scholarly journals Effects of Postoperative Rehabilitation on Gait Parameters and Electromyography Variables in Acute and Chronic Anterior Cruciate Ligament Reconstruction Surgery in Football Players

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Gopal Nambi ◽  
Walid Kamal Abdelbasset ◽  
Anju Verma ◽  
Shereen H. Elsayed ◽  
Osama R. Aldhafian ◽  
...  
Keyword(s):  
Stance Phase ◽  
Gait Cycle ◽  
Vastus Lateralis ◽  
Cruciate Ligament ◽  
Test Group ◽  
Control Group ◽  
Football Players ◽  
Postoperative Rehabilitation ◽  
Double Support ◽  
Gait Parameters

Background and Objective. To date, there were no clinically proven and evident ACLR rehabilitation protocols developed exclusively for football players, also no comparative studies were conducted on kinematic, kinetic, and EMG parameters on postoperative rehabilitation protocol in acute and chronic ACLR. The objective of this study was to find and compare the kinematic, kinetic, and EMG effects of postoperative rehabilitation after acute and chronic ACLR surgeries in football players. Design and Setting. Using the convenience sampling method, eligible subjects were divided into three groups. The test group consisted of acute (n = 15) and chronic (n = 15) ACL injured subjects who underwent ACLR surgery and 8 weeks postoperative rehabilitation. The control group consists of (n = 15) healthy subjects. Kinematic (cadence (steps/min), step length (cm), step width (cm), double support (% of the gait cycle), and swing phase (% of the gait cycle)), kinetic (F1, early stance phase; F2, middle stance phase; and F3, late stance phase forces), and EMG data of the (biceps femoris, adductor longus, vastus medialis, and vastus lateralis) muscles were recorded and analyzed at baseline, 8 weeks, 6 months, and 12 months follow-up. Results. The results of the a-ACLR, c-ACLR, and control groups were compared. At 8 weeks following postoperative rehabilitation, the a-ACLR group shows more significant changes than the c-ACLR group ( p < 0.001 ). At 6 and 12 months, there are normal values of kinematic and kinetic values in a-ACLR compared with the results of the control group ( p < 0.001 ). Conclusion. The study showed that postoperative rehabilitation provides significant effects in the kinematic, kinetic, and EMG gait parameters in acute ACLR than chronic ACLR subjects. Early surgical intervention and postrehabilitation are mandatory to get the significant effects in the clinical parameters in acute and chronic ACL injury.

scholarly journals Women after Bilateral Surgical Correction of Hallux Valgus Do not Show Improvement in Spatiotemporal Gait Parameters at 18 Weeks Postoperatively

2021 ◽  
Vol 10 (4) ◽  
pp. 608
Author(s):  
Katarzyna Kaczmarczyk ◽  
Gabor J. Barton ◽  
Ida Wiszomirska ◽  
Michal Wychowanski
Keyword(s):  
Hallux Valgus ◽  
Surgical Correction ◽  
Control Group ◽  
Stride Time ◽  
Leg Length ◽  
Control Groups ◽  
Postoperative Rehabilitation ◽  
Double Support ◽  
Gait Parameters ◽  
And Control

Background: Hallux valgus (HV) is a gait-altering orthopedic deformity, somewhat more prevalent in women, which often affects both limbs. Although surgery is a commonly applied treatment, there is no consensus in the literature on how invasive HV correction affects spatiotemporal gait parameters, or how quickly improvement can be expected. We investigated gait parameters in female HV patients who underwent bilateral surgical correction of hallux valgus, both preoperatively and 18 weeks following surgery (a timeframe relevant from the perspective of physical therapy), and also in relation to a non-HV control group. Methods: A total of 23 women aged 40–70 years, with moderate to severe HV deformity in both feet, were assessed preoperatively and 18 weeks postoperatively, and an age-matched control group of 76 healthy women was also assessed. A total of 22 spatiotemporal parameters were collected during 30 s walks over an electronic walkway (Zebris Medical System). Results: Of the 22 parameters analyzed, significant differences between the preoperative experimental and control groups were found only in 4 parameters (Velocity, Right step time, Total double support and Stride time), but in 16 parameters between the postoperative experimental and control groups (the greatest impact being found for: Left and Right Step time, Stride time, Cadence, Right Foot rotation, Left Step length (% leg length) and Stride length (% leg length)). Conclusions: Women after bilateral HV correction did not exhibit improved (i.e., more normal) gait parameters at 18 weeks postoperatively; rather, they showed more gait abnormalities than preoperatively. These findings urge longer-term planning of postoperative rehabilitation, involving continual evaluation of gait improvement.

