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Kim S, Callahan EG, Malone ZC, Gilgallon TJ, Glaviano NR. Changes in Hip and Knee Strength Are Not Associated With Improved Clinical Outcomes After Rehabilitation in Individuals With Patellofemoral Pain: A Critically Appraised Topic. J Sport Rehabil 2024; 33:140-148. [PMID: 37931619 DOI: 10.1123/jsr.2023-0160] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Revised: 09/05/2023] [Accepted: 09/27/2023] [Indexed: 11/08/2023]
Abstract
CLINICAL SCENARIO Patellofemoral pain (PFP) is a widespread knee disorder encountered in clinical practice. Clinicians have often focused on strengthening hip and knee musculature to improve pain and disability, which are the ultimate clinical goals of PFP treatment. However, PFP literature has shown improvement in pain and disability without concurrent changes in lower-extremity strength after rehabilitation. Although some researchers have achieved a significant increase in strength after rehabilitation in PFP cohorts, there was no association with improved pain and disability. The inconsistent improvements in strength and the lack of association with clinical outcomes call for a critical appraisal of the available evidence to better understand the association between changes in hip and knee strength and improved clinical outcomes in individuals with PFP. CLINICAL QUESTION Are changes in hip and knee strength associated with improved pain and disability after rehabilitation in individuals with PFP? SUMMARY OF KEY FINDINGS Four studies met the inclusion criteria and were included in the appraisal. Following rehabilitation, one study achieved strength improvements in knee extension. One study achieved strength improvements in knee extension, but not in hip external rotation and hip abduction. Two studies did not achieve strength improvements in hip external rotation, hip abduction, hip extension, or knee extension. All included studies achieved improvements in pain or disability after rehabilitation. None of the studies found a significant association between changes in hip and knee strength (either improved or not) and improved pain and disability. CLINICAL BOTTOM LINE There is consistent evidence that changes in hip and knee strength are not associated with improved clinical outcomes after rehabilitation in adults with PFP. STRENGTH OF RECOMMENDATION Collectively, the body of evidence included is to answer the clinical question aligns with the strength of recommendation of B based on the Strength of Recommendation Taxonomy.
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Affiliation(s)
- Sungwan Kim
- Department of Kinesiology, University of Connecticut, Storrs, CT, USA
- Institute for Sports Medicine, University of Connecticut, Storrs, CT, USA
| | - Evyn G Callahan
- Department of Kinesiology, University of Connecticut, Storrs, CT, USA
| | - Zachary C Malone
- Department of Kinesiology, University of Connecticut, Storrs, CT, USA
- Institute for Sports Medicine, University of Connecticut, Storrs, CT, USA
| | - Timothy J Gilgallon
- Department of Kinesiology, University of Connecticut, Storrs, CT, USA
- Institute for Sports Medicine, University of Connecticut, Storrs, CT, USA
| | - Neal R Glaviano
- Department of Kinesiology, University of Connecticut, Storrs, CT, USA
- Institute for Sports Medicine, University of Connecticut, Storrs, CT, USA
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Kim S, Glaviano NR, Park J. Exercise-induced fatigue affects knee proprioceptive acuity and quadriceps neuromuscular function more in patients with ACL reconstruction or meniscus surgery than in healthy individuals. Knee Surg Sports Traumatol Arthrosc 2023; 31:5428-5437. [PMID: 37787863 DOI: 10.1007/s00167-023-07596-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Accepted: 09/18/2023] [Indexed: 10/04/2023]
Abstract
PURPOSE To observe how knee proprioceptive acuity and quadriceps neuromuscular function change during and after repeated isokinetic knee-extension exercise in patients with anterior cruciate ligament reconstruction (ACLR) or meniscus surgery. METHODS Patients with ACLR or meniscus surgery and matched controls (n = 19 in each group) performed knee-flexion replication at 15° and 75°, and quadriceps peak torque (PT), central activation ratio (CAR) and rate of torque development (RTD) at baseline and immediately after every five sets of isokinetic knee-extension exercise (times 1-5). RESULTS Compared to the baseline, the ACLR and control groups displayed errors in knee-flexion replication at 75° only at time 5 (115.9-155.6%; p ≤ 0.04, d ≥ 0.97), whereas the meniscus surgery group exhibited errors at all time points (142.5-265.6%; p ≤ 0.0003, d ≥ 1.4). Significant percentage reductions in quadriceps CAR were observed between times 4 and 5 in the ACLR group (-5.8%; p = 0.0002, d = 0.96), but not in the meniscus surgery (-1.4%; n.s.) and control (0.1%; n.s.) groups. Significant percentage reductions in quadriceps RTD were observed between times 4 and 5 in the ACLR (-24.2%; p = 0.007, d = 0.99) and meniscus surgery (-23.0%; p = 0.01, d = 0.85) groups, but not in the control group (-0.2%; n.s.). CONCLUSION Patients with ACLR or meniscus surgery displayed a greater loss in knee proprioceptive acuity and quadriceps neuromuscular function during and after exercise than healthy individuals. Evidence-based interventions to enhance exercise-induced fatigue resistance should be implemented following ACLR or meniscus surgery, aiming to prevent proprioceptive and neuromuscular changes within the knee joint and quadriceps. LEVEL OF EVIDENCE III.
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Affiliation(s)
- Sungwan Kim
- Department of Sports Medicine, Kyung Hee University, Yongin, Republic of Korea
| | - Neal R Glaviano
- Department of Kinesiology, University of Connecticut, Storrs, CT, USA
| | - Jihong Park
- Department of Sports Medicine, Kyung Hee University, Yongin, Republic of Korea.
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Kim S, Park J, Boling MC, Glaviano NR. Lower Extremity Muscle Volume in Unilateral and Bilateral Patellofemoral Pain: A Cross-Sectional Exploratory Study Including Superficial and Deep Muscles Authors. J Athl Train 2023:497268. [PMID: 38015817 DOI: 10.4085/1062-6050-0330.23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2023]
Abstract
CONTEXT Existing patellofemoral pain (PFP) literature has primarily focused on quadriceps muscle volume, with limited attention given to the lower limbs deep and superficial muscle volumes in individuals with unilateral and bilateral PFP. This research aims to fill this gap. OBJECTIVE To explore superficial and deep lower extremity muscle volume in women with unilateral and bilateral PFP compared to a normative database of pain-free women. DESIGN Cross-sectional study. SETTING University imaging research center. PATIENTS OR OTHER PARTICIPANTS Twenty women with PFP (10 unilateral and 10 bilateral) and 8 pain-free women. MAIN OUTCOME MEASURE(S) We quantified lower extremity muscle volume via 3.0 Tesla magnetic resonance imaging. Two separate one-way analyses of variance were performed: (1) unilateral PFP (painful vs. non-painful limb) vs. pain-free control and (2) bilateral PFP (more painful vs. less painful limb) vs. pain-free control. RESULTS There were no differences in age and body mass index across groups (P >.05). Compared to pain-free women, both women with unilateral and bilateral PFP had bilaterally smaller volumes of the anterior (iliacus: P ≤ .0004, d = 2.12-2.65), medial (adductor brevis, adductor longus, gracilis, and pectineus: P ≤ .02, d = 1.25-2.24), posterior (obturator externus, obturator internus, and quadratus femoris: P < .05, d = 1.17-4.82), and lateral (gluteus minimus: P ≤ .03, d = 1.16-2.09) hip muscles, and knee extensors (rectus femoris: P ≤.003, d = 1.67-2.16) and flexors (biceps femoris: long and short head: P ≤ .01, d = 1.56-1.93). CONCLUSIONS Both women with unilateral and bilateral PFP 25 displayed decreased volume of multiple superficial and deep muscles of the bilateral hips and knees compared with pain-free women. Interventions should bilaterally target lower limb muscles when treating PFP, and hypertrophy exercises for specific muscles should be explored to enhance interventional choices.
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Affiliation(s)
- Sungwan Kim
- Department of Kinesiology, University of Connecticut, Storrs, CT, United States
- Institute for Sports Medicine, University of Connecticut, Storrs, CT, United States
| | - Jihong Park
- Department of Sports Medicine, Kyung Hee University, Yongin, Republic of Korea
| | - Michelle C Boling
- Department of Clinical and Applied Movement Sciences, University of North Florida, Jacksonville, FL, United States
| | - Neal R Glaviano
- Department of Kinesiology, University of Connecticut, Storrs, CT, United States
- Institute for Sports Medicine, University of Connecticut, Storrs, CT, United States
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Kim S, Glaviano NR, Park J. Sex Differences in Knee Extensor Neuromuscular Function in Individuals With and Without Patellofemoral Pain. Sports Health 2023:19417381231209318. [PMID: 37978417 DOI: 10.1177/19417381231209318] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2023] Open
Abstract
BACKGROUND Impaired knee extensor neuromuscular function has been frequently observed in individuals with patellofemoral pain (PFP); however, few researchers have aimed to understand the influence of sex on knee extensor neuromuscular function in this pathological population. The authors aimed to determine whether there are differences in knee extensor neuromuscular function between sexes in individuals with and without PFP. HYPOTHESIS Women with PFP would exhibit greater deficits in knee extensor neuromuscular function than men with PFP, compared with sex-matched individuals without PFP. STUDY DESIGN Cross-sectional, case-control study. LEVEL OF EVIDENCE Level 4. METHODS A total of 110 individuals were classified into 4 groups: women with PFP (n = 25); men with PFP (n = 30); women without PFP (n = 25); and men without PFP (n = 30). Knee extensor strength (isometric peak torque [PT]), activation (central activation ratio), early, late, and total phase rate of torque development (RTD0-100, RTD100-200, and RTD20-80%), and endurance (isokinetic average PT) were assessed using an isokinetic dynamometer. Group differences were assessed using a 2-way multivariate analysis of variance (sex by PFP). RESULTS Both women and men with PFP exhibited lower knee extensor strength, activation, early, late, and total phase RTD, and endurance versus sex-matched individuals without PFP (P < 0.05 for all comparisons). Women with PFP exhibited lower early phase (7.91 ± 2.02 versus 9.78 ± 2.43 N·m/s/kg; P < 0.01; Cohen d = 0.83), late phase (5.34 ± 1.02 versus 7.28±2.28 N·m/s/kg; P < 0.01; Cohen d = 1.37), and total phase (7.40 ± 2.57 versus 8.72 ± 2.57 N·m/s/kg; P = 0.03; Cohen d = 0.51) RTD than men with PFP. CONCLUSION Compared with sex-matched pain-free individuals, women with PFP displayed lower RTD than men with PFP. Clinicians should note that among individuals with PFP, women are more likely to experience a greater impairment in their knee extensor torque-generating capacity than men. CLINICAL RELEVANCE Additional treatment strategies that effectively improve the ability to rapidly generate torque should be developed and implemented, especially when treating women with PFP.
