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Find video protocols related to scientific articles indexed in Pubmed.
Adherence to commonly prescribed, home-based strength training exercises for the lower extremity can be objectively monitored using the Bandcizer.
J Strength Cond Res
PUBLISHED: 09-17-2014
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The purpose of this study was to investigate the validity of automatically stored exercise-data from the elastic band sensor© compared to a gold-standard stretchsensor during exercises commonly used for rehabilitation of the hip and knee. The design was a concurrent validity study. Participants performed three sets of 10 repetitions of six exercises with both sensors attached to the same elastic exercise band. These were knee extension, knee flexion, hip abduction and adduction, hip flexion and hip external rotation. Agreement between methods was calculated for: date, time-of-day, repetitions, total and single repetition, and contraction-phase specific time-under-tension (TUT). Files from the elastic band sensor© contained identical dates, time-of-day and number of repetitions for each exercise set compared to the gold-standard. Total TUT and total single repetition TUT were highly correlated with the stretch-sensor (r=0.83-0.96) but lower for contraction-phase specific TUTs (r=0.45-0.94). There were systematic differences between the methods ranging from 0.0-2.2 seconds (0.0-6.3%) for total TUT and total single repetition TUT, and between 0.0-3.3 seconds (0.0-33.3%) for contraction-phase specific TUTs. The elastic band sensor© is a valid measure of: date, time-of-day, number of repetitions and sets, total TUT, and total single repetition TUT during commonly used home-based strength training exercises. However, the elastic band sensor© seems unable to validly measure TUT for specific contraction-phases.
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Role of preoperative pain, muscle function, and activity level in discharge readiness after fast-track hip and knee arthroplasty.
Acta Orthop
PUBLISHED: 06-23-2014
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The concept of fast-track surgery has led to a decline in length of stay after total hip arthroplasty (THA) and total knee arthroplasty (TKA) to about 2-4 days. However, it has been questioned whether this is only achievable in selected patients-or in all patients. We therefore investigated the role of preoperative pain and functional characteristics in discharge readiness and actual LOS in fast-track THA and TKA.
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Early progressive strength training to enhance recovery after fast-track total knee arthroplasty. A randomized controlled trial.
Arthritis Care Res (Hoboken)
PUBLISHED: 04-02-2014
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Objective. To compare 7 weeks of supervised physical rehabilitation with or without progressive strength training (PST) commenced early after fast-track total knee arthroplasty (TKA) on functional performance. Methods. Eighty-two patients with a unilateral primary TKA were randomized to 2 different interventions: 7 weeks of supervised physical rehabilitation with (PST-group) and without (CON-group) PST commenced early after fast-track TKA. The primary outcome was the maximal distance walked in 6 minutes (6-minute walk test). Secondary outcomes were lower limb strength and power, knee joint effusion and range of motion, knee pain and self-reported disability and quality of life. All outcome measures were assessed before (baseline) and 4, 8 and 26 weeks after TKA. Results. There was no statistically significant difference between the PST- and CON-group in the change score from baseline to the 8-week postoperative assessment (primary endpoint) for the 6-minute walk test with unadjusted baseline scores (mean difference between groups: -11.3 meters, 95% confidence interval -45.4 to 22.7 meters; analysis of variance (ANOVA), p=0.51). There were no statistically significant or clinically meaningful differences between groups in change scores from baseline to any other time point for all secondary outcomes. The secondary outcome, knee-extension strength did not reach the level recorded before surgery in both groups. Conclusions. Seven weeks of supervised physical rehabilitation with PST was not superior to 7 weeks of supervised physical rehabilitation without PST in improving functional performance, measured as the maximal walking distance in 6 minutes, at the primary endpoint 8 weeks after fast-track TKA. © 2014 American College of Rheumatology.
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Acute and sub-acute effects of repetitive kicking on hip adduction torque in injury-free elite youth soccer players.
J Sports Sci
PUBLISHED: 03-26-2014
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Hip adduction strength is important for kicking and acceleration in soccer players. Changes in hip adduction strength may therefore have an effect on soccer players' athletic performance. The purpose of this study was to investigate the acute and sub-acute effects of a kicking drill session on hip strength, concerning isometric hip adduction, abduction and flexion torque of the kicking leg and the supporting leg. Ten injury-free male elite soccer players, mean ± s age of 15.8 ± 0.4 years participated. All players underwent a specific 20 min kicking drill session, comprising 45 kicks. The players were tested the day before, 15 min after and 24 h after the kicking drill session by a blinded tester using a reliable test procedure. The isometric hip-action and leg-order were randomized. For the kicking leg, hip adduction torque increased from 2.45 (2.19-2.65) Nm ? kg(-1), median (25th-75th percentiles), at pre-kicking to 2.65 (2.55-2.81) Nm ? kg(-1) (P = 0.024) 24 h post-kicking. This may have implications for the soccer player's ability to maximally activate the hip adductors during kicking and acceleration, and thereby improve performance the day after a kicking drill session.
