Dynamically adjustable foot-ground contact model to estimate ground reaction force during walking and running

Jung, Yihwan; Jung, Moonki; Ryu, Jiseon; Yoon, Sukhoon; Park, Sang-Kyoon; Koo, Seungbum

doi:10.1016/j.gaitpost.2016.01.005

Cited by 48 publications

(45 citation statements)

References 28 publications

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“…For ground reaction force, the peaks of forces in sagittal plane and frontal plane occurred at 20%, 43% and 73% of stance phase cycle which were consist with the finding of Lundgren, Giakas and Jung [28,30,31]. In Giakas's research [30], sagittal plane ground reaction force was within the range of 1.06~1.17 BW while the result of this paper was within 1.1~1.14 BW.…”

Section: Discussionsupporting

confidence: 79%

Biomechanical Analysis of Achilles Tendon Stretch And Plantar Fascia Stretch In Plantar Fasciitis Treatment

Hu¹,

Wang²,

Yang³

et al. 2017

Proceedings of the 3rd Annual International Conference on Mechanics and Mechanical Engineering (MME 2016)

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Abstract. This paper aims to simulate two stretching methods adopted in plantar fasciitis treatment in MSC.ADAMS, Achilles tendon stretch and plantar fascia stretch. Clinical evidence has been accumulated that stretching is effective in relieving heel pain caused by plantar fasciitis. While plantar fascia stretching is conceived to be more effective than the traditional Achilles tendon stretch, the reason leading to this difference has not been identified yet. A multi-segment foot model consisted of ligaments, plantar fascia, plantar soft tissue was constructed and then validated by comparing the ground reaction forces and joint rotation angles obtained in a gait simulation with previous research results. The model was then applied in finding out the root cause in these two stretching methods by analysing the deformation of plantar fascia. Achilles tendon stretch was performed to collect kinematic data of tibia using NDI, which was used to drive the simulation. In the plantar fascia stretch, a rotational plate was placed beneath the fore-foot and had a range of motion from 0° to 20°. The forefoot was supported and lifted to simulate the stretching process. Deformation of the plantar fascia under two stretching methods were compared. The result shows that average deformation in Achilles tendon is smaller than that of plantar fascia stretch which may cause the therapeutic difference between these two stretch methods. This analysis method could also be applied in refining physical therapy treatment.

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Section: Discussionsupporting

confidence: 79%

Biomechanical Analysis of Achilles Tendon Stretch And Plantar Fascia Stretch In Plantar Fasciitis Treatment

Hu¹,

Wang²,

Yang³

et al. 2017

Proceedings of the 3rd Annual International Conference on Mechanics and Mechanical Engineering (MME 2016)

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“…The curve of GRF had two peaks in the stance phase when running at low speed, corresponding to heel strike and toe off. With increasing the speed, the GRF peak of heel strike will disappear [ 30 ]. A relatively high speed was applied in the treadmill countermeasure, which may lead to non-heel-striking running.…”

Section: Discussionmentioning

confidence: 99%

Effect of Constraint Loading on the Lower Limb Muscle Forces in Weightless Treadmill Exercise

Guo

Fan

Yan-ru

et al. 2018

Journal of Healthcare Engineering

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Long exposure to the microgravity will lead to muscle atrophy and bone loss. Treadmill exercise could mitigate the musculoskeletal decline. But muscle atrophy remains inevitable. The constraint loading applied on astronauts could affect the muscle force and its atrophy severity. However, the quantitative correlation between constraint loading mode and muscle forces remains unclear. This study aimed to characterize the influence of constraint loading mode on the lower limb muscle forces in weightless treadmill exercise. The muscle forces in the full gait cycle were calculated with the inverse dynamic model of human musculoskeletal system. The calculated muscle forces at gravity were validated with the EMG data. Muscle forces increased at weightlessness compared with those at the earth's gravity. The increasing percentage from high to low is as follows: biceps femoris, gastrocnemius, soleus, vastus, and rectus femoris, which was in agreement with the muscle atrophy observed in astronauts. The constraint loading mode had an impact on the muscle forces in treadmill exercise and thus could be manipulated to enhance the effect of the muscle training in spaceflight. The findings could provide biomechanical basis for the optimization of treadmill constraint system and training program and improve the countermeasure efficiency in spaceflight.

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“…Lateral trunk sway will be calculated using trunk sway in relation to the pelvis [ 45 ]. Peak GRF during gait will be calculated and normalized to body weight [ 46 , 47 ]. Given that GRF and kinematics are velocity-dependent, walking parameters will be collected at two walking velocities, self-selected comfortable velocity and a standard velocity (1.5 m/s) [ 48 ].…”

Section: Methodsmentioning

confidence: 99%

Exercise intervention for unilateral amputees with low back pain: study protocol for a randomised, controlled trial

Wasser

Herman

Horodyski

et al. 2017

Trials

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BackgroundAtraumatic lower limb amputation is a life-changing event for approximately 185,000 persons in the United States each year. A unilateral amputation is associated with rapid changes to the musculoskeletal system including leg and back muscle atrophy, strength loss, gait asymmetries, differential mechanical joint loading and leg length discrepancies. Even with high-quality medical care and prostheses, amputees still develop secondary musculoskeletal conditions such as chronic low back pain (LBP). Resistance training interventions that focus on core stabilization, lumbar strength and dynamic stability during loading have strong potential to reduce LBP and address amputation-related changes to the musculoskeletal system. Home-based resistance exercise programs may be attractive to patients to minimize travel and financial burdens.Methods/designThis study will be a single-assessor-blinded, pre-post-test randomised controlled trial involving 40 men and women aged 18–60 years with traumatic, unilateral transtibial amputation. Participants will be randomised to a home-based, resistance exercise group (HBRX) or a wait-list control group (CON). The HBRX will consist of 12 weeks of elastic resistance band and bodyweight training to improve core and lumbopelvic strength. Participants will be monitored via Skype or Facetime on a weekly basis. The primary outcome will be pain severity (11-point Numerical Pain Rating Scale; NRSpain). Secondary outcomes will include pain impact on quality of life (Medical Outcomes Short Form 36, Oswestry Disability Index and Roland Morris Disability Questionnaire), kinematics and kinetics of walking gait on an instrumented treadmill, muscle morphology (muscle thickness of multifidus, transversus abdominis, internal oblique), maximal muscle strength of key lumbar and core muscles, and daily step count.DiscussionThe study findings will determine whether a HBRX program can decrease pain severity and positively impact several physiological and mechanical factors that contribute to back pain in unilateral transtibial amputees with chronic LBP. We will determine the relative contribution of the exercise-induced changes in these factors on pain responsiveness in this population.Trial registrationClinicalTrials.gov, ID: NCT03300375. Registered on 2 October 2017.Electronic supplementary materialThe online version of this article (doi:10.1186/s13063-017-2362-0) contains supplementary material, which is available to authorized users.

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Dynamically adjustable foot-ground contact model to estimate ground reaction force during walking and running

Cited by 48 publications

References 28 publications

Biomechanical Analysis of Achilles Tendon Stretch And Plantar Fascia Stretch In Plantar Fasciitis Treatment

Biomechanical Analysis of Achilles Tendon Stretch And Plantar Fascia Stretch In Plantar Fasciitis Treatment

Effect of Constraint Loading on the Lower Limb Muscle Forces in Weightless Treadmill Exercise

Exercise intervention for unilateral amputees with low back pain: study protocol for a randomised, controlled trial

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