The Effects of 6 Weeks Eccentric Training on Speed, Dynamic Balance, Muscle Strength, Power, and Lower Limb Asymmetry in Prepubescent Weightlifters

2020 ◽  
Vol Publish Ahead of Print ◽  
Author(s):  
Raouf Hammami ◽  
Michael J. Duncan ◽  
Ammar Nebigh ◽  
Hanen Werfelli ◽  
Haithem Rebai
Keyword(s):  
Muscle Strength ◽  
Lower Limb ◽  
Dynamic Balance ◽  
Eccentric Training ◽  
Limb Asymmetry

scholarly journals Association between Inter-Limb Asymmetries in Lower-Limb Functional Performance and Sport Injury: A Systematic Review of Prospective Cohort Studies

2022 ◽  
Vol 11 (2) ◽  
pp. 360
Author(s):  
Yanfei Guan ◽  
Shannon S. D. Bredin ◽  
Jack Taunton ◽  
Qinxian Jiang ◽  
Nana Wu ◽  
...  
Keyword(s):  
Systematic Review ◽  
Cohort Studies ◽  
Lower Limb ◽  
Prospective Cohort ◽  
Sport Injury ◽  
Functional Performance ◽  
Dynamic Balance ◽  
Prospective Cohort Studies ◽  
Increased Risk ◽  
Limb Asymmetry

Background: Inter-limb asymmetry in lower-limb functional performance has been associated with increased risk of sport injury; however, findings are not always consistent. Purpose: To conduct a systematic review on whether inter-limb asymmetry in lower-limb functional performance can predict sport injury. Methods: Four electronic databases (MEDLINE, EMBASE, Web of Science, and SportDiscus) were systematically searched for prospective cohort studies reporting the association between inter-limb asymmetry in lower-limb functional performance and sport injury. Results: A total of 28 prospective cohort studies were included in the analyses. Collectively, the findings were highly inconsistent, and a clear statement on the association between each asymmetry and sport injury was difficult. Conclusions: Highly inconsistent findings make it difficult to create clear recommendations on the relationship between the inter-limb asymmetry in lower-limb functional performance (power, muscle flexibility, and dynamic balance) and sport injury. The influence of potential factors (selection of tests/parameters, participant characteristics, definition of injury, and ways of calculating asymmetry) should be considered when using previous findings.

scholarly journals Impact of lower limb muscle strength on walking function beyond aging and diabetes

2020 ◽  
Vol 48 (6) ◽  
pp. 030006052092882
Author(s):  
Ran Wu ◽  
Yan Zhang ◽  
Jiao-Jiao Bai ◽  
Jiao Sun ◽  
Zhi-Jun Bao ◽  
...  
Keyword(s):  
Muscle Strength ◽  
Lower Limb ◽  
Dynamic Balance ◽  
Study Data ◽  
Advanced Age ◽  
Lower Limb Muscle ◽  
Limb Muscle ◽  
Timed Up And Go ◽  
Cross Sectional ◽  
Patients With Diabetes

Objective This study was performed to investigate the influence of lower limb muscle strength on the walking function of advanced-age patients with diabetes. Methods In this cross-sectional descriptive study, data were collected from 202 advanced-age patients with diabetes. All patients completed questionnaires, the one-leg stance test, the timed up-and-go test, the 30-s sit-to-stand test, and plantar pressure platform measurements. The patients were divided in two groups according to their lower limb muscle strength: those with declining muscle strength and those with normal muscle strength. Results Walking function was significantly abnormal in the patients with declining lower limb muscle strength. The gait trajectories were abnormal, mainly with respect to a shortage of driving force. Conclusion The lower limb muscle strength can affect the static balance and dynamic balance in advanced-age patients with declining lower limb muscle strength.

scholarly journals Comparative Effect of Core Stabilization Exercise and Active Video Gaming on Dynamic Balance in Elderly Female People: a SingleBlind Randomized Controlled Clinical Trial

