The effect of a running task on muscle shear elastic modulus of posterior lower leg

Ohya, Shuhei; Nakamura, Masatoshi; Aoki, Takafumi; Suzuki, Daichi; Kikumoto, Takanori; Nakamura, Emi; Ito, Wataru; Hirabayashi, Ryo; Takabayashi, Tomoya; Edama, Mutsuaki

doi:10.1186/s13047-017-0238-x

Cited by 17 publications

(20 citation statements)

References 31 publications

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“…Some 14 weeks of resistance training intervention resulted in a 16% increase in triceps surae aponeurosis stiffness ( Albracht and Arampatzis, 2013 ). However, inconsistent with our results, 20 healthy participants were recruited to measure the elastic modulus of the calf muscles using shear wave elastography at the beginning and end of a 30-min running task, and they found no significant change in the LG and MG after the exercise ( Ohya et al, 2017 ). In that study, the participants were asked to perform a 30-min running task.…”

Section: Discussioncontrasting

confidence: 98%

Stiffness of the Gastrocnemius–Achilles Tendon Complex Between Amateur Basketball Players and the Non-athletic General Population

Chang

Wang

et al. 2020

Front. Physiol.

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Muscle and tendon stiffness are related to sports performance, tendinopathy, and tendon degeneration. However, the effects of habitual loading on muscle and tendon mechanical properties are unclear. Using amateur basketball players as examples, we investigated the effects of mechanical loading on the stiffness of the gastrocnemius–Achilles tendon (AT) complex in non-dominant and dominant lower limbs. Then, we evaluated the correlation between gastrocnemius and AT stiffness. Forty participants (20 amateur basketball players; 20 normal non-athletic persons) were recruited for this study. Stiffness of the gastrocnemius–AT complex was assessed using MyotonPRO at neutral position and 10° dorsiflexion of the ankle joint in participants from amateur basketball players and the non-athletic general population. Our results showed a greater stiffness of the gastrocnemius–AT complex in amateur basketball players than that in healthy non-athletic subjects at neutral position and 10° dorsiflexion of the ankle joint (P < 0.05). No significant difference in stiffness was found between the non-dominant and dominant lower limbs either in amateur basketball players or in generally healthy subjects (P > 0.05). A significant positive correlation was obtained between stiffness of the AT and medial gastrocnemius (MG) in amateur basketball players (neutral position: r = 0.726 and P = 0.001; dorsiflexion 10°: r = 0.687 and P = 0.001). The amateur basketball players exhibit significantly higher stiffness value in Achilles and gastrocnemius. This is possibly caused by repeated training effects. The symmetric stiffness of the AT and gastrocnemius exists both in amateur basketball players and generally healthy subjects. A significant correlation between the AT and the MG was found in amateur basketball players.

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Section: Discussioncontrasting

confidence: 98%

Stiffness of the Gastrocnemius–Achilles Tendon Complex Between Amateur Basketball Players and the Non-athletic General Population

Chang

Wang

et al. 2020

Front. Physiol.

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“…Stiffness of the gastrocnemius reportedly has a strong correlation with plantar fasciitis [23]. Moreover, patients with a history of medial tibial stress syndrome had stiff FDLs [17] and increased stiffness of the FDL after running [16]. These results are similar to those of the our study, which show an increase in the stiffness of muscles related to running injuries.…”

Section: Discussionsupporting

confidence: 90%

“…Long distance running tends to decrease the height of the medial longitudinal arch, and to reduce arch exibility [14,15]. Moreover, the stiffness of the dynamic stabilizers of the arch, such as the tibialis posterior and the FDL, is increased after running [16,17]. However, the effects of the structure and exibility of the arch on changes in muscle stiffness after running are unclear.…”

Section: Resultsmentioning

confidence: 99%

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Relationship Between Foot Flexibility and Leg Muscle Stiffness After Running: a Cross-sectional Study

