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1.
Knee ; 49: 192-200, 2024 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-39043014

RESUMEN

AIMS: The aim of the present study was to investigate whether the predictability of fronto-parallel trunk rotations (lateral body sway) could serve as a frame of reference to monitor recovery after total knee arthroplasty (TKA). METHODS: Before surgery, 11 TKA patients were asked to perform a treadmill walking task at three different speeds. In addition, their gait abilities were scored on three standard clinical walking tests. The treadmill walking task was repeated at three different timepoints following surgery, i.e., at 3, 6 and 12 months post-TKA. The movements of the trunk were digitized with an inertial sensor to capture the amplitude and the sample entropy (SEn) of the lateral body sway that were evaluated in separate ANOVAs. RESULTS: Before surgery the TKA group showed larger body sway (P = 0.025) with smaller SEn values (P = 0.038), which both restored to levels of healthy adults in the 12 months following surgery. Systematic correlations between the SEn values and the clinical test scores were found. CONCLUSIONS: The current findings show that movement behavior of the trunk in the fronto-parallel plane was affected by knee osteoarthritis and suggest that the predictability of the lateral body sway may serve as an index of recovery after TKA.


Asunto(s)
Artroplastia de Reemplazo de Rodilla , Marcha , Osteoartritis de la Rodilla , Equilibrio Postural , Humanos , Artroplastia de Reemplazo de Rodilla/rehabilitación , Masculino , Femenino , Anciano , Osteoartritis de la Rodilla/cirugía , Osteoartritis de la Rodilla/fisiopatología , Equilibrio Postural/fisiología , Marcha/fisiología , Persona de Mediana Edad , Recuperación de la Función , Prueba de Esfuerzo/métodos , Caminata/fisiología
2.
Sensors (Basel) ; 23(10)2023 May 22.
Artículo en Inglés | MEDLINE | ID: mdl-37430890

RESUMEN

This study aimed to investigate whether sample entropy (SEn) and peak frequency values observed in treadmill walking could provide physical therapists valuable insights into gait rehabilitation following total knee arthroplasty (TKA). It was recognized that identifying movement strategies that during rehabilitation are initially adaptive but later start to hamper full recovery is critical to meet the clinical goals and minimize the risk of contralateral TKA. Eleven TKA patients were asked to perform clinical walking tests and a treadmill walking task at four different points in time (pre-TKA, 3, 6, and 12 months post-TKA). Eleven healthy peers served as the reference group. The movements of the legs were digitized with inertial sensors and SEn and peak frequency of the recorded rotational velocity-time functions were analyzed in the sagittal plane. SEn displayed a systematic increase during recovery in TKA patients (p < 0.001). Furthermore, lower peak frequency (p = 0.01) and sample entropy (p = 0.028) were found during recovery for the TKA leg. Movement strategies that initially are adaptive, and later hamper recovery, tend to diminish after 12 months post-TKA. It is concluded that inertial-sensor-based SEn and peak frequency analyses of treadmill walking enrich the assessment of movement rehabilitation after TKA.


Asunto(s)
Artroplastia de Reemplazo de Rodilla , Humanos , Entropía , Caminata , Marcha , Prueba de Paso
3.
J Mot Behav ; 55(5): 499-512, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-36990461

RESUMEN

Using the non-affected leg as stable frame of reference for the affected leg in gait assessment in knee osteoarthritis (KO) fails due to compensatory mechanisms. Assessing the cyclical movements of the upper extremities in a frequency-controlled repetitive punching task may provide an alternative frame of reference in gait assessment in patients with KO. Eleven participants with unilateral KO and eleven healthy controls were asked to perform treadmill walking and repetitive punching. The KO group showed more predictable (p = 0.020) and less automatized (p = 0.007) movement behavior than controls during treadmill walking. During repetitive punching, the KO group showed a similar degree of predictability (p = 0.784) but relative more automatized movement behavior (p = 0.013). Thus, the predictability of the movement behavior of the upper extremities during repetitive punching seems unaffected by KO and could provide an alternative frame of reference in gait assessment in patients with KO.


Asunto(s)
Osteoartritis de la Rodilla , Humanos , Marcha , Caminata , Movimiento , Prueba de Esfuerzo , Fenómenos Biomecánicos , Articulación de la Rodilla
4.
Motor Control ; 26(1): 15-35, 2022 01 01.
Artículo en Inglés | MEDLINE | ID: mdl-34768239

RESUMEN

The present study explores variations in the degree of automaticity and predictability of cyclical arm and leg movements. Twenty healthy adults were asked to walk on a treadmill at a lower-than-preferred speed, their preferred speed, and at a higher-than-preferred speed. In a separate, repetitive punching task, the three walking frequencies were used to cue the target pace of the cyclical arm movements. Movements of the arms, legs, and trunk were digitized with inertial sensors. Whereas absolute slope values (|ß|) of the linear fit to the power spectrum of the digitized movements (p < .001, η2 = .676) were systematically smaller in treadmill walking than in repetitive punching, sample entropy measures (p < .001, η2 = .570) were larger reflecting the former task being more automated but also less predictable than the latter task. In both tasks, increased speeds enhanced automatized control (p < .001, η2 = .475) but reduced movement predictability (p = .008, η2 = .225). The latter findings are potentially relevant when evaluating effects of task demand changes in clinical contexts.


Asunto(s)
Brazo , Pierna , Adulto , Humanos , Movimiento , Torso , Caminata
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