2021 ◽  
Author(s):  
Chatwalai Sonthikul ◽  
Nurulhuda Hadhoh ◽  
Nurulhuda Madeeyoh ◽  
Aungsuma Ponlakarn ◽  
Natthawat Dolthamsiri
Keyword(s):  
Reaction Time ◽  
Muscle Strength ◽  
Lower Limb ◽  
Dynamic Balance ◽  
Video Gaming ◽  
P Value ◽  
Lower Limb Muscle ◽  
Limb Muscle ◽  
Stabilization Exercise ◽  
Active Video

Objective: The elderly have a decrease in muscle power and cognitive functions, leading to a higher risk of falling. The core stabilization exercise is a standard exercise for the elderly, but is considered as non-interesting and has no immediate feedback. On the other hand, active video gaming is new technology, more interesting and provides immediate feedback. Thus, the objective was to compare the effectiveness of core stabilization exercise (CSE) and active video gaming (AVG) on dynamic balance, core and lower limb muscle strength and reaction time in elderly people.Material and Methods: This study was a single-blind randomized controlled trial design; conducted from January to April, 2019. The participants were 34, healthy, elderly patients; who were randomly assigned to either the CSE group (n=17) or AVG group (n=17). All participants received a training program consisting of 60 minutes, 3 times a week, for 6 weeks. The CSE group received a core stabilization exercise program, while the AVG group received video gaming with balance control on a moveable platform (Sensamove® , the Netherlands). The participants were assessed for dynamic balance, core and lower limb muscle strength, and reaction time at pre-, two, forth, and sixth week. Results: The AVG group showed superior and significant difference to the CSE group in dynamic balance after forth (p-value=0.004; 95% confidence interval (CI), -0.94 to -0.11) and sixth week (p-value=0.001; 95% CI, -1.22 to -0.25) of training, and reaction time after forth (p-value=0.028; 95% CI, -37.89 to –0.24) and sixth week of training (p-value= 0.026; 95% CI, -72.08 to -10.13). However, within group comparison, after sixth weeks of training, the CSE group had significantly increased in core (p-value=0.020; 95% CI, 1.01 to 21.55) and lower limb muscle strength (p-value=0.008; 95% CI, -2.68 to -0.39). In addition, the AVG group had significantly increased in dynamic balance (p-value=0.001; 95% CI, -2.18 to -0.66), lower limb muscle strength (p-value=0.001; 95% CI, -2.38 to -0.66), and reaction time (p-value= 0.007; 95% CI, -120.99 to -22.64).Conclusion: Active video gaming showed better effectiveness than the core stabilization exercise in both dynamic balance and reaction time. Between before and after six weeks of training, the core stabilization exercise increased in core and lower limb muscle strength. In addition, active video gaming increased in dynamic balance, lower limb muscle strength and reaction time. So, active video gaming can be added in generic rehabilitation for improvement of muscle strength, reaction time and balance.

scholarly journals Comparison of Balance and Strength of Lower Limb Muscles Between two Groups of People With Covid-19 and Healthy Ones: A Cross-Sectional Study

2021 ◽  
Vol 10 (3) ◽  
pp. 486-495
Author(s):  
Amir Ali Jafarnezhadgero ◽  
◽  
Amin Hoseinpour ◽  
Keyword(s):  
Muscle Strength ◽  
Lower Limb ◽  
Dynamic Balance ◽  
Lower Limb Muscle ◽  
Limb Muscle ◽  
Balance Test ◽  
Cross Sectional ◽  
Significance Level ◽  
Healthy Group ◽  
Significant Difference

