Does clinically measured ankle plantar flexor muscle strength or weakness correlate with walking performance in healthy individuals?

Background and purpose Ankle function declines with age. The objective of this study was to investigate the association between ankle function and balance in older adults, with a focus on range of motion (ROM) and strength. Methods This was a cross-sectional study that included 88 healthy community-dwelling older adults. Ankle mobility was measured while bearing weight (lunge test) and not bearing weight. The plantar-flexor muscle strength was assessed using a hand-held dynamometer. Balance was measured in terms of dynamic balance and mobility (timed up and go test), monopodal and bipodal static balance with open and closed eyes (single-leg stand test and platform measures), and margins of stability (functional reach test). Linear correlation and multiple regression analyses were conducted with a 95% CI. Results and discussion Most participants had limited ankle mobility (n = 75, 86%). Weight-bearing ankle dorsiflexion ROM was the strongest predictor of dynamic balance and included general mobility and stability (Radj2 = [0.34]; β = [-0.50]). In contrast, plantar-flexor muscle strength was a significant predictor of static standing balance with open eyes (Radj2 = [0.16–0.2]; β = [0.29–0.34]). Overall, weight-bearing ankle dorsiflexion ROM was a more representative measure of balance and functional performance; however, a non-weight-bearing mobility assessment provides complementary information. Therefore, both measures can be used in clinical practice. Conclusion This study supports the concept that ankle mobility contributes to the performance of dynamic tasks, while the plantar-flexor muscle strength helps to develop a standing static balance. Identification of alterations in ankle function is warranted and may assist in the design of tailored interventions. These interventions can be used in isolation or to augment conventional balance training in order to improve balance performance in community-dwelling older adults.

Download Full-text

Effects of Vibration Rolling with and without Dynamic Muscle Contraction on Ankle Range of Motion, Proprioception, Muscle Strength and Agility in Young Adults: A Crossover Study

International Journal of Environmental Research and Public Health ◽

10.3390/ijerph17010354 ◽

2020 ◽

Vol 17 (1) ◽

pp. 354 ◽

Cited By ~ 2

Author(s):

Bo-Jhang Lyu ◽

Chia-Lun Lee ◽

Wen-Dien Chang ◽

Nai-Jen Chang

Keyword(s):

Young Adults ◽

Muscle Strength ◽

Muscle Contraction ◽

Range Of Motion ◽

Exercise Performance ◽

Plantar Flexion ◽

Ankle Dorsiflexion ◽

Plantar Flexor ◽

Flexor Muscle ◽

Warm Up

Vibration rolling (VR) has emerged as a self-myofascial release (SMR) tool to aid exercise performance when warming up. However, the benefits of VR on exercise performance when combined with dynamic muscle contraction are unclear. The purpose of this study was to investigate the immediate effects of the combination of VR with dynamic muscle contraction (DVR), VR, and static stretching (SS) during warm-up on range of motion (ROM), proprioception, muscle strength of the ankle, and agility in young adults. In this crossover design study, 20 recreationally active adults without musculoskeletal disorders completed three test sessions in a randomized order, with 48 h of rest between each session. Participants completed one warm-up intervention and its measurements on the same day; different warm-up interventions and measurements were performed on each of the three days. The measurements included ankle dorsiflexion and plantarflexion ROM, ankle joint proprioception, muscle strength, and agility. After DVR and VR intervention, ankle dorsiflexion ROM (both DVR and VR, p < 0.001), plantarflexion ROM (both DVR and VR, p < 0.001), plantar flexor muscle strength (DVR, p = 0.007; VR, p < 0.001), and agility (DVR, p = 0.016; VR, p = 0.007) significantly improved; after SS intervention, ankle dorsiflexion and plantar flexion ROM (dorsiflexion, p < 0.001; plantar flexion, p = 0.009) significantly improved, but muscle strength and agility were not enhanced. Compared with SS, DVR and VR significantly improved ankle plantar flexor muscle strength (p = 0.008 and p = 0.001, respectively). Furthermore, DVR significantly improved ankle dorsiflexion compared with VR (p < 0.001) and SS (p < 0.001). In conclusion, either DVR, VR, or SS increased ankle ROM, but only DVR and VR increased muscle strength and agility. In addition, DVR produced considerable increases in ankle dorsiflexion. These findings may have implications for warm-up prescription and implementation in both rehabilitative and athletic practice settings.

Download Full-text

Effects of a high-volume static stretching programme on plantar-flexor muscle strength and architecture

European Journal of Applied Physiology ◽

10.1007/s00421-021-04608-5 ◽

2021 ◽

Author(s):

Kaoru Yahata ◽

Andreas Konrad ◽

Shigeru Sato ◽

Ryosuke Kiyono ◽

Riku Yoshida ◽

...

