Relationship between resting medial gastrocnemius stiffness and drop jump performance

Ando, Ryosuke; Sato, Shinya; Hirata, Naoya; Tanimoto, Hiroki; Imaizumi, Naoto; Suzuki, Yasuhiro; Hirata, Kosuke; Akagi, Ryota

doi:10.1016/j.jelekin.2021.102549

Cited by 16 publications

(37 citation statements)

References 40 publications

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“…We expected an association between training-induced changes in the MG shear modulus and the RSI because of a positive relationship between the MG shear modulus and drop jump performance ( Ando et al, 2021 ). However, the drop jump performance for the training group improved after the intervention, whereas the MG shear modulus decreased.…”

Section: Discussionmentioning

confidence: 99%

“…Because joint stiffness is affected not only by the muscle but also the joint capsule, tendon, skin, and so on (Johns and Wright, 1962), the effect of long-term jump training on passive stiffness in the plantar flexor muscles is still unclear. Recently, ultrasound shear wave elastography was used to directly measure the longitudinal elasticity of muscle in vivo, and the results showed similar relationships between passive muscle stiffness and explosive performance as described above (Ando and Suzuki, 2019;Miyamoto et al, 2019;Ando et al, 2021). Therefore, ultrasound shear wave elastography must be employed to clarify the effect of jump training on muscle stiffness.…”

Section: Introductionmentioning

confidence: 89%

“…Furthermore, previous studies ( Malisoux et al, 2006 ; Fouré et al, 2009 , 2011 ) have not focused on the association between training-induced changes in passive muscle stiffness and explosive performance, even though passive muscle stiffness is considered to influence explosive performance. We clarified that the passive stiffness of the MG, not soleus (SOL), is positively related to RTD during isometric contraction ( Ando and Suzuki, 2019 ) and drop jump performance ( Ando et al, 2021 ). Thus, increased passive MG stiffness could be advantageous to explosive performance.…”

Section: Introductionmentioning

confidence: 93%

“…Passive muscle stiffness (muscle stiffness at rest) could be an important determinant in sports performance because it has been found to be associated with explosive performance ( Takahashi et al, 2018 ; Ando and Suzuki, 2019 ; Miyamoto et al, 2019 ; Ando et al, 2021 ). For example, we previously showed positive correlations of passive medial gastrocnemius (MG) stiffness with the rate of torque development (RTD) during maximal isometric plantar flexion ( Ando and Suzuki, 2019 ) and with drop jump performance ( Ando et al, 2021 ). In addition, Miyamoto et al (2019) showed that passive vastus lateralis stiffness positively related to the sprinting ability of sprinters.…”

Section: Introductionmentioning

confidence: 99%

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Relationship Between Drop Jump Training–Induced Changes in Passive Plantar Flexor Stiffness and Explosive Performance

et al. 2021

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Passive muscle stiffness is positively associated with explosive performance. Drop jump training may be a strategy to increase passive muscle stiffness in the lower limb muscles. Therefore, the purpose of this study was to examine the effect of 8-week drop jump training on the passive stiffness in the plantar flexor muscles and the association between training-induced changes in passive muscle stiffness and explosive performance. This study was a randomized controlled trial. Twenty-four healthy young men were divided into two groups, control and training. The participants in the training group performed drop jumps (five sets of 20 repetitions each) 3days per week for 8weeks. As an index of passive muscle stiffness, the shear moduli of the medial gastrocnemius and soleus were measured by shear wave elastography before and after the intervention. The participants performed maximal voluntary isometric plantar flexion at an ankle joint angle of 0° and maximal drop jumps from a 15cm high box. The rate of torque development during isometric contraction was calculated. The shear modulus of the medial gastrocnemius decreased for the training group (before: 13.5±2.1kPa, after: 10.6±2.1kPa); however, such a reduction was not observed in the control group. There was no significant group (control and training groups)×time (before and after the intervention) interaction for the shear modulus of the soleus. The drop jump performance for the training group improved, while the rate of torque development did not change. Relative changes in these measurements were not correlated with each other in the training group. These results suggest that drop jump training decreases the passive stiffness in the medial gastrocnemius, and training-induced improvement in explosive performance cannot be attributed to change in passive muscle stiffness.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 89%

Section: Introductionmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

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Relationship Between Drop Jump Training–Induced Changes in Passive Plantar Flexor Stiffness and Explosive Performance

et al. 2021

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“…Due to the high time pressure while performing a DJ, having stiffer tendons and/or muscles might be beneficial with regard to effective force transmission from the contractile element via the tendon to the bones [11,12]. Consequently, moderate positive correlations have been reported between gastrocnemius medialis muscle stiffness and jump height, as well as the reactive strength index (RSI = jump height/contact time), but not with contact time [12]. A further study reported that tendon stiffness is moderately related to contact time during a DJ [11].…”

Section: Introductionmentioning

confidence: 99%

No Association between Jump Parameters and Tissue Stiffness in the Quadriceps and Triceps Surae Muscles in Recreationally Active Young Adult Males

Konrad

Paternoster

2022

Applied Sciences

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While the main contributor for drop jump (DJ) performance is the calf muscle–tendon unit (MTU), for countermovement jump (CMJ) performance, it is the quadriceps MTU. However, to date, it is not clear if the muscle and/or tendon stiffness of the respective MTUs can be related to DJ or CMJ performance. Therefore, the purpose of this study was to investigate the relationships between DJ and CMJ performance parameters and tissue stiffness (i.e., muscle stiffness, tendon stiffness) of the calf MTU and quadriceps MTU, respectively. Consequently, with 16 healthy volunteers, the tissue stiffness of the gastrocnemius medialis (GM), gastrocnemius lateralis (GL) Achilles tendon (AT), vastus medialis (VM), vastus lateralis (VL), rectus femoris (RF), and patellar tendon (PT) were recorded with a Myoton device. Moreover, DJ and CMJ performances were assessed with a force plate. The alpha level was set to 0.05. Pearson correlation coefficients revealed no significant association between DJ performance and GM, GL, or AT stiffness (−0.07 to 0.24; p > 0.05). Similarly, no association was found between CMJ performance parameters and VM, VL, RF, or PT stiffness (−0.13–0.36; p > 0.05). According to our results, other variables, such as jump technique, body weight, or strength, were likely play a more important role in DJ and CMJ performance.

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Comparison between 6-week foam rolling intervention program with and without vibration on rolling and non-rolling sides

et al. 2022

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Relationship between resting medial gastrocnemius stiffness and drop jump performance

Cited by 16 publications

References 40 publications

Relationship Between Drop Jump Training–Induced Changes in Passive Plantar Flexor Stiffness and Explosive Performance

Relationship Between Drop Jump Training–Induced Changes in Passive Plantar Flexor Stiffness and Explosive Performance

No Association between Jump Parameters and Tissue Stiffness in the Quadriceps and Triceps Surae Muscles in Recreationally Active Young Adult Males

Comparison between 6-week foam rolling intervention program with and without vibration on rolling and non-rolling sides

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