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Affiliation(s)
- Sungwan Kim
- Department of Sports Medicine, Kyung Hee University, Yongin, Republic of Korea
| | - Neal R Glaviano
- Department of Kinesiology, University of Connecticut, Storrs, Connecticut, USA
| | - Jihong Park
- Department of Sports Medicine, Kyung Hee University, Yongin, Republic of Korea
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Waiteman MC, Garcia MC, Briani RV, Norte G, Glaviano NR, De Azevedo FM, Bazett-Jones DM. Can Clinicians Trust Objective Measures of Hip Muscle Strength From Portable Dynamometers? A Systematic Review With Meta-analysis and Evidence Gap Map of 107 Studies of Reliability and Criterion Validity Using the COSMIN Methodology. J Orthop Sports Phys Ther 2023; 53:655-672. [PMID: 37787581 DOI: 10.2519/jospt.2023.12045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/04/2023]
Abstract
OBJECTIVE: To summarize the evidence on reliability and criterion validity of hip muscle strength testing using portable dynamometers. DESIGN: Systematic review with meta-analysis. LITERATURE SEARCH: Five databases were searched from inception to March 2023. STUDY SELECTION CRITERIA: We included studies investigating reliability or criterion validity of hip flexor, extensor, abductor, adductor, or internal/external rotator strength testing with portable dynamometers in injury-free individuals or those with pelvic/lower limb musculoskeletal disorders. DATA SYNTHESIS: We performed meta-analyses for each muscle group, position, and method of fixation. We rated pooled results as sufficient (>75% of studies with correlations ≥0.70), insufficient (>75% of studies with correlations <0.70), or inconsistent (sufficient/insufficient results). We assessed the quality of evidence, created evidence gap maps, and made clinical recommendations. RESULTS: We included a total of 107 studies (reliability 103, validity 14). The intrarater and interrater reliability for hip muscle strength testing across different positions and methods of fixation was sufficient (intraclass correlation coefficient = 0.78-0.96) with low- to high-quality evidence. Criterion validity was less investigated and mostly inconsistent (very low-to moderate-quality evidence) with a wide range of correlations (r = 0.40-0.93). CONCLUSION: Hip muscle strength testing using portable dynamometers is reliable. The use of portable dynamometers as clinical surrogates for measuring strength using an isokinetic dynamometer requires further investigation. Clinicians testing hip muscle strength with portable dynamometers should use external fixation seated for hip flexors, prone or supine for hip extensors, side-lying or supine for abductors and adductors, and prone and seated for internal and external rotators. J Orthop Sports Phys Ther 2023;53(11):655-672. Epub 3 October 2023. doi:10.2519/jospt.2023.12045.
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Antunez J, Malone ZC, Glaviano NR. Influence of self-perceived disability on squatting kinematics in individuals with patellofemoral pain. Clin Biomech (Bristol, Avon) 2023; 109:106089. [PMID: 37666039 DOI: 10.1016/j.clinbiomech.2023.106089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Revised: 08/15/2023] [Accepted: 08/29/2023] [Indexed: 09/06/2023]
Abstract
BACKGROUND Individuals with patellofemoral pain have a heterogeneous presentation of symptoms during functional tasks; however, biomechanical data often negates self-reported disability. The single leg squat is common in patellofemoral pain literature but may not be a pain provoking task for all individuals. Therefore, our study examined the influence of self-perceived squatting disability in individuals with patellofemoral pain on lower extremity squatting kinematics. METHODS We analyzed two-dimensional hip frontal plane projection angle, knee frontal plane projection angle, lateral trunk movement, and pelvic drop in 100 participants, 82 with patellofemoral pain and 18 pain-free controls. Participants with patellofemoral pain were dichotomized based on the level of disability reported during squatting on the anterior knee pain scale. An analysis of variance with post hoc testing was used to compare differences in lower extremity and trunk kinematics between groups, p < 0.05. FINDINGS Participants who reported only being able to squat with partial weight bearing had greater hip frontal plane projection angles than those who reported squatting painful each time (p = 0.017). The partial weight bearing group had greater knee frontal plane projection angles compared those who reported pain with repeated squatting and the pain-free group, (p < 0.034). We found no significant differences in lateral trunk motion or pelvic drop between groups. INTERPRETATION Individuals with patellofemoral pain who self-reported worse squatting disability had greater hip and knee frontal plane motion compared to individuals with less disability and pain-free controls. Clinicians and researchers should consider specific pain provoking tasks when evaluating and treating patients with patellofemoral pain.
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Affiliation(s)
- Joaquin Antunez
- Department of Kinesiology, University of Connecticut, Storrs, CT, United States of America
| | - Zachary C Malone
- Department of Kinesiology, University of Connecticut, Storrs, CT, United States of America
| | - Neal R Glaviano
- Department of Kinesiology, University of Connecticut, Storrs, CT, United States of America.
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Lopes HS, Waiteman MC, Priore LB, Glaviano NR, Bazett-Jones DM, Briani RV, Azevedo FM. There is more to the knee joint than just the quadriceps: A systematic review with meta-analysis and evidence gap map of hamstring strength, flexibility, and morphology in individuals with gradual-onset knee disorders. J Sport Health Sci 2023:S2095-2546(23)00077-7. [PMID: 37669706 DOI: 10.1016/j.jshs.2023.08.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Revised: 05/25/2023] [Accepted: 07/10/2023] [Indexed: 09/07/2023]
Abstract
BACKGROUND Impairments in hamstring strength, flexibility, and morphology have been associated with altered knee biomechanics, pain, and function. Determining the presence of these impairments in individuals with gradual-onset knee disorders is important and may indicate targets for assessment and rehabilitation. This systematic review aimed to synthesize the literature to determine the presence of impairments in hamstring strength, flexibility, and morphology in individuals with gradual-onset knee disorders. METHODS Five databases ((MEDLINE, Embase, CINAHL, SPORTDiscus, and Web of Science) were searched from inception to September 2022. Only studies comparing hamstring outcomes (e.g., strength, flexibility, and/or morphology) between individuals with gradual-onset knee disorders and their unaffected limbs or pain-free controls were included. Meta-analyses for each knee disorder were performed. Outcome-level certainty was assessed using the Grading of Recommendations Assessment, Development, and Evaluation, and evidence gap maps were created. RESULTS Seventy-nine studies across 4 different gradual-onset knee disorders (i.e., knee osteoarthritis (OA), patellofemoral pain (PFP), chondromalacia patellae, and patellar tendinopathy) were included. Individuals with knee OA presented with reduced hamstring strength compared to pain-free controls during isometric (standard mean difference (SMD) = -0.76, 95% confidence interval (95%CI) : -1.32 to -0.21) and concentric contractions (SMD = -0.97, 95%CI : -1.49 to -0.45). Individuals with PFP presented with reduced hamstring strength compared to pain-free controls during isometric (SMD = -0.48, 95%CI : -0.82 to -0.14), concentric (SMD = -1.07, 95%CI : -2.08 to -0.06), and eccentric contractions (SMD = -0.59, 95%CI : -0.97 to -0.21). No differences were observed in individuals with patellar tendinopathy. Individuals with PFP presented with reduced hamstring flexibility when compared to pain-free controls (SMD = -0.76, 95%CI : -1.15 to -0.36). Evidence gap maps identified insufficient evidence for chondromalacia patellae and hamstring morphology across all gradual-onset knee disorders. CONCLUSION Our findings suggest that assessing and targeting impairments in hamstring strength and flexibility during rehabilitation may be recommended for individuals with knee OA or PFP.