scholarly journals Dysfunctional muscle activities and co-contraction in the lower-limb of lumbar disc herniation patients during walking

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Wei Wang ◽  
Hui Wei ◽  
Runxiu Shi ◽  
Leitong Lin ◽  
Lechi Zhang ◽  
...  
Keyword(s):  
Lumbar Disc Herniation ◽  
Disc Herniation ◽  
Lower Limb ◽  
Gait Cycle ◽  
Lumbar Disc ◽  
Lower Limbs ◽  
Heel Strike ◽  
Control Group ◽  
Double Support ◽  
Support Phase

AbstractThis study aimed to investigate lower-limb muscle activities in gait phases and co-contraction of one gait cycle in patients with lumbar disc herniation (LDH). This study enrolled 17 LDH patients and 17 sex- and age-matched healthy individuals. Bilateral muscle activities of the rectus femoris (RF), biceps femoris long head (BL), tibialis anterior (TA), and lateral gastrocnemius (LG) during walking were recorded. The gait cycle was divided into four phases by the heel strike and top off according to the kinematics tracks. Root mean square (RMS), mean frequency (MF), and co-contraction of surface electromyography signals were calculated. The LDH patients showed enhanced BL RMS during the single support phase (SS), second double support phase, and swing phase (SW) as well as decreased MF of RF during SS and of TA and LG during SW (p < 0.05). The co-contraction of the TA-LG was increased in LDH patients than in the control group (p < 0.05). Positive correlations were observed between TA-LG co-contraction (affected side, r = 0.557, p = 0.020; contralateral side, r = 0.627, p = 0.007) and the Oswestry disability index scores in LDH patients. LDH patients have increased BL firing rate and insufficient motor unit recruitment in specific phases in the lower limbs during walking. Dysfunction in LDH patients was associated with immoderate intermuscular co-contraction of the TA-LG during walking.

scholarly journals Gait Asymmetry Comparison between Subjects with and without Nonspecific Chronic Low Back Pain

Symmetry ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 2129
Author(s):  
Dongchul Lee ◽  
Paul Sung
Keyword(s):  
Low Back Pain ◽  
Back Pain ◽  
Chronic Low Back Pain ◽  
Gait Cycle ◽  
Similarity Index ◽  
Control Group ◽  
Low Back ◽  
Gait Patterns ◽  
Gait Parameters ◽  
Gait Asymmetry

Individuals with chronic low back pain (LBP) report impaired somatosensory function and balance. However, there is a lack of investigation on limb motion similarities between subjects with and without LBP during gait. The aim of this study was to compare gait parameters as well as combined limb motions using the kinematic similarity index (KSI) between subjects with and without LBP. Twenty-two subjects with LBP and 19 age- and body mass index-matched control subjects participated in this study. The combined limb motions in the gait cycle of subjects with LBP were compared with those of a prototype derived from healthy subjects. The calculations resulted in response vectors that were analyzed in comparison to control-derived prototype response vectors for the normalized index at 5% increments in the gait cycle. The results of our study indicated that the KSI of the control group demonstrated higher similarities in the swing (t = 4.23, p = 0.001) and stance (t = 6.26, p = 0.001) phases compared to the LBP group. The index for the whole gait cycle was significantly different between the groups (t = 6.52, p = 0.001), especially in the midstance and swing phases. The LBP group could have adjusted the gait patterns during these specific phases. The KSI is useful for clinical outcome measures to differentiate kinematic changes and to demonstrate quantified similarities in the gait cycle between subjects with and without LBP. It is warranted to validate the KSI for the analysis of physiological gait asymmetry using a larger sample in future studies.

scholarly journals Foot Gait Analysis In Old Female Patients with Acquired Adult Flatfoot

2018 ◽  
Vol 3 (3) ◽  
pp. 2473011418S0044
Author(s):  
Hyucksoo Shin ◽  
Dong Yeon Lee ◽  
Jae Hee Lee ◽  
Hyo Jeong Yoo
Keyword(s):  
Gait Analysis ◽  
Stance Phase ◽  
Gait Cycle ◽  
Transverse Plane ◽  
Control Group ◽  
Segmental Motion ◽  
Age And Gender ◽  
Time Points ◽  
Female Patients ◽  
And Gender