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Increased medial foot loading during drop jump in subjects with patellofemoral pain.
Knee Surg Sports Traumatol Arthrosc
PUBLISHED: 03-10-2014
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To compare medial-to-lateral plantar forces during drop jump and single leg squat in individuals with and without patellofemoral pain.
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Feasibility of progressive strength training implemented in the acute ward after hip fracture surgery.
PLoS ONE
PUBLISHED: 01-01-2014
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Patients with a hip fracture lose more than 50% knee-extension strength in the fractured limb within one week of surgery. Hence, immediate progressive strength training following hip fracture surgery may be rational, but the feasibility unknown.
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Knee pain during strength training shortly following fast-track total knee arthroplasty: a cross-sectional study.
PLoS ONE
PUBLISHED: 01-01-2014
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Loading and contraction failure (muscular exhaustion) are strength training variables known to influence neural activation of the exercising muscle in healthy subjects, which may help reduce neural inhibition of the quadriceps muscle following total knee arthroplasty (TKA). It is unknown how these exercise variables influence knee pain after TKA.
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Acute hospitalization of the older patient: changes in muscle strength and functional performance during hospitalization and 30 days after discharge.
Am J Phys Med Rehabil
PUBLISHED: 04-05-2013
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Acute hospitalization of older patients may be associated with loss of muscle strength and functional performance. The aim of this study was to investigate the effect of acute hospitalization as a result of medical disease on muscle strength and functional performance in older medical patients.
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Novel stretch-sensor technology allows quantification of adherence and quality of home-exercises: a validation study.
Br J Sports Med
PUBLISHED: 03-06-2013
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OBJECTIVE: To investigate if a new stretch sensor attached to an elastic exercise band can assist health professionals in evaluating adherence to home exercises. More specifically, the study investigated whether health professionals can differentiate elastic band exercises performed as prescribed, from exercises not performed as prescribed. METHODS: 10 participants performed four different shoulder-abduction exercises in two rounds (80 exercise scenarios in total). The scenarios were (1) low contraction speed, full range of motion (0-90°), (2) high contraction speed, full range of motion (0-90°), (3) low contraction speed, diminished range of motion (0-45°) and (4) unsystematic pull of the elastic exercise band. Stretch-sensor readings from each participant were recorded and presented randomly to the raters. Two raters were asked to differentiate between unsystematic pull (scenario 4), from shoulder abduction strength exercises (scenarios 1-3). The next two raters were asked to identify the four different exercise scenarios (scenarios 1-4). RESULTS: The first two raters were able to differentiate between unsystematic pull (scenario 4) from shoulder abduction strength exercises (scenarios 1-3). They made no errors (100% success rate). The second two raters were both able to identify each of the 80 scenarios (scenarios 1-4). They too made no errors (100% success rate). CONCLUSIONS: The stretch-sensor readings from the elastic exercise band allow health professionals to quantify whether strength-exercises have been performed as prescribed. These findings have great implications for future clinical practice and research where home exercises are the drugs-of-choice, as they enable clinicians and researchers to measure the exact adherence and quality of the prescribed exercises.
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Concentric and eccentric time-under-tension during strengthening exercises: validity and reliability of stretch-sensor recordings from an elastic exercise-band.
PLoS ONE
PUBLISHED: 01-01-2013
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Total, single repetition and contraction-phase specific (concentric and eccentric) time-under-tension (TUT) are important exercise-descriptors, as they are linked to the physiological and clinical response in exercise and rehabilitation.
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Surgery-induced changes and early recovery of hip-muscle strength, leg-press power, and functional performance after fast-track total hip arthroplasty: a prospective cohort study.
PLoS ONE
PUBLISHED: 01-01-2013
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By measuring very early changes in muscle strength and functional performance after fast-track total hip arthroplasty (THA), post-operative rehabilitation, introduced soon after surgery, can be designed to specifically target identified deficits.
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Progressive strength training (10 RM) commenced immediately after fast-track total knee arthroplasty: is it feasible?
Disabil Rehabil
PUBLISHED: 11-15-2011
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To explore the feasibility of progressive strength training commenced immediately after total knee arthroplasty (TKA).