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Affiliation(s)
- Helder S Lopes
- School of Science and Technology, Physical Therapy Department, Sao Paulo State University (UNESP), Presidente Prudente 19060-900, Brazil.
| | - Marina C Waiteman
- School of Science and Technology, Physical Therapy Department, Sao Paulo State University (UNESP), Presidente Prudente 19060-900, Brazil
| | - Liliam B Priore
- School of Science and Technology, Physical Therapy Department, Sao Paulo State University (UNESP), Presidente Prudente 19060-900, Brazil
| | - Neal R Glaviano
- Department of Kinesiology, College of Agriculture, Health and Natural Resources, University of Connecticut, Storrs, CT 06269, USA
| | - David M Bazett-Jones
- School of Exercise and Rehabilitation Sciences, College of Health and Human Services, University of Toledo, Toledo, OH 43606, USA
| | - Ronaldo V Briani
- School of Science and Technology, Physical Therapy Department, Sao Paulo State University (UNESP), Presidente Prudente 19060-900, Brazil
| | - Fábio M Azevedo
- School of Science and Technology, Physical Therapy Department, Sao Paulo State University (UNESP), Presidente Prudente 19060-900, Brazil
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Glaviano NR, Kim S. Lower extremity muscle volume in females with patellofemoral pain and its relationships to hip and knee torque: A cross-sectional study. Phys Ther Sport 2023; 63:50-57. [PMID: 37506654 DOI: 10.1016/j.ptsp.2023.07.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Revised: 07/19/2023] [Accepted: 07/20/2023] [Indexed: 07/30/2023]
Abstract
OBJECTIVES Compare lower extremity muscle volume in females with patellofemoral pain (PFP) to a cohort of pain-free females and investigate the relationship between thigh and hip muscle volume and torque. DESIGN Cross-sectional. PARTICIPANTS Twenty-one females, 13 with PFP and 8 pain-free controls. MAIN OUTCOME MEASURES We quantified normalized lower extremity muscle volume (cm3/kg*m) via magnetic resonance imaging and isometric hip and thigh torque (Nm/kg) via a multimodal dynamometer. RESULTS Versus pain-free individuals, females with PFP had smaller muscle volume of the anterior hip (P < 0.019; d = 0.97-2.42), deep external rotators (P < 0.006; d = 1.0-3.93), hamstrings (P < 0.009; d = 1.09-2.12), rectus femoris (P < 0.001; d = 1.79), and vastus intermedius (P < 0.001; d = 1.88). There was no difference in muscle volume of the gluteus maximus (P = 0.311; d = 0.22), gluteus medius (P = 0.087; d = 0.87), vastus lateralis (P = 0.22; d = 0.39), and vastus medialis (P = 0.47; d = 0.04). Gluteus maximus volume was moderately correlated to hip abduction torque (r = 0.60; P = 0.03). Vasti muscles and semitendinosus volume were moderately correlated to knee extension (r = 0.57-0.69; P < 0.05) and flexion (r = 0.66; P = 0.01) torque, respectively. CONCLUSION Females with PFP present with lesser thigh and hip muscle volumes, with variability in volumetric profiles across participants. Lower extremity knee extension and hip abduction strength are moderately associated with the vasti and gluteus maximus muscle volume, respectively.
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Affiliation(s)
- Neal R Glaviano
- Department of Kinesiology, College of Agriculture, Health, and Natural Resources, University of Connecticut, Storrs, CT, USA; Institute for Sports Medicine, University of Connecticut, Storrs, CT, USA.
| | - Sungwan Kim
- Department of Kinesiology, College of Agriculture, Health, and Natural Resources, University of Connecticut, Storrs, CT, USA; Institute for Sports Medicine, University of Connecticut, Storrs, CT, USA
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Kim S, Roh Y, Glaviano NR, Park J. Quadriceps Neuromuscular Function During and After Exercise-Induced Fatigue in Patients With Patellofemoral Pain. J Athl Train 2023; 58:554-562. [PMID: 36395370 PMCID: PMC10496447 DOI: 10.4085/1062-6050-0348.22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/03/2023]
Abstract
CONTEXT Exercise-induced fatigue reduces muscle force production and motoneuron pool excitability. However, it is unclear if patients with patellofemoral pain (PFP) experience further loss in quadriceps neuromuscular function due to fatigue during exercise and postexercise. OBJECTIVE To observe how quadriceps maximal strength, activation, and force-generating capacity change during and after repetitive bouts of isokinetic knee-extension exercise in patients with PFP. DESIGN Cross-sectional study. SETTING Laboratory. PATIENTS OR OTHER PARTICIPANTS Twenty-two patients with PFP (visual analog scale mean pain severity = 4.2 of 10 cm, mean symptom duration = 38.6 months) and 19 healthy control individuals matched on age and body mass index. MAIN OUTCOME MEASURE(S) Quadriceps peak torque (PT), central activation ratio (CAR), and rate of torque development (RTD) were assessed at baseline and immediately after every 5 sets of knee-extension exercise (times 1-5). Participants continued knee-extension exercises until the baseline quadriceps PT dropped below 50% for 3 consecutive contractions. RESULTS No group-by-time interaction was observed for quadriceps PT (F5,195 = 1.03, P = .40). However, group-by-time interactions were detected for quadriceps CAR (F5,195 = 2.63, P= .03) and RTD (F5,195 = 3.85, P = .002). Quadriceps CAR (-3.6%, P = .04, Cohen d = 0.53) and RTD (-18.9%, P = .0008, Cohen d = 1.02) decreased between baseline and time 1 in patients with PFP but not in their healthy counterparts (CAR -1.9%, P = .86; RTD -9.8%, P = .22). Quadriceps RTD also decreased between times 4 and 5 in patients with PFP (-24.9%, P = .002, Cohen d = 0.89) but not in the healthy group (-0.9%, P = .99). CONCLUSIONS Patients with PFP appeared to experience an additional reduction in quadriceps activation, force-generating capacity, or both during the early and late stages of exercise compared with healthy individuals. Clinicians should be aware of such possible acute changes during exercise and postexercise and use fatigue-resistant rehabilitation programs for patients with PFP.
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Affiliation(s)
| | | | | | - Jihong Park
- Department of Sports Medicine, Kyung Hee University, Yongin, Korea
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Chaltron C, Sherman DA, Pamukoff DN, Bazett-Jones DM, Glaviano NR, Norte GE. Whole-body vibration reduces hamstrings neuromuscular function in uninjured individuals. Phys Ther Sport 2023; 60:17-25. [PMID: 36640639 DOI: 10.1016/j.ptsp.2023.01.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2022] [Revised: 01/06/2023] [Accepted: 01/07/2023] [Indexed: 01/11/2023]
Abstract
OBJECTIVES Despite the growing use of whole-body vibration (WBV) to enhance quadriceps neuromuscular function, the hamstrings-specific response is unclear among those without neuromuscular impairment, which is important to inform performance-based recommendations. Our objective was to determine the immediate and prolonged effects of WBV on hamstrings and quadriceps neuromuscular function in uninjured individuals. DESIGN Crossover. SETTING Laboratory. PARTICIPANTS Nineteen, recreationally active individuals performed WBV and control exercise protocols, consisting of six 1-min repetitions of isometric squats, on separate days in a randomized order. MAIN OUTCOME MEASURES Electromyographic (EMG) amplitude, antagonist-to-agonist co-activation, rate of torque development, and peak torque of the hamstrings and quadriceps were measured pre-, immediately post-, and 20 min post-condition. Percentage change scores were calculated from baseline to each post-measurement. RESULTS A condition main effect indicated that WBV reduced agonist semitendinosus EMG amplitudes more than the control (-12.1% vs. -1.5%, p < .001). Antagonist vastus medialis EMG amplitudes were reduced immediately, but not 20 min following WBV (-7.1% vs. 3.5%, p < .001). CONCLUSIONS WBV induced an inhibitory effect on medial hamstrings activity during knee flexion contraction in a majority of our sample, yet this response was not uniformly observed and its functional relevance remains unclear in an uninjured population.
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Affiliation(s)
- Cale Chaltron
- University of Kentucky, Athletics Department, Lexington, KY, 40506, United States.
| | - David A Sherman
- Live4 Physical Therapy and Wellness Advising, 525 Massachusetts Ave, Suite 206B, Acton, MA, 01720, United States; Boston University, Department of Physical Therapy and Athletic Training, 635 Commonwealth Avenue, Boston, MA, 02215, United States.
| | - Derek N Pamukoff
- Western University, School of Kinesiology, 1151 Richmond St, London, ON, N6A 3K7, UK.
| | - David M Bazett-Jones
- University of Toledo (study Site), Department of Exercise and Rehabilitation Sciences, 2801 W. Bancroft St., Health and Human Services, 2505H, Mail Stop 119, Toledo, OH, 43606, United States.
| | - Neal R Glaviano
- University of Connecticut, Department of Kinesiology, 2095 Hillside Rd, U-1110, Storrs, CT, 06269, United States.
| | - Grant E Norte
- University of Toledo (study Site), Department of Exercise and Rehabilitation Sciences, 2801 W. Bancroft St., Health and Human Services, 2505H, Mail Stop 119, Toledo, OH, 43606, United States.
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Zuk EF, Kim S, Burland JP, Glaviano NR. The Comparison of Psychological Barriers Between Individuals with a History of Anterior Knee Pain, Anterior Cruciate Ligament Reconstruction, and Healthy Individuals. Int J Sports Phys Ther 2023; 18:92-101. [PMID: 36793558 PMCID: PMC9897036 DOI: 10.26603/001c.68045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Accepted: 11/03/2022] [Indexed: 02/05/2023] Open
Abstract
Background Psychological barriers due to anterior knee pain (AKP) and anterior cruciate ligament reconstruction (ACLR) may have a direct impact on an individual's return to physical activity. A comprehensive understanding of these psychological barriers in individuals with AKP and ACLR may help clinicians to develop and implement better treatment strategies to address deficits that may exist in these individuals. Hypothesis/Purpose The primary purpose of this study was to evaluate fear-avoidance, kinesiophobia, and pain catastrophizing in individuals with AKP and ACLR compared with healthy individuals. The secondary purpose was to directly compare psychological characteristics between the AKP and ACLR groups. It was hypothesized that 1) individuals with AKP and ACLR would self-report worse psychosocial function than healthy individuals and 2) the extent of the psychosocial impairments between the two knee pathologies would be similar. Study Design Cross-sectional study. Methods Eighty-three participants (28 AKP, 26 ACLR, and 29 healthy individuals) were analyzed in this study. Fear avoidance belief questionnaire (FABQ) with the physical activity (FABQ-PA) and sport (FABQ-S) subscales, Tampa scale of Kinesiophobia (TSK-11) and pain catastrophizing scale (PCS) assessed psychological characteristics. Kruskal-Wallis tests were used to compare the FABQ-PA, FABQ-S, TSK-11, and PCS scores across the three groups. Mann-Whitney U tests were performed to determine where group differences occurred. Effect sizes (ES) were calculated with the Mann-Whitney U z-score divided by the square root of the sample size. Results Individuals with AKP or ACLR had significantly worse psychological barriers compared to the healthy individuals for all questionnaires (FABQ-PA, FABQ-S, TSK-11, and PCS) (p<0.001, ES>0.86). There were no differences between the AKP and ACLR groups (p≥0.67), with a medium ES (-0.33) in the FABQ-S between AKP and ACLR groups. Conclusion Greater psychological scores indicate impaired psychological readiness to perform physical activity. Clinicians should be aware of fear-related beliefs following knee-related injuries and are encouraged to measure psychological factors during the rehabilitation process. Level of Evidence 2.
