scholarly journals Inter-Limb Asymmetry in Force Accuracy and Steadiness Changes after a 12-Week Strength Training Program in Young Healthy Men

Symmetry ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 2226
Author(s):  
Rafał Szafraniec ◽  
Tadeusz Stefaniak ◽  
Dariusz Harmaciński ◽  
Michał Kuczyński
Keyword(s):  
Strength Training ◽  
Training Program ◽  
Lower Limb ◽  
Lower Limbs ◽  
Matching Task ◽  
Healthy Men ◽  
Force Matching ◽  
Limb Asymmetry ◽  
The Impact ◽  
Force Accuracy

The study aimed to investigate the impact of a 12-week strength training program on force accuracy and steadiness changes in lower limbs in young healthy men. Twenty subjects with a dominant right lower limb were included. They performed a force matching task both pre and post strength training program. The ability to reproduce force was determined by calculating three errors: absolute error (AE), constant error (CE), and variable error (VE). After intervention AE and VE improved in both legs indicating higher improvement in the dominant leg (p = 0.032 for AE and p = 0.005 for VE). However, CE improved only in the dominant leg (p = 0.001). We conclude that strength training improved the accuracy and consistency of force in a force reproduction task. This improvement was more evident in the dominant lower limb. Most likely, the inter-limb asymmetry in changes of force application ability caused by strength training is due to the different mechanisms responsible for the control of voluntary movements in the dominant and non-dominant lower limb.

The impact of strength training on the improvement of jumping ability and selected power parameters of the lower limbs in soccer players

2021 ◽  
Vol 13 (1) ◽  
pp. 83-90
Author(s):  
PATRICIA FISCHEROVA ◽  
MAGDALENA NITYCHORUK ◽  
WOJCIECH SMOLKA ◽  
MARCIN ZAK ◽  
ARTUR GOLAS ◽  
...  
Keyword(s):  
Strength Training ◽  
Training Program ◽  
Body Height ◽  
Skills Training ◽  
Lower Limbs ◽  
Soccer Players ◽  
Control Group ◽  
Football Training ◽  
The Impact ◽  
Experimental Group

Introduction: The aim of the study was to compare the impact of a 6-week program combined with football training and strength training on strength and power parameters in highly trained soccer players. It was hypothesized that 6 weeks would be enough for the experimental group to improve their jumping ability and pushing power. Material and methods: The study involved 34 female footballers playing in Ekstraliga (age: 22 ± 5 years; body height: 167 ± 5 cm; body weight: 60 ± 8 kg). The contestants were divided into an experimental group and a control group of 17 people in each group. The control group performed football trainings combined with 2 additional strength units (50% 1RM load) 3 times a week. The experimental group, apart from football trainings, additionally performed 2 strength trainings per week (50–85% 1RM load). Results: The results of the experiment show a significant improvement in the height of the vertical jump and bench press while sitting in the experimental group CMJ (p <0.05; p = 0.000029; ES: 1.00; 11%), CMJA (p <0.05; p = 0 00003; ES = 1.09; 13%), and LP (p <0.05; p = 0.027681; ES = 0.48; 6%), while in the control group the changes in the results after the training program were statistically insignificant CMJ (p> 0.05; p = 0.274000; ES: 0.07, 1%), CMJA (p> 0.05; p = 0.350958 ES = 0.27, 3%), and LP (p> 0.05; p = 0.130153; ES = 0.27; 4%). Conclusion: The presented research results suggest that a short, six-week training program including general football training and strength training performed twice a week with loads gradually increasing during the preparatory period may significantly improve the strength and jumping parameters of the lower limbs in soccer players. Such information can be valuable at the stage of training in the field of special skills training in football.

scholarly journals Effects of Strength Training Combined with Specific Plyometric exercises on body composition, vertical jump height and lower limb strength development in elite male handball players: a case study

2014 ◽  
Vol 41 (1) ◽  
pp. 125-132 ◽  
Author(s):  
Alberto Carvalho ◽  
Paulo Mourão ◽  
Eduardo Abade
Keyword(s):  
Body Composition ◽  
Strength Training ◽  
Body Fat ◽  
Lower Limb ◽  
Vertical Jump ◽  
Fat Content ◽  
Lower Limbs ◽  
Strength Development ◽  
Lower Limb Strength ◽  
Body Fat Content

AbstractThe purpose of the present study was to identify the effects of a strength training program combined with specific plyometric exercises on body composition, vertical jump (VJ) height and strength development of lower limbs in elite male handball players. A 12-week program with combined strength and specific plyometric exercises was carried out for 7 weeks. Twelve elite male handball players (age: 21.6 ± 1.73) competing in the Portuguese Major League participated in the study. Besides the anthropometric measurements, several standardized jump tests were applied to assess VJ performance together with the strength development of the lower limbs in an isokinetic setting. No significant changes were found in body circumferences and diameters. Body fat content and fat mass decreased by 16.4 and 15.7% respectively, while lean body mass increased by 2.1%. Despite small significance, there was in fact an increase in squat jump (SJ), counter movement jump (CMJ) and 40 consecutive jumps after the training period (6.1, 3.8 and 6.8%, respectively). After the applied protocol, peak torque increased in lower limb extension and flexion in the majority of the movements assessed at 90°s-1. Consequently, it is possible to conclude that combining general strength-training with plyometric exercises can not only increase lower limb strength and improve VJ performance but also reduce body fat content.