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Measuring medial longitudinal arch deformation during gait. A reliability study.
Gait Posture
PUBLISHED: 03-23-2011
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Clinical evaluation of medial longitudinal arch deformation (MLAD) during walking gait is often estimated from static measures of e.g. navicular drop (ND) measured during quiet standing. The aim of the present study was to test the reliability of a new three-dimensional method of measuring the MLAD during gait and to compare this method with a static measure and a 2D dynamic method. Fifty-two feet (26 healthy male participants) were tested twice 4-9 days apart in a biomechanical gait analysis laboratory using a 3D three-marker foot model, a 2D video-based model for the measurement of MLAD during gait, and ND for measurements of MLAD during quiet standing. The 3D method showed the highest test-retest reliability among the measurements of MLAD. Furthermore, the ND showed only moderate correlation with both measurements of MLAD during gait. The new 3D method was found to be highly reliable and showed that ND obtained during quiet standing could not predict the MLAD during gait. The 3D method, or alternatively the 2D method, may be used in clinical settings as reliable methods for easy estimation of the foot longitudinal stability.
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Thigh and knee circumference, knee-extension strength, and functional performance after fast-track total hip arthroplasty.
PM R
PUBLISHED: 02-22-2011
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To (1) quantify changes in knee-extension strength and functional-performance at discharge after fast-track total hip arthroplasty (THA) and (2) investigate whether these changes correlate to changes in thigh and knee circumference (ie, swelling) or pain.
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Loss of knee-extension strength is related to knee swelling after total knee arthroplasty.
Arch Phys Med Rehabil
PUBLISHED: 04-23-2010
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To examine whether changes in knee-extension strength and functional performance are related to knee swelling after total knee arthroplasty (TKA).
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How many trials are needed to achieve performance stability of the Timed Up & Go test in patients with hip fracture?
Arch Phys Med Rehabil
PUBLISHED: 01-23-2010
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To examine the number of trials needed to achieve performance stability of the Timed Up & Go (TUG) test using a standardized walking aid in patients with hip fracture who are allowed full weight bearing (FWB).
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The activity pattern of shoulder muscles in subjects with and without subacromial impingement.
J Electromyogr Kinesiol
PUBLISHED: 11-13-2009
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Altered shoulder muscle activity is frequently believed to be a pathogenetic factor of subacromial impingement (SI) and therapeutic interventions have been directed towards restoring normal motor patterns. Still, there is a lack of scientific evidence regarding the changes in muscle activity in patients with SI. The aim of the study was to determine and compare the activity pattern of the shoulder muscles in subjects with and without SI. Twenty-one subjects with SI and 20 healthy controls were included. Electromyography (EMG) was assessed from eight shoulder muscles from both shoulders during motion. In the symptomatic shoulder, there was a significantly greater EMG activity during abduction in the supraspinatus and latissimus muscles and less activity in serratus anterior compared to the healthy subjects. During external rotation, there was significantly less activity of the infraspinatus and serratus anterior muscles on the symptomatic side compared to the healthy subjects. On the asymptomatic side, the groups showed different muscle activity during external rotation. Our findings of an altered shoulder muscle activity pattern on both the symptomatic and asymptomatic side in patients indicate that the different motor patterns might be a pathogenetic factor of SI, perhaps due to inappropriate neuromuscular strategies affecting both shoulders.
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Ankle torque steadiness is related to muscle activation variability and coactivation in children with cerebral palsy.
Muscle Nerve
PUBLISHED: 08-08-2009
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The aims of this study were to: (1) investigate the significance of muscle activation variability and coactivation for the ability to perform steady submaximal ankle torque (torque steadiness) in healthy children and those with cerebral palsy (CP), and (2) assess ankle function during isometric contractions in those children. Fourteen children with CP who walked with equinus foot deformity and 14 healthy (control) children performed maximal and steady submaximal ankle dorsi- and plantarflexions. Dorsiflexion torque steadiness was related to agonist and antagonist muscle activation variability as well as the plantarflexor coactivation level in children with CP (r > 0.624, P < 0.03). Moreover, children with CP displayed reduced maximal torque and submaximal torque steadiness of both dorsi- and plantarflexion compared with controls (P < 0.05). Both muscle groups may benefit from strength training, as they exhibit poor submaximal control and weakness in children with CP.
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Dorsiflexor muscle-group thickness in children with cerebral palsy: relation to cross-sectional area.