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Affiliation(s)
- Emma F Zuk
- Department of Kinesiology University of Connecticut
- Institute for Sports Medicine University of Connecticut
| | - Sungwan Kim
- Department of Kinesiology University of Connecticut
- Institute for Sports Medicine University of Connecticut
| | - Julie P Burland
- Department of Kinesiology University of Connecticut
- Institute for Sports Medicine University of Connecticut
| | - Neal R Glaviano
- Department of Kinesiology University of Connecticut
- Institute for Sports Medicine University of Connecticut
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12
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Glaviano NR, Mangum LC, Bazett-Jones DM, DiStefano LJ, Toland MD, Boling M. Strength Training Rehabilitation Incorporating Power Exercises (STRIPE) for individuals with patellofemoral pain: a randomised controlled trial protocol. BMJ Open Sport Exerc Med 2023; 9:e001482. [PMID: 36684710 PMCID: PMC9853263 DOI: 10.1136/bmjsem-2022-001482] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/31/2022] [Indexed: 01/19/2023] Open
Abstract
Patellofemoral pain (PFP) is a chronic condition that presents with patellar pain during various daily and recreational activities. Individuals with PFP have a wide range of impairments that result in long-term disability and reduced quality of life. Current interventions target hip muscle weakness with strength-based exercises, but recurrence rates are as high as 90%. A single feasibility study demonstrated success with power-based exercises; however, there is limited evidence evaluating pain or self-reported function in larger cohorts, and no study has assessed recurrence rates. This protocol details a study evaluating a strength-based rehabilitation programme compared with a strength-based programme incorporating power-based exercises in individuals with PFP. This single-blinded randomised controlled trial will evaluate 88 participants with PFP, aged 18-40 years old. Participants will be recruited from three universities, the surrounding community and sports medicine clinics. Participants will receive three telemedicine rehabilitation sessions a week for 6 weeks. The rehabilitation programme will consist of either strength-based exercises or a combination of power and strength-based exercises. Pain, subjective function and recurrence rates will be assessed at baseline, immediately after the intervention and at four follow-up time points: 6-month, 12-month, 18-month and 24-month postintervention. We will also assess neuromuscular function of the hips and global rating of change at each postintervention time point. Trial registration number NCT05403944.
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Affiliation(s)
- Neal R Glaviano
- Department of Kinesiology, University of Connecticut, Storrs, Connecticut, USA
| | - L Colby Mangum
- Institute of Exercise Physiology and Rehabilitation Science, University of Central Florida, Orlando, Florida, USA
| | - David M Bazett-Jones
- Department of Exercise & Rehabilitation Sciences, The University of Toledo, Toledo, Ohio, USA
| | - Lindsay J DiStefano
- Department of Kinesiology, University of Connecticut, Storrs, Connecticut, USA
| | - Michael D Toland
- The Herb Innovation Center, Judith Herb College of Education, University of Toledo, Toledo, Ohio, USA
| | - Michelle Boling
- Department of Clinical & Applied Movement Sciences, University of North Florida, Jacksonville, Florida, USA
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13
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Bazett-Jones DM, Waiteman MC, Glaviano NR. Depth of single-leg squat influences the two-dimensional analysis of knee, hip, and pelvis frontal plane motion in pain-free women. Gait Posture 2022; 98:279-282. [PMID: 36219951 DOI: 10.1016/j.gaitpost.2022.10.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Revised: 08/15/2022] [Accepted: 10/02/2022] [Indexed: 02/02/2023]
Abstract
BACKGROUND The single-leg squat (SLS) is often used to measure two-dimensional frontal plane motion; however, there is a variability in the SLS depth across studies. RESEARCH QUESTION Are knee abduction (KABD), hip adduction (HADD), pelvic drop (PD), and lateral trunk flexion (LTF) angles different at greater knee flexion angles during a SLS? METHODS Twenty pain-free females (age=22.3 ± 1.1 years, height=1.68 ± 0.06 m, mass=63.1 ± 11.7 kg) participated in this cross-sectional study. Participants performed five SLSs to the lowest depth comfortable, keeping pace with a metronome, while being video recorded in the frontal and sagittal planes. The middle three SLSs were used for analysis. KABD, HADD, PD, and LTF angles were measured at 30º, 45º, 60º, 75º, and 90º of knee flexion using extracted images. Linear mixed model analyses were used to compare across knee flexion angles and clinical significance was determined by comparing angle changes to the standard error of measurement (SEM). RESULTS We observed significant differences for KABD (F=14.69, p < .001), HADD (F=46.29, p < .001), and PD (F=27.27, p < .001) among knee flexion angles. Post-hoc analyses revealed that KABD significantly increased at every increase of knee flexion angle (p ≤ .05, d=0.54-1.95), as did HADD (p ≤ .05, d=0.64-3.85) and PD (p ≤ .05, d=0.61-3.03). Changes in KABD, HADD, and PD often exceeded SEM for all changes in knee flexion angles. SIGNIFICANCE Knee, hip, and pelvic frontal plane motions are influenced by knee flexion angles during 2D analysis of a SLS task. Our results highlight the importance of standardizing SLS depth during research and clinical practice to ensure appropriate comparisons across measurements.
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Affiliation(s)
- David M Bazett-Jones
- Department of Exercise and Rehabilitation Sciences, College of Health and Human Services, The University of Toledo, Toledo, OH, USA.
| | - Marina Cabral Waiteman
- Department of Exercise and Rehabilitation Sciences, College of Health and Human Services, The University of Toledo, Toledo, OH, USA; São Paulo State University (UNESP), Presidente Prudente, Brazil
| | - Neal R Glaviano
- Department of Kinesiology, College of Agriculture, Health and Natural Resources, University of Connecticut, Storrs, CT, USA; Institute for Sports Medicine, University of Connecticut, Storrs, CT, USA
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14
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Takeno K, Ingersoll CD, Glaviano NR, Khuder S, Norte GE. Neuromuscular function of the shoulder girdle and upper extremity musculature in individuals with a history of glenohumeral labral repair. Scand J Med Sci Sports 2022; 32:1377-1388. [PMID: 35612722 DOI: 10.1111/sms.14196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Revised: 03/10/2022] [Accepted: 05/05/2022] [Indexed: 11/29/2022]
Abstract
The purpose of this study was to compare neuromuscular function in the upper extremity musculature between individuals with glenohumeral labrum repair and uninjured controls. This cross-sectional study examined 16 individuals with a primary, unilateral glenohumeral labral repair (male/female: 13/3, age: 24.1 ± 5.0 years, time from surgery: 36.7 ± 33.3 months) and 14 uninjured individuals (male/female: 11/3, age: 23.8 ± 2.7 years) matched by age, sex, activity level, and limb dominance participated. Mass-normalized shoulder abduction and wrist flexion maximal voluntary isometric contraction (MVIC) torque, motoneuron pool excitability of the flexor carpi radialis (Hoffmann reflex), and corticospinal excitability of the upper trapezius, middle deltoid, and flexor carpi radialis (active motor threshold [AMT]) were evaluated. Dependent and independent t-tests were used to assess between-limb and between-group comparisons. Cohen's d effect sizes with 95% confidence intervals were used to quantify the magnitude of differences observed. Within the injured group, the involved limb had lesser shoulder abduction MVIC torque (p < 0.001, d = 1.16) and higher AMT for the upper trapezius (p = 0.01, d = 0.81) compared with the contralateral limb. The labral repair group had lesser shoulder abduction MVIC torque (p < 0.001, d = 1.17) and Hoffmann reflex (p = 0.01, d = 0.99), as well as higher AMT for the upper trapezius (p < 0.001, d = 1.23) in their involved limb compared with the control group. Large magnitude neuromuscular impairments are present beyond 6 months from glenohumeral labral repair, suggesting potential origins of impairments to be addressed during post-operative rehabilitation.
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Affiliation(s)
- Katsumi Takeno
- Department of Kinesiology, University of North Georgia, Dahlonega, Georgia, USA
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15
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Willy RW, Hoglund L, Glaviano NR, Bolgla LA, Bazett-Jones DM. Survey of confidence and knowledge to manage patellofemoral pain in readers versus NonReaders of the physical therapy clinical practice guideline. Phys Ther Sport 2022; 55:218-228. [DOI: 10.1016/j.ptsp.2022.04.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2021] [Revised: 04/12/2022] [Accepted: 04/13/2022] [Indexed: 12/21/2022]
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16
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Glaviano NR, Holden S, Bazett-Jones DM, Singe SM, Rathleff MS. Living well (or not) with patellofemoral pain: A qualitative study. Phys Ther Sport 2022; 56:1-7. [DOI: 10.1016/j.ptsp.2022.05.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Revised: 05/19/2022] [Accepted: 05/22/2022] [Indexed: 11/29/2022]
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Abstract
Individuals with patellofemoral pain (PFP) experience discomfort during various functional activities. Long-term pain is a common consequence of PFP, yet little is known about daily pain variability. Our study consisted of 25 individuals with PFP who completed the Anterior Knee Pain Scale (AKPS) and recorded their daily pain over 10 days. Pain was evaluated using 2 measures of intensity (baseline pain, 10-day average pain) and 2 measures of variability (mean square of successive differences, probability of acute change). Associations between AKPS and the 4 pain measures were calculated with Pearson correlations. We calculated a linear regression to examine the amount of variance in the AKPS explained by the 4 pain measures. Greater mean square of successive differences values were moderately associated with lesser AKPS scores (r = -0.648, P < .001). Mean square of successive differences and 10-day averaged pain were the strongest predictors of AKPS (R2 = 0.565, P < .001). Pain variability provided a unique perspective on the pain experience and predicted patient-oriented function in individuals with PFP.