Category: Midfoot/Forefoot Introduction/Purpose: Acquired adult flatfoot is thought to be caused by a loss of the dynamic and static supportive structure of the medial longitudinal arch. Current evaluation systems mostly rely on static measurements such as standing x-ray, CT and MRI. Recently, the gait analysis has been suggested to be a good tool for assessment of functional impairment. Although there are some previous investigations about gait of flatfoot, there was a limitation in control groups in terms of matching age and gender. The objective of this study was to find the effect of the acquired adult flatfoot on the segmental motion of the foot during gait by comparisons with age and gender controlled healthy adults. Methods: 20 symptomatic flatfeet (12 female patients, 51–80 years old) and 50 symptom-free normal feet (50 female participants, 60-69 years old) were included in this study. For radiographic examinations, meary angle, calcaneal pitch, talo-calcaneal angle, tibio-calcaneal angle was measured using standing lateral radiograph of the foot. And talonavicular coverage angle was measured using standing anteroposterior radiograph of the foot. For foot gait analysis, the temporal gait parameters such as cadence, speed, stride length, step width, step time were calculated. Segmental foot kinematics evaluated using a 3D MFM of a 15-marker set (Foot3D model). Inter-segmental angles (ISA) (hindfoot relative to tibia, forefoot to hindfoot, and hallux to forefoot) were calculated at each time points (100 time points for whole gait cycle). The ISAs (position) at specific phases of gait cycle, the change of ISA (motion) between phases and range of ISAs during the whole gait cycle were calculated and compared between groups. Results: Range of motion (ROM) of sagittal and transverse plane of hindfoot, and transverse plane of forefoot was lower in flatfoot group. ROM of coronal plane of hallux and sagittal plane of forefoot was higher in flatfoot group. There also are significantly different findings in flatfoot group such as more dorsiflexed position of forefoot segment, reduced forefoot abduction motion during terminal stance and loss of push off during preswing phase. In addition, the time of push off phase in flatfoot group occurred later than the control group. In other words, lag of stance phase occurred in flatfoot group (Figure 1). This tendency became even worse when the moderate group and the severe group were compared based on the -20 ° of meary angle. Conclusion: As shown in the gait analysis, the overall reduction in hindfoot ROM and the increase in forefoot ROM in the flatfoot group suggest a midfoot breakage, which shows a decrease in push off power and a lag in the stance phase. So, the results of this study suggest that altered segmental motion of the foot in acquired adult flatfoot patients with PTTD, which shows progressive deterioration according to severity. And we think that gait analysis can be used as an objective functional measurement system for evaluation of acquired adult flatfoot patients.

scholarly journals Hemodialysis Impact on Motor Function Beyond Aging and Diabetes – Objectively Assessing Gait and Balance by Wearable Technology

2018 ◽  
Author(s):  
He Zhou ◽  
Fadwa Al-Ali ◽  
Hadi Rahemi ◽  
Nishat Kulkarni ◽  
Abdullah Hamad ◽  
...  
Keyword(s):  
Older Adults ◽  
Motor Function ◽  
Effect Size ◽  
Motor Performance ◽  
Stride Length ◽  
Gait Cycle ◽  
Center Of Mass ◽  
Static Balance ◽  
Double Support ◽  
Gait Parameters

Motor functions are deteriorated by aging. Some conditions may magnify this deterioration. To examine whether hemodialysis (HD) process would negatively impact gait and balance beyond diabetes condition among mid-age adults (48-64 years) and older adults (65+ years). One hundred and ninety-six subjects (age=66.2&plusmn;9.1 years, body-mass-index=30.1&plusmn;6.4 kg/m2, female=56%) in 5 groups were recruited: mid-age adults with diabetes undergoing HD (Mid-age HD+, n=38) and without HD (Mid-age HD-, n=40); older adults with diabetes undergoing HD (Older HD+, n=36) and without HD (Older HD-, n=37); and non-diabetic older adults (Older DM-, n=45). Gait parameters (stride velocity, stride length, gait cycle time, and double support) and balance parameters (ankle, hip, and center of mass sways) were quantified using validated wearable platforms. Groups with diabetes had overall poorer gait and balance compared to the non-diabetic group (p&lt;0.050). Among people with diabetes, the HD+ had significantly worsened gait and balance when comparing to the HD- (Cohen&rsquo;s effect size d=0.63-2.32, p&lt;0.050). Between-group difference was more pronounced among older adults with the largest effect size observed for stride length (d=2.32, p&lt;0.001). Results suggested that deterioration in gait speed among the HD+ was correlated with age (r=-0.440, p&lt;0.001), while this correlation was diminished among the HD-. Interestingly, results also suggested that poor gait in the Older HD- related to poor balance, while no correlation was observed between poor balance and poor gait among the Older HD+. Using objective assessments, results confirmed that the presence of diabetes can deteriorate gait and balance, and this deterioration can be magnified by HD process. Among non-HD people with diabetes, poor static balance described poor gait. However, among people with diabetes undergoing HD, age was a dominate factor describing poor gait irrespective of static balance. Results also suggested feasibility of using wearable platforms to quantify motor performance during routine dialysis clinic visits. These objective assessments may assist in identifying early deterioration in motor function, which in turn may promote timely intervention.