NeuroRehabilitation
PUBLISHED: 07-15-2009
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If the thickness and cross-sectional area of the dorsiflexor muscle group are related in children with cerebral palsy, measurements of muscle thickness may be used to monitor changes in muscle size due to training or immobilisation in these patients. We assessed the validity and reliability of measurements of dorsiflexor muscle-thickness using the cross-sectional area of the muscle group as the criterion-related muscle-size variable. Muscle thickness was measured using ultrasound, and cross-sectional area using MRI in nine children with spastic cerebral palsy (eight with hemiplegia). Test-retest reliability of the muscle-thickness measurements was assessed in six healthy subjects. All measurements were made on both legs at 35% lower leg length. In the children with cerebral palsy, dorsiflexor muscle-thickness and cross-sectional area were well correlated (r(2) = 0.778, P < 0.001), and the reliability of the muscle-thickness measurements was high in the healthy subjects (ICC(2.1) = 0.94, standard error of measurement = 0.04 cm). The dorsiflexor muscle-thickness was 22% less in the affected compared to the non-affected leg in children with hemiplegic cerebral palsy (P < 0.001). Accordingly, the dorsiflexor cross-sectional area was 32% less in the affected compared to the non-affected leg (P = 0.002). Measurements of dorsiflexor muscle-thickness can be reliably obtained, and they reflect dorsiflexor cross-sectional area in children with cerebral palsy.
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Knee-extension strength, postural control and function are related to fracture type and thigh edema in patients with hip fracture.
Clin Biomech (Bristol, Avon)
PUBLISHED: 04-23-2009
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Post-surgery thigh edema, loss of knee-extension strength, and reduced physical performance are common following a hip fracture. It is not known if knee-extension strength and physical performance are related to the edema and fracture type. The aim of this study was to examine the influence of fracture type and post-surgery edema on physical performances in patients with hip fracture.
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Approximate entropy based on attempted steady isometric contractions with the ankle dorsal- and plantarflexors: reliability and optimal sampling frequency.
J. Neurosci. Methods
PUBLISHED: 04-10-2009
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The aim of this study was to (1) examine the test-retest reliability of approximate entropy (ApEn) calculated for torque time-series from attempted steady isometric contractions performed at two different days, and (2) examine the significance of the sampling frequency for the ApEn values. Eighteen healthy young subjects (13+/-3 years, mean+/-1 S.D.) performed attempted steady isometric submaximal contractions with the ankle dorsal- and plantarflexors at two different days. Relative (ICC(3.1)) and absolute (standard error of measurement [S.E.M.], and S.E.M.%) test-retest reliability was assessed for the ApEn values calculated for torque time-series down-sampled to 30 and 100Hz, respectively. The relative reliability was generally moderate (0.360< or =ICC(3.1)< or =0.897), with an absolute reliability (S.E.M.%) of 6-14%. The mean ApEn values varied considerably depending on the applied down-sampling frequency (5-200Hz). When ApEn was used to quantify structure in the torque time-series, the relative and absolute reliability of steady isometric contractions with the ankle proved to be good in healthy young subjects. We propose that an optimal time-series down-sampling frequency exists for ApEn calculations, which will increase the sensitivity for biological system-changes, reduce adverse effects of random noise, and ensure that biological information in the signal is preserved. We recommend estimating this frequency using a variable high-pass filter-method for frequency analysis. Based on this method, the optimized time-series down-sampling frequency was around 30Hz for the isometric contractions performed with the ankle in the present study.
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Timed up & go test score in patients with hip fracture is related to the type of walking aid.
Arch Phys Med Rehabil
PUBLISHED: 02-17-2009
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Kristensen MT, Bandholm T, Holm B, Ekdahl C, Kehlet H. Timed Up & Go test score in patients with hip fracture is related to the type of walking aid.
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Muscle activity during knee-extension strengthening exercise performed with elastic tubing and isotonic resistance.
Int J Sports Phys Ther
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While elastic resistance training, targeting the upper body is effective for strength training, the effect of elastic resistance training on lower body muscle activity remains questionable. The purpose of this study was to evaluate the EMG-angle relationship of the quadriceps muscle during 10-RM knee-extensions performed with elastic tubing and an isotonic strength training machine.
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Normalized knee-extension strength or leg-press power after fast-track total knee arthroplasty: which measure is most closely associated with performance-based and self-reported function?
Arch Phys Med Rehabil
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To investigate which of the 2 muscle-impairment measures for the operated leg, normalized knee extension strength or leg press power, was most closely associated with performance-based and self-reported measures of function shortly after total knee arthroplasty (TKA).
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Twenty-four-hour mobility during acute hospitalization in older medical patients.