scholarly journals Asymmetry and changes in the neuromuscular profile of short-track athletes as a result of strength training

PLoS ONE ◽  
2021 ◽  
Vol 16 (12) ◽  
pp. e0261265
Author(s):  
Paweł Pakosz ◽  
Anna Lukanova-Jakubowska ◽  
Edyta Łuszczki ◽  
Mariusz Gnoiński ◽  
Oscar García-García
Keyword(s):  
Strength Training ◽  
Lower Limb ◽  
Female Athletes ◽  
Lower Limbs ◽  
Lower Limb Muscles ◽  
Limb Muscles ◽  
Before And After ◽  
Monthly Period ◽  
Track Athletes ◽  
The Right

Background The purpose of this study was to identify the biomedical signals of short-track athletes by evaluating the effects of monthly strength training on changes in their neuromuscular profile, strength, and power parameters of the lower limb muscles. Muscle asymmetry, which can cause a risk of injury, was also evaluated. Methods and results This study involved female athletes, age 18.8 ± 2.7 years, with a height of 162 ± 2.4 cm, and weight of 55.9 ± 3.9 kg. Before and after the monthly preparatory period prior to the season, strength measurements were assessed through the Swift SpeedMat platform, and reactivity of the lower limb muscles was assessed with tensiomyography (TMG). The athletes were also tested before and after the recovery training period. In the test after strength training, all average countermovement jump (CMJ) results improved. Flight time showed an increase with a moderate to large effect, using both legs (5.21%). Among the TMG parameters, time contraction (Tc) changed globally with a decrease (-5.20%). Changes in the results of the test after recovery training were most often not significant. Conclusion A monthly period of strength training changes the neuromuscular profile of short-track female athletes, with no significant differences between the right and left lower limbs.

scholarly journals Efecto de un programa de entrenamiento de fuerza sobre IGF-1 en adultos mayores con obesidad e hipertensión controlada (Effect of a strength training program on IGF-1 in older adults with obesity and controlled hypertension)

Retos ◽  
2020 ◽  
pp. 253-256
Author(s):  
Rogelio Galaviz Berelleza ◽  
Marina Trejo Trejo ◽  
Juan Carlos Borbón Román ◽  
Edgar Ismael Alarcón Meza ◽  
Heriberto Antonio Pineda Espejel ◽  
...  
Keyword(s):  
Older Adults ◽  
Strength Training ◽  
Training Program ◽  
Muscle Mass ◽  
Strength Loss ◽  
Serum Levels ◽  
Lower Limbs ◽  
Hormone Production ◽  
Anthropometric Measures ◽  
Anabolic Hormone

Introducción: A medida que se presenta el envejecimiento, los músculos disminuyen su tamaño y fuerza. La pérdida de masa muscular puede causar una disminución general de la función metabólica asociada a una baja producción hormonal anabólica y riesgo de lesión. La disminución de los niveles séricos de GH e IGF-1 debido al incremento de la edad pueden promover la fragilidad al contribuir a la pérdida de masa muscular y fuerza objetivo: Determinar efecto de un programa de entrenamiento de fuerza sobre IGF-1 en adultos mayores con obesidad e hipertensión controlada. Método: 8 adultos mayores con obesidad e hipertensión controlada, realizaron 6 semanas de entrenamiento de la fuerza con intensidades del 70% del 1RM, con una frecuencia de 4 veces por semana, previo al protocolo de entrenamiento se determinó triglicéridos, colesterol, glucosa e IGF-1 en sangre y medidas antropométricas (talla, peso, % grasa y masa muscular). Se aplicó un test de una repetición máxima (1RM) para evaluar la fuerza máxima en el tren superior e inferior antes y después del programa de entrenamiento. Resultados: Se observó un aumento significativo (p<0.05) en los niveles séricos de IGF-1, después de la realización del programa de entrenamiento. Conclusión: El entrenamiento de la fuerza con intensidades del 70% de la 1RM y frecuencia 4 realizado durante 6 semanas en adultos mayores con obesidad e hipertensión controlada, produjo incrementos en la concentración sérica de IGF-1 y un incremento de la fuerza muscular. Abstract. Introduction: As people age, muscles decrease in size and strength. Loss of muscle mass can cause a general decrease of metabolic function associated with low anabolic hormone production and risk of injury. The decrease in serum levels of GH and IGF-1 due to aging can provoke fragility by contributing to the loss of muscle mass and strength. Purpose: To determine the effect of a strength training program on IGF-1 in older adults with obesity and controlled hypertension. Method: a sample of 8 older adults with obesity and controlled hypertension performed 6 weeks of strength training with intensities of 70% 1RM and 10RM, with a frequency of 4 times per week. Prior to the protocol of Training, triglycerides, cholesterol, blood glucose IGF-1, and anthropometric measures (size, weight, % fat and muscle mass) were determined. The test of one maximum repetition (1rm) was performed to evaluate maximum force in upper and lower limbs before and after the training program. Results: A significant increase (p <0.05) was observed in serum IGF-1 levels after the completion of training program. Conclusion: Strength training with intensities of 70% of 1RM and frequency of 4 days/week, carried out for 6 weeks, produced increases in serum IGF-1 concentration and increased muscle strength in older adults with obesity and controlled hypertension.