Keyword(s):

Muscle Strength ◽

High Volume ◽

Plantar Flexor ◽

Static Stretching ◽

Flexor Muscle

Download Full-text

Acute Effect of Vibration Roller With and Without Rolling on Various Parts of the Plantar Flexor Muscle

Frontiers in Physiology ◽

10.3389/fphys.2021.716668 ◽

2021 ◽

Vol 12 ◽

Author(s):

Masatoshi Nakamura ◽

Shigeru Sato ◽

Ryosuke Kiyono ◽

Riku Yoshida ◽

Yuta Murakami ◽

...

Keyword(s):

Elastic Modulus ◽

Muscle Strength ◽

Athletic Performance ◽

Muscle Stiffness ◽

Plantar Flexor ◽

Flexor Muscle ◽

Jump Performance ◽

Muscle Belly ◽

Shear Elastic Modulus ◽

Passive Torque

A single use of a vibration foam roller likely increases the range of motion (ROM) without decreasing muscle strength and athletic performance. However, to date, no study compared the effects of a vibration roller with and without rolling on various parts of the plantar flexor muscle. Therefore, this study aimed to compare the effects of the vibration foam roller with rolling or without rolling at the muscle-tendon junction (MTJ) or the muscle belly on dorsiflexion (DF) ROM, passive torque at DF ROM, shear elastic modulus, muscle strength, and jump performance. Fifteen healthy young males performed the following three conditions: (1) vibration rolling over the whole muscle-tendon unit, (2) static vibration on muscle belly, and (3) static vibration on MTJ for three-set 60-s vibration in random order. In this study, DF ROM, passive torque, shear elastic modulus, muscle strength, and single-leg drop jump were measured before and immediately after the interventions. The DF ROM and passive torque at DF ROM were increased after all three conditions, whereas the shear elastic modulus was decreased after vibration rolling and static vibration on the muscle belly, but not following static vibration of the MTJ. In addition, there were no significant changes in muscle strength and jump performance in any group. Our results showed that vibration with rolling or static vibration on muscle belly could be effective to improve ROM and muscle stiffness without adverse effects of muscle strength and athletic performance.

Download Full-text

Hypertrophy of chronically unloaded muscle subjected to resistance exercise

Journal of Applied Physiology ◽

10.1152/japplphysiol.01051.2003 ◽

2004 ◽

Vol 96 (4) ◽

pp. 1451-1458 ◽

Cited By ~ 79

Author(s):

P. A. Tesch ◽

J. T. Trieschmann ◽

A. Ekberg

Keyword(s):

Muscle Strength ◽

Resistance Exercise ◽

Lower Limb ◽

Weight Bearing ◽

Knee Extensor ◽

Extensor Muscle ◽

Muscle Volume ◽

Electromyographic Activity ◽

Plantar Flexor ◽

Flexor Muscle

In an effort to simulate the compromised function and atrophy of lower limb muscles experienced by astronauts after spaceflight, 21 men and women age 30-56 yr were subjected to unilateral lower limb unloading for 5 wk. Whereas 10 of these subjects performed unilateral knee extensor resistance exercise (ULRE) two or three times weekly, 11 subjects (UL) refrained from training. The exercise regimen consisted of four sets of seven maximal actions, using an apparatus that offers concentric and eccentric resistance by utilizing the inertia of rotating flywheel(s). Knee extensor muscle strength was measured before and after UL and ULRE, and knee extensor and ankle plantar flexor muscle volumes were determined by means of magnetic resonance imaging. Surface electromyographic activity measured after UL inferred increased muscle use to perform a given motor task. UL induced an 8.8% decrease ( P < 0.05) in knee extensor muscle volume. After ULRE and as a result of only ∼16 min of maximal contractile activity over the 5-wk course, muscle volume increased 7.7% ( P < 0.05). Muscle strength decreased 24-32% ( P < 0.05) in response to UL. Group ULRE showed maintained ( P > 0.05) strength. Ankle plantar flexor muscle volume of the unloaded limb decreased ( P < 0.05) in both groups (UL 10.5%; ULRE 11.1%). In neither group did the right weight-bearing limb show any change ( P > 0.05) in muscle volume or strength. The results of this study provide evidence that resistance exercise not only may offset muscle atrophy but is in fact capable of promoting marked hypertrophy of chronically unloaded muscle.