Background and Aims This study evaluated dynamic balance, quadriceps, and hamstring strength in individuals with Covid 19 compared with healthy control ones. Methods A total of 30 people were divided into two groups, including healthy people (n=15) and people with Covid-19. Dynamic balance was measured using the star excursion balance test. A dynamometer performed lower limb muscle strength measurements. An independent t-test was used to compare the two groups statistically. The significance level was considered 0.05. Results Quadriceps and hamstring muscle strength were similar in both groups (P>0.05). The results showed that the values of dynamic balance in the lateral (P=0.001), medial (P=0.001), and posterior medial (P=0.001) directions were significantly lower in the group with Covid-19 than that in the healthy group. Conclusion In general, the balance of people with Covid-19 was significantly lower than the healthy group. Decreased balance due to this disease can increase the risk of injury. There was no significant difference in lower limb muscle strength in patients with Covid-19 compared with healthy individuals. Perhaps more research is needed in the future to prove this better.

scholarly journals The Effect of Lower Limb Resistance Exercise with Elastic Band on Balance, Walking Speed, and Muscle Strength in Elderly Women

2019 ◽  
Author(s):  
Mohammad Reza Vafaeenasab ◽  
Najme Kuchakinejad Meybodi ◽  
Hamid Reza Fallah ◽  
Mohammad Ali Morowatisharifabad ◽  
Seyeseh Mahdieh Namayandeh ◽  
...  
Keyword(s):  
Muscle Strength ◽  
Lower Limb ◽  
Walking Speed ◽  
Elderly Women ◽  
Dynamic Balance ◽  
Exercise Program ◽  
Static Balance ◽  
Elastic Band ◽  
The Mean ◽  
Experimental Group

Introduction: The aim of this study was to investigate the effect of an 8-week resistance exercise program on balance, walking speed, and muscle strength in elderly women.   Methods: This randomized controlled trial was performed on 50 elderly women aged 60-66 years who were assigned to two groups of experimental and control. The Time Up and Go test, was used to measure dynamic balance, Romberg's test was used to measure static balance, and the 10 Meter Walk Test was used to measure walking speed, and the 30 Second Chair Stand test was used to measure muscle strength. Paired t-test and independent t-test was used for comparing balance time before and after the exercise program.   Results: The mean duration of static balance increased in the experimental group from 21.64 ± 10.98 before exercise to 28.20 ± 13.47 after exercise (p < 0.001). The mean duration of Up and Go Time decreased from 12.88 ± 1.45 seconds before exercise to 10.80 ± 1.80 seconds after exercise (p < 0.001). Ten-meter walking time in the experimental group decreased from 1.15 ± 0.1 seconds before exercise to 1.00 ± 0.11 seconds after exercise (p < 0.001) and muscle strength in the experimental group increased from 7.8 ± 1 before exercise to 9.56 ± 1.71 after exercise (p < 0.001).   Conclusion: Lower limb resistance exercises with elastic band improve static and dynamic balance and also walking speed, which possibly improve muscle strength. It is recommended that these exercises be considered in developing the elderly women's health care programs due to their accessibility, affordability, and reliability.

scholarly journals Reduced Lower-Limb Muscle Strength and Volume in Patients With Type 2 Diabetes in Relation to Neuropathy, Intramuscular Fat, and Vitamin D Levels

Diabetes Care ◽  
2016 ◽  
Vol 39 (3) ◽  
pp. 441-447 ◽  
Author(s):  
Monirah M. Almurdhi ◽  
Neil D. Reeves ◽  
Frank L. Bowling ◽  
Andrew J.M. Boulton ◽  
Maria Jeziorska ◽  
...  
Keyword(s):  
Type 2 Diabetes ◽  
Vitamin D ◽  
Muscle Strength ◽  
Lower Limb ◽  
Intramuscular Fat ◽  
Lower Limb Muscle ◽  
Limb Muscle ◽  
Vitamin D Levels

The effectiveness of blood-flow restricted resistance training in the musculoskeletal rehabilitation of patients with lower limb disorders: A systematic review and meta-analysis

