The trampoline aftereffect: the motor and sensory modulations associated with jumping on an elastic surface

Márquez, Gonzalo; Jódar, Xavier Aguado; Alegre, Luis M.; Lago, Ángel; Acero, Rafael Martín; Fernández-del-Olmo, Miguel

doi:10.1007/s00221-010-2324-1

Cited by 17 publications

(22 citation statements)

References 36 publications

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“…The observation that repeated jumping on an elastic surface leads to after effects when subjects are tested on solid ground afterwards (Márquez et al . ) strengthens the hypothesis that the central motor command is adapted surface specifically. However, to date, it is not clear how the CNS fulfils this task.…”

supporting

confidence: 82%

Effect of surface stiffness on the neural control of stretch‐shortening cycle movements

et al. 2014

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Aim: It is accepted that leg stiffness (K leg ) increases when surface stiffness decreases, and vice versa. However, little is known how the central nervous system fulfils this task. To understand the effect of surface stiffness on the neural control of stretch-shortening cycle movements, this study aimed to compare modulation of spinal and corticospinal excitability at distinct phases after ground contact during two-legged hopping when changing from solid to elastic ground. Methods: Motor-evoked potentials (MEPs) induced by transcranial magnetic stimulation (TMS) and H-reflexes were elicited at the time of the short (SLR)-, medium (MLR)-and long (LLR)-latency responses of the soleus muscle (SOL) during two-legged hopping on different stiffness surfaces, elastic and stiff. Results: Soleus H-reflexes during two-legged hopping on the elastic surface were lower at SLR and larger at LLR than on the stiff surface (P < 0.05 for both comparisons). SOL MEP size was higher at the time of SLR during hopping on the elastic surface than on the stiff surface (P < 0.05) although the background EMG was similar. Conclusion: It is argued that this phase-specific adaptation in spinal reflex excitability is functionally relevant to adjust leg stiffness to optimally exploit the properties of the elastic surface. Thus, the increased corticospinal excitability on the elastic surface may reflect a more supraspinal control of the ankle muscles to compensate the decrease in reflexive stiffness at the beginning of touchdown and/or counteract the higher postural challenges associated with the elastic surface. Keywords H-reflex, leg stiffness, stretch-shortening cycle, transcranial magnetic stimulation.The neural control of stretch-shortening cycle (SSC) movements such as drop jumps, two-legged hopping, or running is highly complex incorporating feedforward (pre-programmed) and feedback (reflex) control (Taube et al. 2012a). Thus, multiple hierarchical levels of the central nervous system (CNS) have to closely interact to adjust neural control task (Leukel et al. 2008a) and context specifically (Leukel et al. 2008a(Leukel et al. , 2012 taking into account the biomechanical constraints of the human body. The CNS is therefore challenged to optimally exploit the capacity of the tendomuscular system to store kinetic energy during 1 Published in which should be cited to refer to this work.http://doc.rero.ch the eccentric phase (touchdown), which can subsequently be released in the concentric phase (push-off) without exposing the body to the risk of being overloaded. It was previously demonstrated that the CNS can adjust the recoil properties of the tendomuscular system in various ways at different times of the SSC movement; for instance Arampatzis et al. (2001) showed that the level of pre-activation (muscular activity before touchdown) is related to the stiffness of the lower extremity. Furthermore, the reflex-induced activity shortly after touchdown can be modulated. Several studies observed reduced H-reflex activity with increasing d...

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supporting

confidence: 82%

Effect of surface stiffness on the neural control of stretch‐shortening cycle movements

et al. 2014

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“…[25] They needed to exert muscle force and neuromuscular responses to stiffen their legs in order to overcome the unstable conditions. [28]…”

Section: Discussionmentioning

confidence: 99%

“…[28] When walking or jumping, the human musculoskeletal system can modify its stiffness in response to the physical characteristics of the surface. [29] Improved leg stiffness due to exercise on an elastic surface could decrease the average muscle force required for exercise activity by increasing the external force produced by the elastic surface.…”

Section: Discussionmentioning

confidence: 99%

“…[29] Improved leg stiffness due to exercise on an elastic surface could decrease the average muscle force required for exercise activity by increasing the external force produced by the elastic surface. [28] The elastic surface of the mini-trampoline in the current study was made from polypropylene; such material could support and distribute plantar pressure while subjects were standing and walking on its surface. As a result, subjects could improve their dynamic stability after the exercise training program.…”