Download Full-text

Knee flexor muscle strength is related to gait performance in women with multiple sclerosis but not for healthy women

10.26226/morressier.59a3e8b7d462b8028d8958a3 ◽

2017 ◽

Author(s):

Cintia Ramari

Keyword(s):

Multiple Sclerosis ◽

Muscle Strength ◽

Flexor Muscle ◽

Gait Performance ◽

Knee Flexor ◽

Healthy Women

Download Full-text

Força dos Músculos Rotadores do Ombro em Indivíduos Saudáveis/ Rotator Cuff Muscle Strength in Healthy Individuals

REVISTA CIÊNCIAS EM SAÚDE ◽

10.21876/rcsfmit.v1i1.19 ◽

1970 ◽

Vol 1 (1) ◽

pp. 78-82

Author(s):

Paulo José Oliveira Cortez ◽

José Elias Tomazini ◽

Mauro Gonçalves

Keyword(s):

Rotator Cuff ◽

Muscle Strength ◽

Internal Rotation ◽

Upper Limb ◽

Statistical Difference ◽

External Rotation ◽

Healthy Individuals ◽

Average Strength ◽

Strength Tests ◽

The Right

Introdução: A diminuição da capacidade de exercer esforços por parte dos músculos rotadores pode criar uma variedade de problemas. O conhecimento preciso do nível de força muscular de um indivíduo é importante, tanto para a avaliação da capacidade funcional ocupacional, como para uma apropriada prescrição de exercícios atléticos e de reabilitação. Percebe-se escassez de informação sobre as articulações do ombro, bem como os fatores envolvidos na força muscular dessa região. O objetivo deste estudo foi comparar a força gerada pelos músculos do manguito rotador entre o membro superior direito e o membro superior esquerdo em indivíduos saudáveis. Métodos: Participaram do estudo 22 sujeitos do sexo masculino, com idade de 18 e 19 anos, militares, saudáveis e sem história clínica de patologia ortopédica ou qualquer tipo de lesão no sistema musculoesquelético. Foram aplicados dois testes de força: Rotação Interna e Rotação Externa. Resultado : A força média de rotação interna no membro superior direito (MSD) foi maior que a força média de rotação interna no membro superior esquerdo (MSE) (p=0,723) e a força de rotação externa no MSD foi menor que a força média de rotação externa no MSE (p=0,788). Não houve diferença estatística na comparação dos valores de força de todos os testes de força isométrica. Conclusão: Para amostra estudada e metodologia utilizada na avaliação da força muscular, não houve diferença estatística na comparação da força gerada pelos músculos do manguito rotador do membro superior direito e do membro superior esquerdo.Rotator Cuff Muscle Strength in Healthy Individuals Introduction: Decreased ability to exert efforts by the rotator muscles can create a variety of problems. The precise knowledge of the level of muscular strength of an individual is important for both the functional capacity evaluation for occupational as an appropriate exercise prescription and rehabilitation of athletic. It is perceived scarcity of information on the shoulder joints as well as factors involved in muscle strength in this region. Objective: Develop a device for measuring the strength generated by the muscles of the upper limbs and the verification of efficiency and adaptability of this device through a comparative study of muscle strength in healthy subjects. Methods: The study included 22 male subjects, aged 18 and 19 years, military personnel, body mass between 57.7 and 93 kg (71.8 ± 9.45 kg) and height between 1.67 and 1.90 m (1.75 ± 0.06 m), healthy and without a history of orthopaedic disease or any kind of damage to the musculoskeletal system. Three strength tests were applied: Internal Rotation and External Rotation. For each type of effort three maximum voluntary contractions were required for 10 seconds, with an interval of 30 seconds between each contraction. Results: Internal rotation in the right upper limb (RUL) was higher than the average strength of internal rotation in the left upper limb (LUL) (p = 0, 723) and the external rotation strength in RUL was lower than the average strength of external rotation in the LUL (p=0,788). No statistical difference in comparing the strength values of all isometric strength tests. Conclusion: For sample and methodology used to assess muscle strength, there was no statistical difference in comparing the force generated by the muscles of the rotator cuff of the right and left upper limb.

Download Full-text

Plantar flexor muscle stretching depresses the soleus late response but not tendon tap reflexes

European Journal of Neuroscience ◽

10.1111/ejn.15178 ◽

2021 ◽

Author(s):

Timothy S. Pulverenti ◽

Gabriel S. Trajano ◽

Benjamin J. C. Kirk ◽

Vanesa Bochkezanian ◽

Anthony J. Blazevich

Keyword(s):

Late Response ◽

Plantar Flexor ◽

Flexor Muscle ◽

Muscle Stretching ◽

Tendon Tap

Download Full-text