Investigation into the relationship between the passive flexibility and active stiffness of the ankle plantar-flexor muscles

Hunter, David G.; Spriggs, J.

doi:10.1016/s0268-0033(00)00017-6

Cited by 38 publications

(29 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Using the procedures described in the literature (Faria et al, 2009a, Faria et al, 2010, Hunter and Spriggs, 2000, the triceps surae musculo-articular stiffness was calculated for each of the two trials and the mean was calculated. The musculo-articular stiffness (k) was calculated from the free oscillation data using Eq.…”

Section: Discussionmentioning

confidence: 99%

“…The oscillations produced at the ankle-foot (plantarflexion/dorsiflexion) were registered and used to assess the musculo-articular stiffness. Participants were prevented from seeing the application of the impulse and were instructed not to react to any stimulus (Faria et al, 2009a, Faria et al, 2010, Hunter and Spriggs, 2000. The impulses were applied randomly to prevent participants from anticipating the impulses.…”

Section: Free Oscillation Data Measurementmentioning

confidence: 99%

See 1 more Smart Citation

Mechanical properties of the triceps surae: Differences between football and non-football players

Faria

Gabriel

Abrantes

et al. 2013

Journal of Sports Sciences

View full text Add to dashboard Cite

We investigated the mechanical properties of the triceps surae between professional, junior, and nonfootball players. Fifty-nine men participated in this study. The mechanical properties of the right legs' triceps surae were measured in vivo using a free oscillation technique; no significant differences existed between the groups. The mean results for musculo-articular stiffness, damping coefficient, and damping ratio were as follows: professional football players (21523 N.m Thus, football training, football games, and the position played had no effect on triceps surae mechanical properties. These results may be attributed to opposing adaptations between different types of training that are usually implemented in football. Alternatively, the minimum strain amplitude and/or frequency threshold of the triceps surae required to trigger adaptations of mechanical properties might not be achieved by football players with football training and matches.3

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Free Oscillation Data Measurementmentioning

confidence: 99%

Mechanical properties of the triceps surae: Differences between football and non-football players

Faria

Gabriel

Abrantes

et al. 2013

Journal of Sports Sciences

View full text Add to dashboard Cite

show abstract

“…This passive tension effect of muscle is created by the parallel elastic component of the tissue and anatomically includes the fascia that surrounds the fibers and the muscle itself. 21,35,36 The largest difference in stiffness was found between the knee flexed to 906 and to 06 with the ankle in 06 of PF. At 06 of PF, the hindfoot likely maintained tension on the Achilles tendon, and when the knee was positioned at 06 of flexion, the ankle complex was tightened.…”

Section: Effects Of Knee Positioningmentioning

confidence: 95%

Knee and Ankle Position, Anterior Drawer Laxity, and Stiffness of the Ankle Complex

Kovaleski

Norrell

Heitman

et al. 2008

Journal of Athletic Training

View full text Add to dashboard Cite

Context: Anterior drawer testing of the ankle is commonly used to diagnose lateral ligamentous instability. Our hypothesis was that changing knee and ankle positions would change the stability of the ankle complex during anterior drawer testing.Objectives: To assess the effects of knee and ankle position on anterior drawer laxity and stiffness of the ankle complex.Design: A repeated-measures design with knee and ankle position as independent variables.Setting: University research laboratory.Patients or Other Participants: Bilateral ankles of 10 female (age 5 19.8 6 1.1 years) and 10 male (age 5 20.8 6 1.2 years) collegiate athletes were tested.Intervention ( Results: Anterior laxity of the ankle complex was maximal with the knee positioned at 906 of flexion and the ankle at 106 of PF when compared with the knee positioned at 06 of flexion and the ankle at 106 or 06 of PF (P , .001), whereas ankle complex stiffness was greatest with the knee positioned at 06 of flexion and the ankle at 06 of PF (P , .009).Conclusions: Anterior drawer testing of the ankle complex with the knee positioned at 906 of flexion and the ankle at 106 of PF produced the most laxity and the least stiffness. These findings indicate that anterior drawer testing with the knee at 906 of flexion and the ankle at 106 of PF may permit better isolation of the ankle capsuloligamentous structures.Key Words: lateral ankle sprains, physical examination Key PointsN Differences in ankle laxity and stiffness during anterior drawer loading of the ankle complex were found in various knee and ankle positions.N Alterations in the passive tension characteristics acting through the Achilles tendon complex and the ankle capsuloligamentous structures should be considered when assessing ankle ligament laxity.

show abstract

“…1,11,18,19,24 Lower leg segment anthropometric data were used to obtain lower leg and foot mass and center of mass. 25 With these data, joint stiffness was calculated using the damped frequency of lower leg oscillation of the first 2 oscillatory peaks and the coefficient of damping (Appendix A).…”

Section: Instrumentationmentioning

confidence: 99%

Joint Stiffness and Pain in Individuals With Patellofemoral Syndrome

Hamstra-Wright¹,

Swanik²,

Ennis³

et al. 2005

J Orthop Sports Phys Ther

View full text Add to dashboard Cite

Study Design: Pretest-posttest matched control group design. Objectives: To measure passive knee joint stiffness and pain in participants with and without patellofemoral pain syndrome (PFPS) and to determine the relationship between mechanical knee joint stiffness, self-reported stiffness, and pain. Background: Patients with PFPS complain of knee joint stiffness and pain, but no research has quantified both of these characteristics in this population. Methods and Measures: Twenty-eight individuals (14 with PFPS [mean age ± SD, 25.5 ± 4.8 years] and 14 healthy controls [mean age ± SD, 22.8 ± 5.4 years]) volunteered for this study. Mechanical passive knee joint stiffness was calculated using the damped natural frequency of oscillation of the lower leg while sitting. Mechanical stiffness was compared to self-reports of knee stiffness and pain. All measurements were recorded presitting and after 20 minutes of sitting. Results: Sitting for 20 minutes did not induce significant changes in mechanical knee joint stiffness. However, participants with PFPS reported significantly greater (P Ͻ .01) knee stiffness after sitting for 20 minutes. A significant correlation (r = 0.70, P Ͻ .01) was found between self-reported stiffness and pain in participants with PFPS; however, no significant relationship was observed between mechanical and self-reported knee joint stiffness. Conclusions: Despite frequent complaints of joint stiffness, the knees of individuals with PFPS do not appear physiologically stiffer than those of control subjects. Individuals with PFPS perceive increased knee stiffness after sitting, but may misinterpret the sensation of pain as joint stiffness. J Orthop Sports Phys Ther 2005;35:495-501.

show abstract

Investigation into the relationship between the passive flexibility and active stiffness of the ankle plantar-flexor muscles

Cited by 38 publications

References 25 publications

Mechanical properties of the triceps surae: Differences between football and non-football players

Mechanical properties of the triceps surae: Differences between football and non-football players

Knee and Ankle Position, Anterior Drawer Laxity, and Stiffness of the Ankle Complex

Joint Stiffness and Pain in Individuals With Patellofemoral Syndrome

Contact Info

Product

Resources

About