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Affiliation(s)
| | - Mikayla M. Simon
- School of Exercise and Rehabilitation Sciences, University of Toledo, OH
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18
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Zambarano EK, Bazett-Jones DM, de Oliveira Silva D, Barton CJ, Glaviano NR. Confidence and Knowledge of Athletic Trainers in Managing Patellofemoral Pain. J Athl Train 2022; 57:79-91. [PMID: 35040987 PMCID: PMC8775279 DOI: 10.4085/1062-6050-0279.21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
CONTEXT Patellofemoral pain (PFP) is prevalent and challenging to manage. Most patients with PFP are unsatisfied with their knee function at 6 months after treatment and report ongoing pain up to 16 years after diagnosis. The confidence and knowledge of athletic trainers (ATs) in providing evidence-based care to people with PFP is unknown. OBJECTIVE To investigate the confidence and knowledge of ATs in the diagnosis, risk factors, prognosis, and treatment with current evidence for PFP. DESIGN Cross-sectional study. SETTING Online survey. PATIENT OR OTHER PARTICIPANTS A random sample of 3000 ATs were invited to participate; 261 completed the survey (10% participation rate, 88% completion rate). MAIN OUTCOME MEASURES(S) We surveyed AT demographics, confidence in PFP management, and knowledge related to diagnosis, risk factors, prognosis, and treatment. The confidence and knowledge of ATs in managing PFP was assessed. Their beliefs about evidence were compared with the available evidence (ie, consensus statements, position statements, systematic reviews). RESULTS Of the ATs surveyed, 91% were confident that their management of PFP aligned with the current evidence, but only 59% were confident in identifying risk factors for PFP development. In addition, 91% to 92% of ATs agreed that quadriceps and hip muscle weakness were risk factors for PFP, which aligns with the current evidence for the former but not the latter. Moreover, 93% to 97% of ATs' responses related to therapeutic exercise aligned with current evidence. However, 35% to 48% supported the use of passive treatments, such as electrophysical agents and ultrasound, which did not align with the current evidence. CONCLUSIONS Most ATs were aware of supporting evidence for therapeutic exercise in PFP management and were confident providing it, creating a strong foundation for evidence-based care. However, varying levels of awareness of the evidence related to risk factors and passive treatments for PFP highlight the need for professional development initiatives to better align ATs' knowledge with the current evidence.
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Affiliation(s)
- Erika K. Zambarano
- School of Exercise and Rehabilitation Sciences, University of Toledo, OH
| | | | - Danilo de Oliveira Silva
- La Trobe Sport and Exercise Medicine Research Centre, School of Allied Health, Human Services, and Sport, La Trobe University, Bundoora, Australia
| | - Christian J. Barton
- La Trobe Sport and Exercise Medicine Research Centre, School of Allied Health, Human Services, and Sport, La Trobe University, Bundoora, Australia
,Department of Surgery, St Vincent's Hospital, University of Melbourne, Australia
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19
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Smith S, Rush J, Glaviano NR, Murray A, Bazett-Jones D, Bouillon L, Blackburn T, Norte G. Sex influences the relationship between hamstrings-to-quadriceps strength imbalance and co-activation during walking gait. Gait Posture 2021; 88:138-145. [PMID: 34034026 DOI: 10.1016/j.gaitpost.2021.05.019] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Revised: 05/03/2021] [Accepted: 05/18/2021] [Indexed: 02/02/2023]
Abstract
BACKGROUND While traditionally viewed as a beneficial adaptation to preserve stability in the presence of knee pathology, excessive muscle co-activation may be detrimental for joint health when extrapolated to repetitive movement patterns over time. Lesser hamstrings strength relative to the quadriceps (low H:Q strength ratio) may influence neuromuscular patterns about the knee, as it is reported to increase risk for lower extremity injury among healthy females. RESEARCH QUESTION Does the relationship between H:Q strength ratio and H:Q co-activation differ between sexes during walking and jogging? METHODS We used a descriptive laboratory study to assess hamstrings and quadriceps strength and muscle activity patterns during the loading response of treadmill walking gait (1.34 m/s) and jogging (2.68 m/s) in healthy males (n = 11) and females (n = 12). Concentric-concentric peak isokinetic torque (60°/s) was used to derive the H:Q strength ratio, which was treated as an explanatory variable for H:Q co-activation indices (medial, lateral, composite) and constituent EMG amplitudes. Bivariate correlations (Pearson r or Spearman ρ) were used for analysis. RESULTS In females, lesser H:Q strength ratios were associated with greater lateral co-activation (r=-.715, P = .007) and biceps femoris EMG amplitude (ρ=-.532, P = .046) during the loading response of walking gait. When controlling for sex differences in knee flexion, the relationship between lesser H:Q strength ratios and greater lateral co-activation was preserved (partial r=-.699, P = .012); yet, biceps femoris EMG was no longer correlated (partial r=-.331, P = .175). Significant relationships were not observed among male participants during walking or in either sex during jogging (all P > .05). SIGNIFICANCE Collectively, these data provide evidence of a sex-specific neuromuscular pattern with implications for joint health. Excessive lateral co-activation may consequently promote a greater valgus moment and ligamentous strain. Future investigations would benefit from understanding the influence of hamstrings-dominant exercise programs on the neuromuscular patterns of the knee.
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Affiliation(s)
- Samantha Smith
- Athletic Training Program, School of Exercise and Rehabilitation Sciences, University of Toledo, Toledo, OH, USA.
| | - Justin Rush
- Exercise Science Program, School of Exercise and Rehabilitation Sciences, University of Toledo, Toledo, OH, USA.
| | - Neal R Glaviano
- Department of Kinesiology, University of Connecticut, Storrs, CT, USA.
| | - Amanda Murray
- Physical Therapy Program, School of Exercise and Rehabilitation Sciences, University of Toledo, Toledo, OH, USA.
| | - David Bazett-Jones
- Athletic Training Program, School of Exercise and Rehabilitation Sciences, University of Toledo, Toledo, OH, USA.
| | - Lucinda Bouillon
- Physical Therapy Program, School of Exercise and Rehabilitation Sciences, University of Toledo, Toledo, OH, USA.
| | - Troy Blackburn
- Department of Exercise and Sport Science, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.
| | - Grant Norte
- Athletic Training Program, School of Exercise and Rehabilitation Sciences, University of Toledo, Toledo, OH, USA.
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Abstract
CONTEXT Anterior knee pain (AKP) is ubiquitous in early-career military members and exacerbated during functional tasks required during military duties. Therefore, it is important to understand risk of this condition in male and female tactical athletes in diverse military occupations. OBJECTIVE To assess sex and occupation on AKP risk in military members. DESIGN Descriptive Epidemiology Study. SETTING United States Armed Forces. Patients All military members diagnosed with anterior or retro-patellar pain, patellar instability, knee tendinopathy on their initial encounter from 2006 to 2015. OUTCOME MEASURES The Defense Medical Epidemiology Database was queried for the number of individuals with AKP. Relative risk (RR) and chi-square statistics were calculated in the assessment of sex and occupational category. Regressions were calculated to determine association between service branch, sex, and AKP across time. RESULTS From 2006-2015, a total of 151,263 enlisted and 14,335 officer services members were diagnosed with AKP. Enlisted females had an incidence rate of 16.7 per 1000 person-years compared to the enlisted male service members with an incidence rate of 12.7 per 1000 person-years (RR: 1.32, 95%CI: 1.30-1.34, p<0.001) across all AKP diagnoses. Female officers had an incidence rate of 10.7 per 1,000 person-years compared to male officers at an incidence rate of 5.3 per 1000 person-years (RR: 2.01, 95%CI: 1.94-2.09). Differences in risk were also noted across military occupation for both enlisted and officer service members (p<.05). CONCLUSION Sex and military occupation were salient factors for AKP risk. Evaluation of training requirements and developing interventions programs across military occupation could serve as a focus for future research aiming to mitigate associated risk factors of AKP.
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Affiliation(s)
- Neal R Glaviano
- 1Department of Kinesiology, University of Connecticut, Storrs, CT. . Twitter: @NealGlaviano
| | - Michelle C Boling
- 2Brooks College of Health, University of North Florida, Jacksonville, FL. . Twitter: @mcboling23
| | - John J Fraser
- 1Department of Kinesiology, University of Connecticut, Storrs, CT. . Twitter: @NealGlaviano
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Sherman DA, Glaviano NR, Norte GE. Hamstrings Neuromuscular Function After Anterior Cruciate Ligament Reconstruction: A Systematic Review and Meta-Analysis. Sports Med 2021; 51:1751-1769. [PMID: 33609272 DOI: 10.1007/s40279-021-01433-w] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/01/2021] [Indexed: 12/23/2022]
Abstract
BACKGROUND Hamstrings neuromuscular function is a crucial component of functional movement, and changes after anterior cruciate ligament (ACL) injury contribute to risk factors for secondary injury and long-term sequelae. To effectively treat muscular impairments, an accurate understanding of hamstrings neuromuscular function in patients with ACL reconstruction (ACLR) is needed. OBJECTIVE A systematic review and meta-analysis were undertaken to describe and quantify hamstrings neuromuscular function in individuals with ACLR compared to controls. METHODS We searched PubMed, Web of Science, SPORTDiscus, CINAHL, and EBSCOhost databases in October of 2020 for studies evaluating the difference between hamstrings electromyography (EMG) between individuals with ACLR and controls. Two independent reviewers assessed each paper for inclusion and quality. Means and standard deviations were extracted from each included study to allow random-effect size (ES) meta-analysis calculations for comparison of results. RESULTS Thirty-four studies were included for final review. From these, 5 categories of neuromuscular outcomes were identified, and studies were grouped accordingly: (1) muscle activation levels (EMG amplitude), (2) co-activation, (3) onset timing, (4) electromechanical delay, and (5) time-to-peak activity. Moderate to strong evidence indicates that individuals with ACLR demonstrate higher hamstrings EMG amplitude (normalized to % maximum voluntary isometric contraction) and hamstrings-to-quadriceps co-activation during gait and stair ambulation compared to controls. In addition, there was moderate evidence of longer electromechanical delay during knee flexion and greater hamstrings-to-quadriceps co-activation during knee extension compared to controls. CONCLUSIONS Greater hamstrings EMG amplitude and co-activation during gait and ambulation tasks and longer electromechanical delay of the hamstrings in individuals with ACLR align with clinical impairments following ACLR and have implications for re-injury risk and long-term joint health, thus warranting attention in rehabilitation.