J. Gerontol. A Biol. Sci. Med. Sci.
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Inactivity during hospitalization in older medical patients may lead to functional decline. This study quantified 24-hour mobility, validated the accelerometers used, and assessed the daily level of basic mobility in acutely admitted older medical patients during their hospitalization.
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Biomechanical evaluation of the side-cutting manoeuvre associated with ACL injury in young female handball players.
Knee Surg Sports Traumatol Arthrosc
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The purpose of the study was to investigate the biomechanics of the knee and hip joint during handball-specific side-cutting on the dominant and non-dominant leg. Understanding the sports-specific biomechanics may improve prevention measures and post-injury treatment.
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Hip- and knee-strength assessments using a hand-held dynamometer with external belt-fixation are inter-tester reliable.
Knee Surg Sports Traumatol Arthrosc
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In football, ice-hockey, and track and field, injuries have been predicted, and hip- and knee-strength deficits quantified using hand-held dynamometry (HHD). However, systematic bias exists when testers of different sex and strength perform the measurements. Belt-fixation of the dynamometer may resolve this. The aim of the present study was therefore to examine the inter-tester reliability concerning strength assessments of isometric hip abduction, adduction, flexion, extension and knee-flexion strength, using HHD with external belt-fixation.
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Eccentric strengthening effect of hip-adductor training with elastic bands in soccer players: a randomised controlled trial.
Br J Sports Med
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Soccer players with weak hip-adductor muscles are at increased risk of sustaining groin injuries. Therefore, a simple hip-adductor strengthening programme for prevention of groin injuries is needed.
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Neurorehabilitation with versus without resistance training after botulinum toxin treatment in children with cerebral palsy: a randomized pilot study.
NeuroRehabilitation
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To compare the effects of physical rehabilitation with (PRT) and without (CON) progressive resistance training following treatment of spastic plantarflexors with botulinum toxin type A (BoNT) in children with cerebral palsy (CP).
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Reliability of the 6-min walk test after total knee arthroplasty.
Knee Surg Sports Traumatol Arthrosc
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The 6-min walk test is a simple clinical outcome measure, which has been used frequently to assess functional performance in many different patient groups, including patients with total knee arthroplasty (TKA). The 6-min walk test measures the maximal distance a subject is able to walk in 6 min. The reliability is unknown in patients with TKA. Therefore, the purpose of the study was to assess the reliability of the 6-min walk test in patients with recent TKA.
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Physiotherapy exercise after fast-track total hip and knee arthroplasty: time for reconsideration?
Arch Phys Med Rehabil
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Major surgery, including total hip arthroplasty (THA) and total knee arthroplasty (TKA), is followed by a convalescence period, during which the loss of muscle strength and function is considerable, especially early after surgery. In recent years, a combination of unimodal evidence-based perioperative care components has been demonstrated to enhance recovery, with decreased need for hospitalization, convalescence, and risk of medical complications after major surgery-the fast-track methodology or enhanced recovery programs. It is the nature of this methodology to systematically and scientifically optimize all perioperative care components, with the overall goal of enhancing recovery. This is also the case for the care component "physiotherapy exercise" after THA and TKA. The 2 latest meta-analyses on the effectiveness of physiotherapy exercise after THA and TKA generally conclude that physiotherapy exercise after THA and TKA either does not work or is not very effective. The reason for this may be that the "pill" of physiotherapy exercise typically offered after THA and TKA does not contain the right active ingredients (too little intensity) or is offered at the wrong time (too late after surgery). We propose changing the focus to earlier initiated and more intensive physiotherapy exercise after THA and TKA (fast-track physiotherapy exercise), to reduce the early loss of muscle strength and function after surgery. Ideally, the physiotherapy exercise interventions after THA and TKA should be simple, using few and well-chosen exercises that are described in detail, adhering to basic exercise physiology principles, if possible.
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Effect of knee joint icing on knee extension strength and knee pain early after total knee arthroplasty: a randomized cross-over study.
Clin Rehabil
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To investigate the acute effect of knee joint icing on knee extension strength and knee pain in patients shortly after total knee arthroplasty.
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JoVE Visualize is a tool created to match the last 5 years of PubMed publications to methods in JoVE's video library.

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In developing our video relationships, we compare around 5 million PubMed articles to our library of over 4,500 methods videos. In some cases the language used in the PubMed abstracts makes matching that content to a JoVE video difficult. In other cases, there happens not to be any content in our video library that is relevant to the topic of a given abstract. In these cases, our algorithms are trying their best to display videos with relevant content, which can sometimes result in matched videos with only a slight relation.