scholarly journals Combination taping technique versus ankle foot orthosis on improving gait parameters in spastic cerebral palsy: A controlled randomized study

2021 ◽  
Author(s):  
Mohamed A. Abdel Ghafar ◽  
Osama R Abdelraouf ◽  
Amr A. Abdel-aziem ◽  
Gihan Samir Mousa ◽  
Ali O. Selim ◽  
...  
Keyword(s):  
Cerebral Palsy ◽  
Randomized Study ◽  
Spastic Cerebral Palsy ◽  
Control Group ◽  
Spastic Diplegia ◽  
Post Intervention ◽  
Double Support ◽  
Ankle Foot Orthosis ◽  
Gait Parameters ◽  
Foot Orthosis

Background: One of the important goals in the treatment of spastic cerebral palsy is to maintain efficient and effective walking in order to be independent in activities and participate in society. Objective: To compare the efficacy of foot combination taping of kinesio tape and athletic tape vs ankle foot orthosis in correcting spatiotemporal gait parameters in children with spastic diplegia. Methods: Thirty-six children with spastic diplegia were randomly assigned into 3 groups; control, combination taping, and ankle foot orthosis groups. Children in the control group, in addition to those in both experimental groups, continued with conventional physical therapy, 1 h, 3 times per week for 4 weeks. Spatiotemporal gait parameters were assessed with the GAITRite system before and after the application of interventions. Results: Significant increases in walking velocity, step length, stride length, right single support duration, and left single support duration of the ankle foot orthosis and combination taping groups than pre-intervention values. [AQ9] Moreover, the post--intervention values of the double support duration of the ankle foot orthosis and combination taping groups were significantly lower than pre-intervention values. There were no significant differences between the post-intervention values of the ankle foot orthosis and combination taping groups for all parameters. Conclusion: The results demonstrated that combination taping is an effective alternative technique to ankle foot orthosis to improve spatiotemporal parameters in children with spastic diplegic in combination with conventional physiotherapy.

scholarly journals Immediate effects of a novel walking assist device with auxiliary illuminator on patients after acute strokes

2019 ◽  
Vol 39 (02) ◽  
pp. 115-124
Author(s):  
Wan-Yun Huang ◽  
Sheng-Hui Tuan ◽  
Min-Hui Li ◽  
Xin-Yu Liu ◽  
Pei-Te Hsu
Keyword(s):  
Gait Speed ◽  
Stride Length ◽  
Stance Phase ◽  
Gait Cycle ◽  
Swing Phase ◽  
Heel Strike ◽  
Assist Device ◽  
Double Support ◽  
Strike Angle ◽  
Support Phase

Background: Many patients after acute stage of stroke are present with abnormal gait pattern due to weakness or hypertonicity of the affected limbs. Facilitation of normal gait is a primary goal of rehabilitation on these patients.Objective: We aimed to investigate whether walking assist device with auxiliary illuminator (quad-cane with laser) providing visual feedback during ambulation could improve parameters of gait cycle immediately among patients with subacute and chronic stroke.Methods: This was a cross-sectional study and 30 participants (male 23, female 7, group 1) with mean age [Formula: see text] years were recruited. Among them, 22 used ankle-foot orthosis [(AFO), group 2] and 8 did not use AFO (group 3) at usual walking. All the participants walked along a strait corridor with even surface for 20[Formula: see text]m without and with using a quad-cane with laser, respectively. A gait analyzer (Reha-Watch1 system) was used to measure the changes of the parameters of gait cycle, including stride length, cadence, gait speed, stance phase, swing phase, duration of single support and double support, the angle between toes and the ground at the time of toe-off (the toe-off angle) and the angle between calcaneus and the ground at the time of heel-strike (the heel-strike angle), before and with the use of a quad-cane with laser.Results: The increase in the heel-strike angle reached a significant difference in groups 1 2, and 3 ([Formula: see text], and [Formula: see text], respectively). However, the stride length, the gait speed, the cadence, percentage of the stance phase, swing phase, single-support phase, and double-support phase in a gait cycle, and the toe-off angle showed no significant change with the use of quad-cane with laser.Conclusion: Patients after acute stroke had an immediate and significant increase in the heel-stroke angle by using a quad-cane with laser during ambulation, which might help the patients to reduce knee hyperextension moment and lessen the pressure of heel at loading phase.