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Affiliation(s)
- David A Sherman
- School of Exercise and Rehabilitation Sciences, College of Health and Human Services, The University of Toledo, 2801 W. Bancroft St., HH 2505E, Mail Stop 119, Toledo, OH, 43606, USA.
| | - Neal R Glaviano
- Department of Kinesiology, College of Agriculture, Health and Natural Resources, University of Connecticut, Storrs, CT, USA
| | - Grant E Norte
- School of Exercise and Rehabilitation Sciences, College of Health and Human Services, The University of Toledo, 2801 W. Bancroft St., HH 2505E, Mail Stop 119, Toledo, OH, 43606, USA
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Zambarano EK, Bouillon L, Glaviano NR. Relationship between lumbopelvic-hip complex stability, muscle activity, and 2-dimensional kinematics of the trunk and lower extremity. Phys Ther Sport 2021; 47:7-14. [DOI: 10.1016/j.ptsp.2020.10.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Revised: 10/01/2020] [Accepted: 10/04/2020] [Indexed: 01/19/2023]
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Kingston B, Murray A, Norte GE, Glaviano NR. Validity and reliability of 2-dimensional trunk, hip, and knee frontal plane kinematics during single-leg squat, drop jump, and single-leg hop in females with patellofemoral pain. Phys Ther Sport 2020; 45:181-187. [PMID: 32823213 DOI: 10.1016/j.ptsp.2020.07.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2020] [Revised: 07/15/2020] [Accepted: 07/18/2020] [Indexed: 02/07/2023]
Abstract
OBJECTIVES To investigate validity and between-session reliability of frontal plane trunk, hip, and knee kinematics during three functional tasks in females with patellofemoral pain (PFP). DESIGN Observational. SETTING Research Laboratory. PARTICIPANTS 20 females with PFP (22.7 ± 3.2 years, 69.9 ± 9.2 kg, 167.7 ± 9.6 cm). MAIN OUTCOME MEASURES Trunk, hip, and knee frontal plane peak angles during the single leg squat (SLS), drop vertical jump (DVJ), and single leg hop (SLH) kinematics were evaluated using 2-dimensional (2D) and 3-dimensional (3D) motion capture. Participants returned to the lab one week later and competed a second 2D analysis of the functional tasks. Concurrent validity was assessed by evaluating relationship between 2D and 3D frontal plane kinematics with Pearson correlations. Between-session reliability was assessed by evaluating 2D kinematics with intraclass correlation coefficients by a single assessor. RESULTS Moderate to strong correlations (r = 0.55-0.76, p < .05) were found for frontal plane hip kinematics during all three tasks and the trunk during the SLH. Frontal plane kinematics demonstrated good to excellent test-retest reliability for each of the three tasks, (ICC (2,1) = 0.70-0.90). CONCLUSION 2D hip joint angles during the three functional tasks were the only valid frontal plane angles. Trunk, hip, and knee 2D frontal plane kinematics ranged between good-excellent reliability.
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Affiliation(s)
- Brianna Kingston
- School of Exercise and Rehabilitation Sciences, University of Toledo, Toledo, OH, USA
| | - Amanda Murray
- School of Exercise and Rehabilitation Sciences, University of Toledo, Toledo, OH, USA
| | - Grant E Norte
- School of Exercise and Rehabilitation Sciences, University of Toledo, Toledo, OH, USA
| | - Neal R Glaviano
- School of Exercise and Rehabilitation Sciences, University of Toledo, Toledo, OH, USA.
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Baellow A, Glaviano NR, Hertel J, Saliba SA. Lower Extremity Biomechanics During a Drop-Vertical Jump and Muscle Strength in Women With Patellofemoral Pain. J Athl Train 2020; 55:615-622. [PMID: 32320284 DOI: 10.4085/1062-6050-476-18] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
CONTEXT Patellofemoral pain (PFP) is one of the most prevalent knee conditions observed in women. Current research suggests that individuals with PFP have altered muscle activity, kinematics, and kinetics during functional tasks. However, few authors have examined differences in lower extremity biomechanics in this population during the drop-vertical jump (DVJ). OBJECTIVE To determine how lower extremity electromyography, kinematics, and kinetics during a DVJ and lower extremity isometric strength differed between women with and those without PFP. DESIGN Cross-sectional study. SETTING Laboratory. PATIENTS OR OTHER PARTICIPANTS Fifteen healthy women (age = 20.23 ± 1.39 years, height = 169.32 ± 5.38 cm, mass = 67.73 ± 9.57 kg) and 15 women with PFP (age = 22.33 ± 3.49 years, height = 166.42 ± 6.01 cm, mass = 65.67 ± 13.75 kg). INTERVENTION(S) Three trials of a DVJ. MAIN OUTCOME MEASURE(S) Surface electromyography, kinematics, and kinetics were collected simultaneously during a DVJ. Lower extremity strength was measured isometrically. Independent-samples t tests were performed to assess group differences. RESULTS Normalized muscle activity in the vastus medialis (healthy group = 120.84 ± 80.73, PFP group = 235.84 ± 152.29), gluteus maximus (healthy group = 43.81 ± 65.63, PFP group = 13.37 ± 13.55), and biceps femoris (healthy group = 36.68 ± 62.71, PFP group = 11.04 ± 8.9) during the landing phase of the DVJ differed between groups. Compared with healthy women, those with PFP completed the DVJ with greater hip internal-rotation moment (0.04 ± 0.28 N/kg versus 0.06 ± 0.14 N/kg, respectively) and had decreased knee-flexion excursion (76.76° ± 7.50° versus PFP = 74.14° ± 19.85°, respectively); they took less time to reach peak trunk flexion (0.19 ± 0.01 seconds versus 0.19 ± 0.02 seconds, respectively) and lateral trunk flexion (0.12 ± 0.07 seconds versus 0.11 ± 0.04 seconds, respectively). CONCLUSIONS During the DVJ, women with PFP had increased hip internal-rotation moment and decreased knee-flexion excursion with less time to peak trunk flexion and lateral flexion. Muscle activation was increased in the vastus medialis but decreased in the gluteus maximus and biceps femoris. This suggests that altered motor-unit recruitment in the hip and thigh may result in changes in biomechanics during a DVJ that are often associated with an increased risk of injury.
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Affiliation(s)
- Andrea Baellow
- Exercise and Sport Injury Laboratory, University of Virginia, Charlottesville
| | | | - Jay Hertel
- Exercise and Sport Injury Laboratory, University of Virginia, Charlottesville
| | - Susan A Saliba
- Exercise and Sport Injury Laboratory, University of Virginia, Charlottesville
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Glaviano NR, Saliba S. Differences in Gluteal and Quadriceps Muscle Activation During Weight-Bearing Exercises Between Female Subjects With and Without Patellofemoral Pain. J Strength Cond Res 2019; 36:55-62. [DOI: 10.1519/jsc.0000000000003392] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Glaviano NR, Bazett-Jones DM. Influence of Testing Position on Hip Torque and Relationships with Frontal Plane Kinematics in Females. Med Sci Sports Exerc 2019. [DOI: 10.1249/01.mss.0000560660.52377.8f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Mangum LC, Glaviano NR, Hryvniak D, Hart JM, Hertel J, Saliba SA. Muscle Thickness And Strength Relationships In Patients With Patellofemoral Pain Before And After Rehabilitation. Med Sci Sports Exerc 2019. [DOI: 10.1249/01.mss.0000562030.05350.bf] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Glaviano NR, Bazett-Jones DM, Norte G. Gluteal muscle inhibition: Consequences of patellofemoral pain? Med Hypotheses 2019; 126:9-14. [DOI: 10.1016/j.mehy.2019.02.046] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2018] [Revised: 02/05/2019] [Accepted: 02/26/2019] [Indexed: 11/30/2022]
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Takeno K, Glaviano NR, Norte GE, Ingersoll CD. Therapeutic Interventions for Scapular Kinematics and Disability in Patients With Subacromial Impingement: A Systematic Review. J Athl Train 2019; 54:283-295. [PMID: 30829536 DOI: 10.4085/1062-6050-309-17] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
CONTEXT Impaired scapular kinematics are commonly reported in patients with subacromial impingement syndrome (SIS). Various therapeutic interventions designed to improve scapular kinematics and minimize pain and disability have been described in the literature. However, the short- and long-term benefits of these interventions are unclear. OBJECTIVE To determine the effects of specific short- and long-term therapeutic interventions on scapular kinematics and disability in patients with SIS. DATA SOURCES We searched PubMed, CINAHL, and SPORTDiscus databases from their origins to January 2018 using a combination of the key words scapular kinematics AND (shoulder dysfunction OR subacromial impingement) and conducted a manual search by reviewing the references of the identified papers. STUDY SELECTION Studies were included if (1) preintervention and postintervention measures were available; (2) patient-reported outcomes were reported; (3) scapular kinematics measures at 90° of ascending limb elevation in the scapular plane were included; (4) SIS was diagnosed in participants or participants self-reported symptoms of SIS; (5) they were original clinical studies published in English; and (6) the sample sizes, means, and measure of variability for each group were reported. DATA EXTRACTION Seven studies were found. Sample sizes, means, and standard deviations of scapular upward rotation, posterior tilt, and internal rotation at 90° of ascending limb elevation on the scapular plane and the Disabilities of the Arm, Shoulder and Hand scores were extracted. DATA SYNTHESIS Standardized mean differences between preintervention and postintervention measures with 95% confidence intervals (CIs) were calculated. We observed that the Disabilities of the Arm, Shoulder and Hand scores improved (mean difference = 0.85; 95% CI = 0.54, 1.16) but did not observe changes in scapular upward rotation (mean difference = -0.04; 95% CI = -0.31, 0.22), posterior tilt (mean difference = -0.09; 95% CI = -0.32, 0.15), or internal rotation (mean difference = 0.06; 95% CI = -0.19, 0.31). CONCLUSIONS The short- and long-term therapeutic interventions for SIS improved patient-reported outcomes but not scapular kinematics. The identified improvements in shoulder pain and function were not likely explained by changes in scapular kinematics.
