The effects of hamstring training methods on muscle viscoelastic properties in healthy young individuals

Abstract

Hamstring strain injuries are one of the most common non-contact injuries in sports and have a high recurrence rate that can cause result in time away from competition or impaired performance on return to competition for athletes. 1,2 The causes of the hamstring strain injuries are multifactorial. It is believed that general muscle properties, including passive viscoelastic parameters (muscle tone, elasticity, and stiffness), help to avoid injuries and overtraining. 3 Each viscoelastic parameter plays an important role for enhancing muscular performance (including improving running speed, jumping) and reducing the onset of fatigue and risk for injury or recurrence. 4-6 Furthermore, they are also valuable in clinical use to evaluate treatment efficacy and progression of the symptoms. 3 The mechanical properties of muscles are described by their viscoelasticity when skeletal muscles are in a steady-state condition with no voluntary contraction. 7 Muscle tone is generated actively by the nervous system and passively by the muscle's intrinsic viscoelastic properties. The intrinsic aspects of muscle tone comprise passive stiffness and the inherent mechanical properties of the tissues. 7 Muscle elasticity represents the ability of the muscle to recover its initial shape after a contraction

The Effects of Eccentric Strength Training on Flexibility and Strength in Healthy Samples and Laboratory Settings: A Systematic Review

“…Additionally, the hand-search of references revealed 17 records, of which 6 were included in the systematic search of In the end a total of 18 studies met all inclusion criteria (Blazevich et al, 2007;Duclay et al, 2009;Potier et al, 2009;Guilhem et al, 2013;Franchi et al, 2014;Sharifnezhad et al, 2014;Coratella et al, 2015;Timmins et al, 2016b;Bourne et al, 2017;Seymore et al, 2017;Abdel-Aziem et al, 2018;Kay et al, 2018;Ribeiro-Alvares et al, 2018;Duhig et al, 2019;Delvaux et al, 2020;Marušič et al, 2020;Benford et al, 2021;Uysal et al, 2021) and were included in this systematic review.…”

“…Samples' mean age ranged from 19 (Kay et al, 2018) to 28 years (Potier et al, 2009;Seymore et al, 2017). 11 of the 18 studies included males only (Duclay et al, 2009;Guilhem et al, 2013;Franchi et al, 2014;Coratella et al, 2015;Timmins et al, 2016b;Bourne et al, 2017;Abdel-Aziem et al, 2018;Duhig et al, 2019;Delvaux et al, 2020;Benford et al, 2021;Uysal et al, 2021). 15 studies examined FL changes by ultrasound (Blazevich et al, 2007;Duclay et al, 2009;Potier et al, 2009;Guilhem et al, 2013;Franchi et al, 2014;Sharifnezhad et al, 2014;Coratella et al, 2015;Timmins et al, 2016b;Bourne et al, 2017;Seymore et al, 2017;Kay et al, 2018;Ribeiro-Alvares et al, 2018;Duhig et al, 2019;Marušič et al, 2020;Benford et al, 2021).…”

Effects of Different Long-Term Exercise Modalities on Tissue Stiffness

“…An eccentric hamstring training was tested by Uysal et al in physically inactive individuals [ 33 ]. The authors compared eccentric hamstring training to concentric leg curl training relative to quadriceps and hamstring muscles characteristics.…”

Influence of Spinal Movements Associated with Physical Evaluation on Muscle Mechanical Properties of the Lumbar Paraspinal in Subjects with Acute Low Back Pain

“…Third, although 35 years has been used to distinguish younger than older adults [ 32 , 46 , 47 ], other age classifications could provide different results and interpretations. Additionally, the study of other factors, such as the level of physical activity, work or leisure-time activity [ 60 , 61 , 62 ], among others, could have afforded other relationship patterns to the results. Furthermore, adding other techniques to analyse muscle characteristics, such as surface electromyography, could provide information on normal or unusual activity, such as muscle spasm during the evaluation.…”