scholarly journals INTRAOPERATIONAL CORRECTION OF HAEMODYNAMIC DISTURBANCES IN PATIENTS UNDERGOING LAPAROSCOPIC SURGERY FOR HIATAL HERNIA

2017 ◽  
Vol 8 (1) ◽  
pp. 40-45
Author(s):  
M A Burikov ◽  
I I Katelnitsky ◽  
I V Skazkin ◽  
L L Timofeeva
Keyword(s):  
Laparoscopic Surgery ◽  
Surgical Technique ◽  
Hiatal Hernia ◽  
Lower Limb ◽  
Lower Limbs ◽  
Venous Diameter ◽  
The Impact

The aim of the article is to review the results of regional lower limb haemodynamics, haemostatic disturbances in patients undergoing laparoscopic surgery for hiatal hernia and intermittent pneumocompression in terms of embolism prevention. The impact of laparoscopic surgical technique on linear bloodflow velocity and venous diameter in lower limbs.

scholarly journals Effects of Whole-Body Vibration Training on Lower Limb Blood Flow in Children with Myelomeningocele—A Randomized Trial

2021 ◽  
Vol 10 (18) ◽  
pp. 4273
Author(s):  
Małgorzata Domagalska-Szopa ◽  
Andrzej Szopa ◽  
Andrzej Siwiec ◽  
Ilona Kwiecień-Czerwieniec ◽  
Lutz Schreiber ◽  
...  
Keyword(s):  
Blood Flow ◽  
Lower Limb ◽  
Whole Body Vibration ◽  
Lower Limbs ◽  
Whole Body ◽  
Control Group ◽  
Body Vibration ◽  
Conventional Physiotherapy ◽  
Whole Body Vibration Training ◽  
The Impact

The objective of the present study was to determine the effectiveness of a three-week Whole-Body Vibration (WBV) training on the vascular blood flow of the lower limbs in children with myelomeningocele. The secondary goal was to evaluate the effect of WBV on the ROM of lower limb joints in this population. A total of 30 children with MMC (7–16 years old) were enrolled in the study. Children were randomly allocated to two groups of equal numbers, using an envelope code. The experimental group underwent a 3-week WBV training, while the control group received a 3-week conventional physiotherapy (PT) program. The examination consisted of two parts: (1) Doppler USG examination of the lower limb vascular blood flow; (2) evaluation of ROM. The results obtained revealed three main findings. First, WBV training effectively improved blood flow by increasing flow velocities in all tested arteries, while the impact of the PT program was limited to a single parameter. Second, WBV training effectively improved vascular resistance in arteries of the lower legs, while the PT program did not achieve any significant differences. Third, both types of treatment intervention significantly improved ROM in all joints of the lower limbs in MMC participants.

scholarly journals Impact of Self-Selected Customized Orthotics on Lower Limbs Biomechanics

2021 ◽  
Author(s):  
Benjamin Dourthe ◽  
Judith Osterloh ◽  
Vinzenz Von Tscharner ◽  
Sandro Nigg ◽  
Benno M. Nigg
Keyword(s):  
Isometric Contraction ◽  
Lower Limb ◽  
Statistical Significance ◽  
Lower Limbs ◽  
Patient Specific ◽  
Emg Activity ◽  
Post Intervention ◽  
Walking Intervention ◽  
Foot Arch ◽  
The Impact

Customized insoles are commonly prescribed to prevent or treat a variety of foot pathologies and to reduce foot and lower limb fatigue. Due to the patient-specific design and production of such orthotics, the concept of self-selected customized orthotics (SSCO) has recently been developed. The goal of this study was to assess the impact of SSCO technology on several physiological and biomechanical variables during uphill power walking. Thirty male participants underwent an uphill power walking intervention at constant speed in two insoles conditions (control and SSCO). The electromyographic (EMG) activity of their right gastrocnemii and vastii muscles was measured. Perceived fatigue was assessed every 5 minutes and the intervention stopped when the targeted fatigue level was reached. Baseline and post-intervention assessments were also performed. Sixty-three percent of the participants experienced an improvement in foot fatigue while wearing the SSCO. The foot arch seemed to collapse less when participants wore the SSCO, but statistical significance was not reached. The changes in mean EMG activity was not consistent between the 50% isometric contraction and the walking trial. In conclusion, while some interesting trends were observed when wearing SSCO, further investigations should be performed to try and reach statistical significance.

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