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Affiliation(s)
- Katsumi Takeno
- College of Health and Human Services, University of Toledo, OH
| | - Neal R Glaviano
- College of Health and Human Services, University of Toledo, OH
| | - Grant E Norte
- College of Health and Human Services, University of Toledo, OH
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Glaviano NR, Marshall AN, Mangum LC, Hart JM, Hertel J, Russell S, Saliba SA. Impairment-Based Rehabilitation With Patterned Electrical Neuromuscular Stimulation and Lower Extremity Function in Individuals With Patellofemoral Pain: A Preliminary Study. J Athl Train 2019; 54:255-269. [PMID: 30721093 DOI: 10.4085/1062-6050-490-17] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
CONTEXT Patellofemoral pain (PFP) is a chronic condition that presents with lower extremity muscle weakness, decreased flexibility, subjective functional limitations, pain, and decreased physical activity. Patterned electrical neuromuscular stimulation (PENS) has been shown to affect muscle activation and pain after a single treatment, but its use has not been studied in a rehabilitation trial. OBJECTIVE To determine the effects of a 4-week impairment-based rehabilitation program using PENS on subjective function, pain, strength, range of motion, and physical activity in individuals with PFP. DESIGN Randomized controlled trial. SETTING Laboratory. PATIENTS OR OTHER PARTICIPANTS A total of 21 patients with PFP (5 males, 16 females; age = 23.4 ± 7.6 years, height = 168.0 ± 7.5 cm, mass = 69.0 ± 19.5 kg). INTERVENTION(S) Participants completed a 4-week supervised rehabilitation program in conjunction with random assignment to receive PENS or sham treatments. MAIN OUTCOME MEASURE(S) Subjective function, pain, strength, range of motion, and physical activity levels were assessed prerehabilitation and postrehabilitation. Subjective function and pain were also assessed at 6 and 12 months postrehabilitation. Repeated-measures analyses of variance and Tukey post hoc testing were conducted with α ≤ .05. We calculated Cohen d effect sizes with 95% confidence intervals. RESULTS Both groups had statistically and clinically meaningful differences in subjective function, pain, strength, range of motion, and activity level after 4 weeks of impairment-based rehabilitation. Improved subjective function was observed in both groups at 6 and 12 months after the interventions. The PENS group had improvements in current pain for all 3 postrehabilitation times compared with baseline measures. CONCLUSIONS An impairment-based intervention effectively improved subjective function, pain, strength, range of motion, and physical activity levels in individuals with PFP. Participants who received PENS in addition to the rehabilitation program had improved current pain at 6 and 12 months postrehabilitation compared with baseline scores. TRIAL REGISTRATION ClinicalTrials.gov identifier: NCT02441712.
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Affiliation(s)
- Neal R Glaviano
- College of Health and Human Services, School of Exercise and Rehabilitation Sciences, University of Toledo, OH
| | - Ashley N Marshall
- Department of Interdisciplinary Health Sciences, A.T. Still University, Mesa, AZ
| | - L Colby Mangum
- College of Health Professions and Sciences, University of Central Florida, Orlando
| | - Joseph M Hart
- Department of Orthopedic Surgery, University of Virginia, Charlottesville
| | - Jay Hertel
- Department of Orthopedic Surgery, University of Virginia, Charlottesville
| | - Shawn Russell
- Department of Orthopedic Surgery, University of Virginia, Charlottesville
| | - Susan A Saliba
- Department of Kinesiology, University of Virginia, Charlottesville
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Moore C, Donovan L, Murray AM, Armstrong C, Glaviano NR. External ankle taping does not alter lower extremity side-step cut and straight sprint biomechanics in young adult males. Sports Biomech 2018; 19:395-410. [PMID: 30036151 DOI: 10.1080/14763141.2018.1493743] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Lateral ankle sprains (LAS) are one of the most common musculoskeletal injuries and as a response, clinicians often use external ankle taping prophylactically to reduce the prevalence of injuries. External ankle taping techniques have been shown to significantly reduce passive ankle range of motion; however, there is limited research on the effects of external ankle taping on lower extremity kinematics or kinetics during sport specific tasks. Therefore, our objective was to compare the effects of external ankle taping on ankle, knee and hip kinematics and kinetics compared to no taping during an anticipated sidestep cutting task and a straight sprint task. We conducted a cross-over laboratory study with 16 healthy males. Three-dimensional kinematics and kinetics were collected with a motion capture system and in-ground force plate during 5 trials of a sprint and anticipated side-step cut with or without external ankle taping. Group means and associated 90% confidence intervals were plotted across 100 data points for each task, significance being identified when the confidence intervals did not overlap for three consecutive data points. No significant kinetic or kinematic differences were identified between conditions for the tasks. External ankle taping does not influence lower extremity biomechanics during a control cutting task.
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Affiliation(s)
- Chandler Moore
- School of Exercise and Rehabilitation Sciences, College of Health and Human Services, University of Toledo, Toledo, OH, USA
| | - Luke Donovan
- Department of Kinesiology, College of Health and Human Services, University of North Carolina at Charlotte, NC, USA
| | - Amanda M Murray
- School of Exercise and Rehabilitation Sciences, College of Health and Human Services, University of Toledo, Toledo, OH, USA
| | - Charles Armstrong
- School of Exercise and Rehabilitation Sciences, College of Health and Human Services, University of Toledo, Toledo, OH, USA
| | - Neal R Glaviano
- School of Exercise and Rehabilitation Sciences, College of Health and Human Services, University of Toledo, Toledo, OH, USA
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Affiliation(s)
- Ada Weiss
- Department of Sports MedicineWake Forest UniversityWinston‐Salem North Carolina USA
| | - Neal R. Glaviano
- School of Exercise and Rehabilitation ScienceUniversity of ToledoMailstop 119, Toledo Ohio43606 USA
| | - Jacob Resch
- Curry School of Education, Department of KinesiologyUniversity of VirginiaCharlottesville Virginia USA
| | - Susan Saliba
- Curry School of Education, Department of KinesiologyUniversity of VirginiaCharlottesville Virginia USA
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Glaviano NR, Baellow A, Saliba S. Physical activity levels in individuals with and without patellofemoral pain. Phys Ther Sport 2017; 27:12-16. [DOI: 10.1016/j.ptsp.2017.07.002] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2017] [Revised: 07/11/2017] [Accepted: 07/14/2017] [Indexed: 02/06/2023]
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Abstract
CONTEXT Neuromuscular electrical stimulation (NMES) is a common modality used to retrain muscles and improve muscular strength after injury or surgery, particularly for the quadriceps muscle. There are parameter adjustments that can be made to maximize the effectiveness of NMES. While NMES is often used in clinical practice, there are some limitations that clinicians should be aware of, including patient discomfort, muscle fatigue, and muscle damage. EVIDENCE ACQUISITION PubMed was searched through August 2014 and all articles cross-referenced. STUDY DESIGN Clinical review. LEVEL OF EVIDENCE Level 3. RESULTS Clinicians can optimize torque production and decrease discomfort by altering parameter selection (pulse duration, pulse frequency, duty cycle, and amplitude). Pulse duration of 400 to 600 μs and a pulse frequency of 30 to 50 Hz appear to be the most effective parameters to optimize torque output while minimizing discomfort, muscle fatigue, or muscle damage. Optimal electrode placement, conditioning programs, and stimulus pattern modulation during long-term NMES use may improve results. CONCLUSION Torque production can be enhanced while decreasing patient discomfort and minimizing fatigue.
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Affiliation(s)
- Neal R. Glaviano
- Department of Kinesiology, Exercise and Sport Injury Laboratory, University of Virginia, Charlottesville, Virginia
- Neal R. Glaviano, MEd, ATC, Exercise and Sport Injury Laboratory, University of Virginia, Memorial Gymnasium, PO Box 400407, Charlottesville, VA 22904 ()
| | - Susan Saliba
- Curry School of Education, Department of Kinesiology, University of Virginia, Charlottesville, Virginia
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Abstract
Patellofemoral pain is a common knee pathology that affects a wide range of active individuals. These individuals often seek medical care, with 25% of all patients seen in sports medicine clinics being treated for patellofemoral pain. While conservative treatment produce beneficial short-term results, individuals with patellofemoral pain often have long-term pain and decreased quality of life for many years following their diagnosis. One of the challenges for treating this chronic condition is the heterogeneous presentation of impairments across patients, ranging from soft tissue restriction, muscle weakness, altered movement patterns during functional tasks, and weak core stability. Clinicians need to identify these impairments and develop an individualized impairment-based model for treating patients with PFP. The aim of this review it to provide guidance and recommendations for clinicians who treat PFP in hopes to improve long-term outcomes for the conservative treatment of PFP.