scholarly journals Dynamic Between-Leg Differences While Walking in Anterior Cruciate Ligament–Deficient Patients With and Without Medial Meniscal Posterior Horn Tears

2020 ◽  
Vol 8 (5) ◽  
pp. 232596712091905
Author(s):  
Shuang Ren ◽  
Huijuan Shi ◽  
Yuanyuan Yu ◽  
Zixuan Liang ◽  
Yanfang Jiang ◽  
...  
Keyword(s):  
Stance Phase ◽  
Sagittal Plane ◽  
Cruciate Ligament ◽  
Knee Kinematics ◽  
Control Group ◽  
Control Groups ◽  
Response Phase ◽  
Anterior Cruciate ◽  
And Control ◽  
Anterior Cruciate Ligament Deficient

Background: Patients with anterior cruciate ligament–deficient (ACLD) knees with medial meniscal posterior horn tears (MMPHTs) have been reported to demonstrate a combined stiffening and pivot-shift gait pattern compared with healthy controls. Movement asymmetries are implicated in the development and progression of osteoarthritis. Purpose: To investigate the knee kinematics and kinetic asymmetries in ACLD patients with (ACLD + MMPHT group) and without (ACLD group) MMPHTs while walking on level ground. Study Design: Cross-sectional study; Level of evidence, 3. Methods: A total of 15 patients with isolated unilateral ACL ruptures, 10 with unilateral ACL ruptures and MMPHTs, and 22 healthy controls underwent gait testing between January 2014 and December 2016. Between-leg differences (BLDs) in knee kinematics and kinetics were compared among participants in all groups. Results: The ACLD + MMPHT group demonstrated significantly greater BLDs in knee moments in the sagittal plane during the loading response phase than the ACLD and control groups. Compared with the control group, the ACLD and ACLD + MMPHT groups demonstrated significantly greater BLDs in knee angles in the sagittal plane during the midstance and terminal stance phases. Compared with the control group, significantly greater BLDs in knee rotation moments were found throughout the stance phase in both the ACLD and the ACLD + MMPHT groups. BLDs in lateral ground-reaction forces (GRFs) in the ACLD + MMPHT and ACLD groups were both significantly greater than the control group during the loading response phase. BLDs in anterior GRFs in the ACLD + MMPHT and ACLD groups were both significantly greater than the control group during the loading response phase. Only the ACLD + MMPHT group demonstrated greater BLDs in vertical GRFs than the control group during the loading response phase, while no significant differences were observed between the ACLD and control groups. Conclusion: The ACLD + MMPHT group demonstrated significantly more knee flexion moment asymmetries than the ACLD and control groups during the loading response phase. Both the ACLD + MMPHT and the ACLD groups demonstrated significant knee angle and moment asymmetries in the sagittal plane during the terminal stance phase than the control group. Both the ACLD + MMPHT and the ACLD groups demonstrated knee rotation moment asymmetries during the midstance and terminal stance phases compared with the control group. A rehabilitation program for ACLD patients both with and without MMPHTs should take into consideration these asymmetric gait patterns.

scholarly journals Hemodialysis Impact on Motor Function beyond Aging and Diabetes—Objectively Assessing Gait and Balance by Wearable Technology

Sensors ◽  
2018 ◽  
Vol 18 (11) ◽  
pp. 3939 ◽  
Author(s):  
He Zhou ◽  
Fadwa Al-Ali ◽  
Hadi Rahemi ◽  
Nishat Kulkarni ◽  
Abdullah Hamad ◽  
...  
Keyword(s):  
Older Adults ◽  
Motor Function ◽  
Effect Size ◽  
Stride Length ◽  
Gait Cycle ◽  
Center Of Mass ◽  
Clinic Visit ◽  
Double Support ◽  
Ankle Stability ◽  
Gait Parameters

