammami ◽  
Rodrigo Ramirez-Campillo ◽  
Nawel Gaamouri ◽  
Gaith Aloui ◽  
Roy J. Shephard ◽  
...  
Keyword(s):  
Training Program ◽  
Lower Limb ◽  
Upper Body ◽  
Plyometric Training ◽  
Countermovement Jump ◽  
Change Of Direction ◽  
Jump Test ◽  
Body Strength ◽  
Improved Performance ◽  
Experimental Group

Purpose: To analyze the effects of a 9-week plyometric training program on the sprint times (5, 10, 20, and 30 m), change-of-direction speed (modified T test and modified Illinois test), jumping (squat jump, countermovement jump, countermovement jump with arms, and horizontal 5-jump test), upper-body strength (right and left handgrip, back extensor strength, and medicine ball throw), and balance (Y and stork balance tests) of female handball players. Methods: Athletes were randomly divided into experimental (n = 21; age = 13.5 [0.3] y) and control (n = 20; age = 13.3 [0.3] y) groups. Training exercises and matches were performed together, but the experimental group replaced a part of their normal regimen by biweekly upper- and lower-limb plyometric training. Results: Both groups improved performance, but to a greater extent in the experimental group compared with controls for 20- and 30-m sprint times (Δ% = 9.6, P < .05, d = 0.557 and Δ% = 20.9, P < .001, d = 1.07, respectively), change of direction (T test: P < .01, Δ% = 14.5, d = 0.993 and Illinois test: P < .01, Δ% = 7.9, d = 0.769), vertical and horizontal jumping (P < .05), all measures of upper-limb strength (P < .001), and left-leg stork balance (P < .001, Δ% = 49.9, d = 1.07). Conclusions: A plyometric training program allows female junior handball players to improve important components of their physical performance.

scholarly journals The effect of limb dominance on change of direction biomechanics: A systematic review of its importance for injury risk

2019 ◽  
Vol 37 ◽  
pp. 179-189 ◽  
Author(s):  
Thomas Dos’Santos ◽  
Chris Bishop ◽  
Christopher Thomas ◽  
Paul Comfort ◽  
Paul A. Jones
Keyword(s):  
Systematic Review ◽  
Injury Risk ◽  
Change Of Direction ◽  
Limb Dominance

Effects of age and limb dominance on upper and lower limb muscle function in healthy males and females aged 40–80 years

2010 ◽  
Vol 28 (6) ◽  
pp. 667-677 ◽  
Author(s):  
Massimiliano Ditroilo ◽  
Roberta Forte ◽  
Piero Benelli ◽  
Danilo Gambarara ◽  
Giuseppe De vito
Keyword(s):  
Lower Limb ◽  
Muscle Function ◽  
Lower Limb Muscle ◽  
Limb Muscle ◽  
Males And Females ◽  
Limb Dominance ◽  
Healthy Males

scholarly journals The influence of lower-limb dominance on postural balance

2011 ◽  
Vol 129 (6) ◽  
pp. 410-413 ◽  
Author(s):  
Angélica Castilho Alonso ◽  
Guilherme Carlos Brech ◽  
Andréia Moraes Bourquin ◽  
Julia Maria D'Andréa Greve
Keyword(s):  
Lower Limb ◽  
Postural Balance ◽  
Sensory Information ◽  
Cross Sectional Study ◽  
Balance Test ◽  
Cross Sectional ◽  
Balance System ◽  
Leg Dominance ◽  
Limb Dominance ◽  
Instability Indices

CONTEXT AND OBJECTIVE: Maintainance of postural balance requires detection of body movements, integration of sensory information in the central nervous system and an appropriate motor response. The purpose of this study was to evaluate whether lower-limb dominance has an influence on postural balance. DESIGN AND SETTING: This was a cross-sectional study conducted at Faculdade de Medicina da Universidade de São Paulo (FMUSP) and at Hospital do Coração (HCor). METHODS: Forty healthy sedentary males aged 20 to 40 years, without any injuries, were evaluated. A single-foot balance test was carried out using the Biodex Balance System equipment, comparing the dominant leg with the nondominant leg of the same individual. The instability protocols used were level 8 (more stable) and level 2 (less stable), and three instability indices were calculated: anteroposterior, mediolateral and general. RESULTS: The volunteers' mean age was 26 ± 5 years (range: 20-38), mean weight 72.3 ± 11 kg (range: 46-107) and mean height 176 ± 6 cm (range: 169-186). Thirty-four of them (85%) presented right-leg dominance (defined according to which leg they used for kicking) and six (15%) had left-leg dominance. There were no significant differences between the dominant and nondominant legs at the two levels of stability (eight and two), for any of the instability indices (general, anteroposterior and mediolateral). CONCLUSION: The lower-limb dominance did not influence single-foot balance among sedentary males.

Effect of power on agility, linear speed and change of direction deficit in female soccer players

2021 ◽  
Vol 9 (1) ◽  
pp. 109-116
Author(s):  
Patricia Fischerova ◽  
Roksana Krosta ◽  
Artur Gołaś ◽  
Artur Terbalyan ◽  
Magdalena Nitychoruk ◽  
...  
Keyword(s):  
Lower Limb ◽  
Muscle Power ◽  
Body Height ◽  
Soccer Players ◽  
Linear Speed ◽  
Change Of Direction ◽  
Counter Movement Jump ◽  
Fitness Tests ◽  
The Difference ◽  
Better Than

Introduction: The aim of the study was to examine relationships between power of the lower limb and agility, speed, and change of direction (COD) deficit in professional female soccer players. Material and methods: Thirty-three elite Polish Extraliga league soccer players (aged 22 ±5 years; body height 166 ± 4 cm; body weight 58 ± 8 kg) performed the following fitness tests: lower limb muscle power (Leg Press, Half Squat, Counter Movement Jump), straight linear speed (SLS 20 m), and COD speed ( Zig-Zag test, COD deficit). Using the median value as a reference, the players were subdivided into two groups (n=17; n=16) according to their LP, HS 60% 1RM, CMJ (High values below median = stronger group and Low = weaker group ). Results: The COD deficit was calculated as the difference between the 20m speed and the Zig-Zag test. The stronger group was better than the weaker group in SLS 20m (p<0.05; ES=1.23; 0.83; 0.93), but in the Zig-Zag agility test, the difference in the results was not statistically significant (p>0.05; ES=0.48; 0.34; 0.34) and this affected the COD deficit, which was higher (p<0.05; ES=0.9; 0.73; 0.72). The most important finding was that the stronger group had a higher COD deficit and its improvement (reduction) occurs only if the results of the agility test are improved (through agility training) [Ydeficit All groups=0.10+0.87*20m - 0.83* Zig-Zag]. Increasing power (HS, LP) lead to the improvement in SLS p<0.05, not to COD abilities. Conclusion: This can be useful for coaches during agility training and to improve COD deficit in soccer players and women in general.

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