Section: Discussionmentioning

confidence: 99%

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Effects of weight-bearing exercise on a mini-trampoline on foot mobility, plantar pressure and sensation of diabetic neuropathic feet; a preliminary study

Kanchanasamut

Pensri

2017

Diabetic Foot & Ankle

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Objective: Foot and ankle exercise has been advocated as a preventative approach in reducing the risk of foot ulceration. However, knowledge about the appropriate types and intensity of exercise program for diabetic foot ulcer prevention is still limited. The current study aimed to examine the effects of an eight-week mini-trampoline exercise on improving foot mobility, plantar pressure and sensation of diabetic neuropathic feet. Methods: Twenty-one people with diabetic peripheral neuropathy who had impaired sensation perception were divided into two groups. The exercise group received a foot-care education program plus an eight-week home exercise program using the mini-trampoline (n = 11); whereas a control group received a foot-care education only (n = 10). Measurements were undertaken at the beginning, at the completion of the eight-week program and at a 20-week follow-up. Results: Both groups were similar prior to the study. Subjects in the exercise group significantly increased the range of the first metatarsophalangeal joint in flexion (left: p = 0.040, right: p = 0.012) and extension (left: p = 0.013) of both feet more than controlled subjects. There was a trend for peak plantar pressure at the medial forefoot to decrease in the exercise group (p = 0.016), but not in the control group. At week 20, the number of subjects in the exercise group who improved their vibration perception in their feet notably increased when compared to the control group (left: p = 0.043; right: p = 0.004). Conclusions: This is a preliminary study to document the improvements in foot mobility, plantar pressure and sensation following weight-bearing exercise on a flexible surface in people with diabetic neuropathic feet. Mini-trampoline exercise may be used as an adjunct to other interventions to reduce risk of foot ulceration. A larger sample size is needed to verify these findings. This trial is registered with COA No. 097.2/55.

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“…These after-effects reflect adjustments in an internal model of the elastic surface that carries over into movements produced on the stiff surface. 30 It is very important that the mini-trampoline training situation be as safe as possible. At the same time foot splints are, if necessary, advisable.…”

Section: Discussionmentioning

confidence: 99%

Effects of a predefined mini-trampoline training programme on balance, mobility and activities of daily living after stroke: a randomized controlled pilot study

et al. 2013

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Objective: To investigate the effects of a predefined mini-trampoline therapy programme for increasing postural control, mobility and the ability to perform activities of daily living after stroke. Design: Randomized non-blinded controlled pilot study. Setting: Neurological rehabilitation hospital. Subjects: First-time stroke; age 18-80 years; independent standing ability for a minimum of 2 minutes. Intervention: Patients were randomized into two groups: the mini-trampoline group (n = 20) received 10 sessions of balance training using the mini-trampoline over three weeks. The patients of the control group (n =20) participated 10 times in a group balance training also over three weeks. Main measures: Postural control (Berg Balance Scale, BBS), mobility and gait endurance (timed 'up and go' test, TUG; 6-minute walk test, 6MWT) and the ability to perform activities of daily living (Barthel Index, BI). Measurements were undertaken prior to and after the intervention period. Results: Both groups were comparable before the study. The mini-trampoline group improved significantly more in the BBS (P = 0.003) compared to the control group. Mean or median differences of both groups showed improvements in the TUG 10.12 seconds/7.23 seconds, the 6MWT 135 m/75 m and the BI 20 points/13 points for the mini-trampoline and control group, respectively. These outcome measurements did not differ significantly between the two groups. Conclusion: A predefined mini-trampoline training programme resulted in significantly increased postural control in stroke patients compared to balance training in a group. Although not statistically significant, the mini-trampoline training group showed increased improvement in mobility and activities of daily living. These differences could have been statistically significant if we had investigated more patients (i.e. a total sample of 84 patients for the TUG, 98 patients for the 6MWT, and 186 patients for the BI).

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The trampoline aftereffect: the motor and sensory modulations associated with jumping on an elastic surface

Cited by 17 publications

References 36 publications

Effect of surface stiffness on the neural control of stretch‐shortening cycle movements

Effect of surface stiffness on the neural control of stretch‐shortening cycle movements

Effects of weight-bearing exercise on a mini-trampoline on foot mobility, plantar pressure and sensation of diabetic neuropathic feet; a preliminary study

Effects of a predefined mini-trampoline training programme on balance, mobility and activities of daily living after stroke: a randomized controlled pilot study

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