Motor functions are deteriorated by aging. Some conditions may magnify this deterioration. This study examined whether hemodialysis (HD) process would negatively impact gait and balance beyond diabetes condition among mid-age adults (48–64 years) and older adults (65+ years). One hundred and ninety-six subjects (age = 66.2 ± 9.1 years, body-mass-index = 30.1 ± 6.4 kg/m2, female = 56%) in 5 groups were recruited: mid-age adults with diabetes undergoing HD (Mid-age HD+, n = 38) and without HD (Mid-age HD−, n = 40); older adults with diabetes undergoing HD (Older HD+, n = 36) and without HD (Older HD−, n = 37); and non-diabetic older adults (Older DM−, n = 45). Gait parameters (stride velocity, stride length, gait cycle time, and double support) and balance parameters (ankle, hip, and center of mass sways) were quantified using validated wearable platforms. Groups with diabetes had overall poorer gait and balance compared to the non-diabetic group (p < 0.050). Among people with diabetes, HD+ had significantly worsened gait and balance when comparing to HD− (Cohen’s effect size d = 0.63–2.32, p < 0.050). Between-group difference was more pronounced among older adults with the largest effect size observed for stride length (d = 2.32, p < 0.001). Results suggested that deterioration in normalized gait speed among HD+ was negatively correlated with age (r = −0.404, p < 0.001), while this correlation was diminished among HD−. Interestingly, results also suggested that poor gait among Older HD− is related to poor ankle stability, while no correlation was observed between poor ankle stability and poor gait among Older HD+. Using objective assessments, results confirmed that the presence of diabetes can deteriorate gait and balance, and this deterioration can be magnified by HD process. Among HD− people with diabetes, poor ankle stability described poor gait. However, among people with diabetes undergoing HD, age was a dominate factor describing poor gait irrespective of static balance. Results also suggested feasibility of using wearable platforms to quantify motor performance during routine dialysis clinic visit. These objective assessments may assist in identifying early deterioration in motor function, which in turn may promote timely intervention.

scholarly journals Wearable Sensors Technology as a Tool for Discriminating Frailty Levels During Instrumented Gait Analysis

2020 ◽  
Author(s):  
Andrius Apsega ◽  
Liudvikas Petrauskas ◽  
Vidmantas Alekna ◽  
Kristina Daunoraviciene ◽  
Viktorija Sevcenko ◽  
...  
Keyword(s):  
Gait Analysis ◽  
Gait Speed ◽  
Stance Phase ◽  
Wearable Sensors ◽  
Logistic Models ◽  
Stride Time ◽  
Double Support ◽  
Phase Time ◽  
Gait Assessment ◽  
Gait Parameters

Abstract Background: One of the greatest challenges facing the healthcare of the aging population is frailty. There is growing scientific evidence that gait assessment using wearable sensors could be used for prefrailty and frailty screening. The purpose of this study was to examine the ability of a wearable sensor-based assessment of gait to discriminate between frailty levels (robust, prefrail, and frail).Methods: 133 participants (≥ 60 years) were recruited and frailty was assessed using the Fried criteria. Gait was assessed using wireless inertial sensors attached by straps on the thighs, shins, and feet. Between-group differences in frailty were assessed using analysis of variance. Associations between frailty and gait parameters was assessed using multinomial logistic models with frailty as the dependent variable. We used receiver operating characteristic (ROC) curves to calculate the area under the curve (AUC) to estimate the predictive validity of each parameter. The cut-off values were calculated based on the Youden index.Results: Frailty was identified in 37 (28%) participants, prefrailty in 66 (50%), and no Fried criteria were found in 30 (23%) participants. Gait speed, stance phase time, swing phase time, stride time, double support time, and cadence were able to discriminate frailty from robust, and prefrail from robust. Stride time (AUC = 0.915), stance phase (AUC = 0.923), and cadence (AUC = 0.930) were the most sensitive parameters to separate frail or prefrail from robust. Other gait parameters, such as double support, had poor sensitivity. We determined the value of stride time (1.19s), stance phase time (0.68s), and cadence (101 steps/min) to identify individuals with prefrailty or frailty with sufficient sensitivity and specificity.Conclusions: The results of our study show that gait analysis using wearable sensors could discriminate between frailty levels. We were able to identify several gait indicators apart from gait speed that distinguish frail or prefrail from robust with sufficient sensitivity and specificity. If improved and adapted for everyday use, gait assessment technologies could contribute to frailty screening and monitoring.

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