2021 ◽  
pp. 026921552110034
Author(s):  
Nico Nitzsche ◽  
Alexander Stäuber ◽  
Samuel Tiede ◽  
Henry Schulz
Keyword(s):  
Blood Flow ◽  
Resistance Training ◽  
Muscle Strength ◽  
Lower Limb ◽  
Meta Analysis ◽  
Load Resistance ◽  
Muscle Volume ◽  
Low Load ◽  
Study Characteristics ◽  
Musculoskeletal Rehabilitation

Objective: This meta-analysis aimed to evaluate the effectiveness of low-load Resistance Training (RT) with or without Blood Flow Restriction (BFR) compared with conventional RT on muscle strength in open and closed kinetic chains, muscle volume and pain in individuals with orthopaedic impairments. Data sources: Searches were conducted in the PubMed, Web of Science, Scopus and Cochrane databases, including the reference lists of randomised controlled trials (RCT’s) up to January 2021. Review method: An independent reviewer extracted study characteristics, orthopaedic indications, exercise data and outcome measures. The primary outcome was muscle strength of the lower limb. Secondary outcomes were muscle volume and pain. Study quality and reporting was assessed using the TESTEX scale. Results: A total of 10 RCTs with 386 subjects (39.2 ± 17.1 years) were included in the analysis to compare low-load RT with BFR and high or low-load RT without BFR. The meta-analysis showed no significant superior effects of low-load resistance training with BFR regarding leg muscle strength in open and closed kinetic chains, muscle volume or pain compared with high or low-load RT without BFR in subjects with lower limb impairments. Conclusion: Low-load RT with BFR leads to changes in muscle strength, muscle volume and pain in musculoskeletal rehabilitation that are comparable to conventional RT. This appears to be independent of strength testing in open or closed kinetic chains.

scholarly journals COVID-19 era in long-term cardiac rehabilitation programs: how was muscle strenght and lean mass affected in cardiovascular patients?

2021 ◽  
Vol 28 (Supplement_1) ◽  
Author(s):  
M Borges ◽  
M Lemos Pires ◽  
R Pinto ◽  
G De Sa ◽  
I Ricardo ◽  
...  
Keyword(s):  
Muscle Strength ◽  
Cardiac Rehabilitation ◽  
Lean Mass ◽  
Lower Limb ◽  
Lower Limbs ◽  
Phase Iii ◽  
Face To Face ◽  
Home Based ◽  
Lower Limb Strength

Abstract Funding Acknowledgements Type of funding sources: None. Introduction Exercise prescription is one of the main components of phase III Cardiac Rehabilitation (CR) programs due to its documented prognostic benefits. It has been well established that, when added to aerobic training, resistance training (RT) leads to greater improvements in peripheral muscle strength and muscle mass in patients with cardiovascular disease (CVD). With COVID-19, most centre-based CR programs had to be suspended and CR patients had to readjust their RT program to a home-based model where weight training was more difficult to perform. How COVID-19 Era impacted lean mass and muscle strength in trained CVD patients who were attending long-term CR programs has yet to be discussed. Purpose To assess upper and lower limb muscle strength and lean mass in CVD patients who had their centre-based CR program suspended due to COVID-19 and compare it with previous assessments. Methods 87 CVD patients (mean age 62.9 ± 9.1, 82.8% male), before COVID-19, were attending a phase III centre-based CR program 3x/week and were evaluated annually. After 7 months of suspension, 57.5% (n = 50) patients returned to the face-to-face CR program. Despite all constraints caused by COVID-19, body composition and muscle strength of 35 participants (mean age 64.7 ± 7.9, 88.6% male) were assessed. We compared this assessment with previous years and established three assessment time points: M1) one year before COVID-19 (2018); M2) last assessment before COVID-19 (2019); M3) the assessment 7 months after CR program suspension (last trimester of 2020). Upper limbs strength was measured using a JAMAR dynamometer, 30 second chair stand test (number of repetitions – reps) was used to measure lower limbs strength and dual energy x-ray absorptiometry was used to measure upper and lower limbs lean mass. Repeated measures ANOVA were used. Results Intention to treat analysis showed that upper and lower limbs lean mass did not change from M1 to M2 but decreased significantly from M2 to M3 (arms lean mass in M2: 5.68 ± 1.00kg vs M3: 5.52 ± 1.06kg, p = 0.004; legs lean mass in M2: 17.40 ± 2.46kg vs M3: 16.77 ± 2.61kg, p = 0.040). Lower limb strength also decreased significantly from M2 to M3 (M2: 23.31 ± 5.76 reps vs M3: 21.11 ± 5.31 reps, p = 0.014) after remaining stable in the year prior to COVID-19. Upper limb strength improved significantly from M1 to M2 (M1: 39.00 ± 8.64kg vs M2: 40.53 ± 8.77kg, p = 0.034) but did not change significantly from M2 to M3 (M2 vs M3: 41.29 ± 9.13kg, p = 0.517). Conclusion After CR centre-based suspension due to COVID-19, we observed a decrease in upper and lower limbs lean mass and lower limb strength in previously trained CVD patients. These results should emphasize the need to promote all efforts to maintain physical activity and RT through alternative effective home-based CR programs when face-to-face models are not available or possible to be implemented.