Kudo¹

2020

Preprint

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BackgroundDeformation of the foot is related to the development of running injuries. The prevention of running injuries requires the management of changes in leg muscle stiffness after running. However, the relationship of muscle stiffness and the structure and flexibility of the foot arch is unclear. The purpose of this study was to investigate differences in muscle stiffness and flexibility of the arch before and after running.MethodsTwenty lower limbs of 10 healthy volunteers were enrolled. All of the subjects performed the same running task on a treadmill set at an incline of 7%, running at a speed of 8 km/h for 60 min. The shear elastic modulus of the longitudinal axis of the medial and lateral gastrocnemius (MG, LG), flexor digitorum longus (FDL), and abductor hallucis muscles were measured both before and after running using ultrasound shear wave elastography. Arch height index (AHI) and arch height flexibility (AHF) were measured at 10, 50, and 90% of the body weight loaded position, respectively. The correlation of AHI, AHF, and alterations in each muscle stiffness before and after running was assessed using Spearman’s rank correlation coefficient.ResultsThe FDL, LG, and MG were significantly harder after running than before running. The AHI and AHF had no significantly difference between before and after running. There were significant moderate correlations between AHF50 before running and stiffness of the FDL after running.ConclusionIncreased stiffness of the FDL is related to medial tibial stress syndrome. Our results indicate that stiffness of the arch is associated with greater stiffness of the FDL, which restricts performance of the dynamic function of stretching the muscle and tendon complex of the toe flexor with weight loading on the foot.

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“…It is speculated that excessive motion of the rearfoot leads to higher eccentric contraction level of these muscles and produces higher stress on the medial tibia. A previous study showed that running for 30 min increased the tibialis posterior and flexor digitorum longus stiffness [28]. Also, runners with an MTSS history demonstrated higher tibialis posterior and flexor digitorum longus stiffness than that in no MTSS history [29].…”

Section: Discussionmentioning

confidence: 86%

Difference in the Foot Intersegmental Coordination Pattern Between Female Lacrosse Players With and Without a History of Medial Tibial Stress Syndrome: a Cross-sectional Study

Akuzawa¹,

Oshikawa²,

Nakamura³

et al. 2020

Preprint

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Background Medial tibial stress syndrome is a common sports related injury. Altered foot kinematics can be a risk factor for the injury. Since foot segments can move independently, intersegment coordination is important for proper foot function. This study aimed to compare the foot intersegmental coordination pattern and single segment kinematics between women lacrosse players with and without a history of medial tibial stress syndrome during drop jump. Methods Nine players with a medial tibial stress syndrome history and 12 players with no history were enrolled. Foot kinematics, including angle at landing and peak angle and excursion at the rearfoot, midfoot, and forefoot during single-leg drop jumps were analyzed. Each segment motion data from landing to leaping was time-scaled to 100% to analyze the intersegmental coordination with a modified vector coding technique. Instant intersegmental coordination of every 1% was classified into four patterns (in-phase, two segments rotate in the same direction with similar amplitudes; anti-phase, two segments rotate in opposite directions; proximal phase, proximal segment dominantly rotates in the same direction compared to the distal segment; and distal phase, distal segment dominantly rotates in the same direction compared to the proximal segment). The percentage of intersegmental coordination pattern and kinematics in each segment were compared between the groups using the Student’s t test. Results Groups with a history of medial stress syndrome showed a significantly higher percentage of proximal phase between the rearfoot and midfoot in the sagittal (Mean ± SD; history, 52.0 ± 18.5%, no history, 29.3 ± 16.7%; p = 0.005) and coronal planes (history, 43.0 ± 26.1%, no history, 15.9 ± 9.1%; p = 0.008). Dorsiflexion excursion (history, 34.8 ± 4.7°, no history, 29.6 ± 2.1°; p = 0.002) were significantly larger in a history of medial tibial stress syndrome group compared to no history group. Conclusions Rearfoot dominant motion pattern relative to the midfoot may be related to medial tibial stress syndrome. Intersegmental coordination analysis may be useful for detecting abnormal foot coordination patterns.

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The effect of a running task on muscle shear elastic modulus of posterior lower leg

Cited by 17 publications

References 31 publications

Stiffness of the Gastrocnemius–Achilles Tendon Complex Between Amateur Basketball Players and the Non-athletic General Population

Stiffness of the Gastrocnemius–Achilles Tendon Complex Between Amateur Basketball Players and the Non-athletic General Population

Relationship Between Foot Flexibility and Leg Muscle Stiffness After Running: a Cross-sectional Study

Difference in the Foot Intersegmental Coordination Pattern Between Female Lacrosse Players With and Without a History of Medial Tibial Stress Syndrome: a Cross-sectional Study

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