scholarly journals Effects of lower limb resistance exercise on muscle strength, physical fitness, and metabolism in pre-frail elderly patients: a randomized controlled trial

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Xiaoxing Lai ◽  
Lin Bo ◽  
Hongwei Zhu ◽  
Baoyu Chen ◽  
Zhao Wu ◽  
...  
Keyword(s):  
Muscle Strength ◽  
Resistance Exercise ◽  
Frail Elderly ◽  
Lower Limb ◽  
Intervention Group ◽  
Control Group ◽  
Walking Test ◽  
Sit To Stand ◽  
Femoris Muscle ◽  
Activity Energy

Abstract Background Few studies examined interventions in frail elderly in China, while the awareness of applying interventions to prevent frailty in pre-frail elderly is still lacking. This study aimed to explore the effects of lower limb resistance exercise in pre-frail elderly in China. Methods This was a randomized controlled trial of patients with pre-frailty. The control group received routine care, while the exercise group received a 12-week lower limb resistance exercise based on routine care. The muscle strength in the lower limbs, physical fitness, and energy metabolism of the patients was evaluated at admission and after 12 weeks of intervention. Results A total of 60 pre-frail elderly were included in this study. The patients were divided into the exercise group (n = 30) and control group (n = 30) by random grouping. There were 17 men and 13 women aged 65.3 ± 13.4 in the exercise group, and 15 men and 15 women aged 67.6 ± 11.9 years in the control groups. The Barthel index was 80.3 ± 10.6 and 85.1 ± 11.6, respectively. The characteristics of the two groups were not significantly different before intervention (all p > 0.05). The results of repeated measurement ANOVA showed that there was statistically significant in crossover effect of group * time (all p < 0.05), that is, the differences of quadriceps femoris muscle strength, 6-min walking test, 30-s sit-to-stand test, 8-ft “up & go” test, daily activity energy expenditure and metabolic equivalent between the intervention group and the control group changed with time, and the variation ranges were different. The main effects of time were statistically significant (all p < 0.05), namely, femoris muscle strength, 6-min walking test, 30-s sit-to-stand test, 8-ft “up & go” test, daily activity energy expenditure and metabolic equivalent of the intervention group and the control group were significantly different before and after intervention. The main effects of groups were statistically significant (p < 0.05), namely, femoris muscle strength, 6-min walking test, 30-s sit-to-stand test, daily activity energy expenditure and metabolic equivalent before and after intervention were significantly different between the intervention group and the control group, while there was no significant differences in 8-ft “up & go” test between groups. Conclusion Lower limb resistance exercise used for the frailty intervention could improve muscle strength, physical fitness, and metabolism in pre-frail elderly. Trial registration ChiCTR, ChiCTR2000031099. Registered 22 March 2020, http://www.chictr.org.cn/edit.aspx?pid=51221&htm=4

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