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Affiliation(s)
- Neal R Glaviano
- a Department of Kinesiology , University of Virginia Ringgold standard institution , Charlottesville , VA , USA
| | - Susan Saliba
- a Department of Kinesiology , University of Virginia Ringgold standard institution , Charlottesville , VA , USA
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Glaviano NR, Saliba SA. Immediate Effect of Patterned Electrical Neuromuscular Stimulation on Pain and Muscle Activation in Individuals With Patellofemoral Pain. J Athl Train 2016; 51:118-28. [PMID: 26967547 DOI: 10.4085/1062-6050-51.4.06] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
CONTEXT For individuals with patellofemoral pain (PFP), altered muscle activity and pain are common during functional tasks. Clinicians often seek interventions to improve muscle activity and reduce impairments. One intervention that has not been examined in great detail is electrical stimulation. OBJECTIVE To determine whether a single patterned electrical neuromuscular stimulation (PENS) treatment would alter muscle activity and pain in individuals with PFP during 2 functional tasks, a single-legged squat and a lateral step down. DESIGN Cohort study. SETTING Sports medicine research laboratory. PATIENTS OF OTHER PARTICIPANTS: A total of 22 individuals with PFP (15 women, 7 men; age = 26.0 ± 7.9 years, height = 173.8 ± 8.1 cm, mass = 75.1 ± 17.9 kg). INTERVENTION(S) Participants were randomized into 2 intervention groups: a 15-minute PENS treatment that produced a strong motor response or a 15-minute 1-mA subsensory (sham) treatment. MAIN OUTCOME MEASURE(S) Before and immediately after the intervention, we assessed normalized electromyography amplitude, percentage of activation time across functional tasks, and onset of activation for the vastus medialis oblique, vastus lateralis, gluteus medius, adductor longus, biceps femoris, and medial gastrocnemius muscles during a single-legged squat and a lateral step down. Scores on the visual analog scale for pain were recorded before and after the intervention. RESULTS After a single treatment of PENS, the percentage of gluteus medius activation increased (0.024) during the lateral step down. Visual analog scores decreased during both the single-legged squat (PENS: preintervention = 2.7 ± 1.9, postintervention = 0.9 ± 0.7; sham: preintervention = 3.2 ± 1.6, postintervention = 2.8 ± 1.9; group × time interaction: P = .041) and lateral step down (PENS: preintervention = 3.4 ± 2.4, postintervention = 1.1 ± 0.8; sham: preintervention = 3.9 ± 1.7, postintervention = 3.3 ± 2.0; group × time interaction: P = .023). No changes in electromyography or pain measures were noted in the sham group. CONCLUSIONS The PFP participants who received PENS had immediate improvement in gluteus medius activation and a reduction in pain during functional tasks.
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Affiliation(s)
- Neal R Glaviano
- Department of Kinesiology, Exercise & Sport Injury Laboratory, University of Virginia, Charlottesville
| | - Susan A Saliba
- Department of Kinesiology, Exercise & Sport Injury Laboratory, University of Virginia, Charlottesville
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Glaviano NR, Huntsman S, Dembeck A, Hart JM, Saliba S. Improvements in kinematics, muscle activity and pain during functional tasks in females with patellofemoral pain following a single patterned electrical stimulation treatment. Clin Biomech (Bristol, Avon) 2016; 32:20-7. [PMID: 26775230 DOI: 10.1016/j.clinbiomech.2015.12.007] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/18/2015] [Revised: 12/20/2015] [Accepted: 12/21/2015] [Indexed: 02/07/2023]
Abstract
BACKGROUND Individuals with patellofemoral pain present with altered hip muscle activation, faulty movement patterns, and pain during functional tasks. Examining new treatment options to address these impairments may better treat those with patellofemoral pain. The purpose of this study was to determine if patterned electrical stimulation to the lower extremity affects muscle activity, movement patterns, and pain following a single treatment. METHODS Fifteen females with patellofemoral pain were randomized to receive a single 15-minute treatment of either a patterned electrical neuromuscular stimulation or a sham. Peak kinematics of the knee, hip, and trunk, electromyography and pain were examined pre and post-intervention during a single leg squat and lateral step-down task. Group means and pre/post reduced kinematic values were also plotted during the entire task with 90% confidence intervals to identify differences in movement strategies. FINDINGS No baseline differences were found in peak kinematics between groups. No pre to post-intervention differences in peak knee, hip and trunk kinematics were found, however differences were seen when the quality of movement across the entire tasks was assessed. The electrical stimulation group had improved knee flexion and hip abduction during the lateral step-down. A significant improvement in gluteus medius activation following patterned electrical neuromuscular stimulation occurred during the step-down (P=0.039). Significant pain improvements were also seen in both the single leg squat (P=0.025) and lateral step-down (P=0.006). INTERPRETATION A single treatment of patterned electrical neuromuscular stimulation improved muscle activation, lower extremity kinematics during functional tasks, and pain.
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Affiliation(s)
- Neal R Glaviano
- Department of Kinesiology, Exercise and Sport Injury Laboratory, University of Virginia, Charlottesville, VA, USA.
| | - Stephanie Huntsman
- Department of Kinesiology, Exercise and Sport Injury Laboratory, University of Virginia, Charlottesville, VA, USA
| | - Ashley Dembeck
- Department of Kinesiology, Exercise and Sport Injury Laboratory, University of Virginia, Charlottesville, VA, USA
| | - Joseph M Hart
- Department of Kinesiology, Exercise and Sport Injury Laboratory, University of Virginia, Charlottesville, VA, USA; Department of Orthopedic Surgery, University of Virginia, Charlottesville, VA, USA
| | - Susan Saliba
- Department of Kinesiology, Exercise and Sport Injury Laboratory, University of Virginia, Charlottesville, VA, USA
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Glaviano NR, Kew M, Hart JM, Saliba S. DEMOGRAPHIC AND EPIDEMIOLOGICAL TRENDS IN PATELLOFEMORAL PAIN. Int J Sports Phys Ther 2015; 10:281-290. [PMID: 26075143 PMCID: PMC4458915] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023] Open
Abstract
BACKGROUND Understanding the demographics of patellofemoral pain is important to determine the best practices in diagnosis and treatment of this difficult pathology. The occurrence of patellofemoral pain has been reported from isolated sports medicine clinics and from within the military, but its incidence has never been examined in the general population within the United States. PURPOSE The purpose of this study was to examine the reported occurrence of patellofemoral pain for those individuals seeking medical care and to compare that to all other pathologies that result in anterior knee pain, such as tendinopathies, patella subluxation, osteoarthritis, or meniscal and bursal conditions. Occurrence rates were examined across sex, age and region within a large healthcare provider database that contains over 30 million individuals. METHODS Data were queried with the PearlDiver Patient Record Database, a national database containing orthopedic patient records. Two common International Classification of Disease, Ninth Revision (ICD-9) codes for patellofemoral pain (717.7 - Patella Chondromalacia and 719.46 - Pain in joint, lower leg) were utilized and were searched from the years 2007-2011. The top twenty additional ICD-9 codes that were concurrently coded with 717.7 and 719.46 were removed from the data. Chi-squared and Mantel-Haenszel tests were utilized to identify statistically significant differences in the diagnosis of patellofemoral pain between sex, age, and year. RESULTS During this five-year period, there were 2,188,753 individuals diagnosed with patellofemoral pain. The diagnosis was more common in females compared to males with 1,211,665 and 977,088 cases respectfully (p<0.001). Statistically significant differences between ages was found, with 50-59 year olds having the most cases with 578,854, p<0.001. And, during the five-year examination period, there was a steady increase between 2007-2011, p<0.01. CONCLUSION Patellofemoral pain was diagnosed between 1.5% and 7.3% of all patients seeking medical care within the United States. Females experienced patellofemoral pain more often than males and there was a steady increase of cases in the United States during the 2007-2011 examination period. The diagnosis of patellofemoral pain increased with age and the 50-59 year old age group had the most cases. LEVEL OF EVIDENCE 2b.
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Affiliation(s)
- Neal R. Glaviano
- Department of Kinesiology, Exercise and Sport Injury Laboratory, University of Virginia, Charlottesville, VA, USA
| | - Michelle Kew
- School of Medicine, University of Virginia, Charlottesville, VA, USA
| | | | - Susan Saliba
- Department of Kinesiology, Exercise and Sport Injury Laboratory, University of Virginia, Charlottesville, VA, USA
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Glaviano NR, Langston WT, Hart JM, Saliba S. Influence of patterned electrical neuromuscular stimulation on quadriceps activation in individuals with knee joint injury. Int J Sports Phys Ther 2014; 9:915-923. [PMID: 25540707 PMCID: PMC4275196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023] Open
Abstract
BACKGROUND Neuromuscular Electrical Stimulation is a common intervention to address muscle weakness, however presents with many limitations such as fatigue, muscle damage, and patient discomfort that may influence its effectiveness. One novel form of electrical stimulation purported to improve neuromuscular re-education is Patterned Electrical Neuromuscular Stimulation (PENS), which is proposed to mimic muscle-firing patterns of healthy individuals. PENS provides patterned stimulating to the agonist muscle, antagonist muscle and then agonist muscle again in an effort to replicate firing patterns. PURPOSE The purpose of this study was to determine the effect of a single PENS treatment on knee extension torque and quadriceps activation in individuals with quadriceps inhibition. METHODS 18 subjects (10 males and 8 females: 24.2±3.4 years, 175.3±11.8cm, 81.8±12.4kg) with a history of knee injury/pain participated in this double-blinded randomized controlled laboratory trial. Participants demonstrated quadriceps inhibition with a central activation ratio of ≤90%. Maximal voluntary isometric contraction of the quadriceps and central activation ratio were measured before and after treatment. The treatment intervention was a 15-minute patterned electrical stimulation applied to the quadriceps and hamstring muscles with a strong motor contraction or a sham group, who received an identical set up as the PENS group, but received a 1mA subsensory stimulation. A 2×2 (group × time) ANCOVA was used to determine differences in maximal voluntary isometric contraction and central activation ratio between groups. The maximal voluntary isometric contraction was selected as a covariate due to baseline differences. RESULTS There were no differences in change scores between pre- and post-intervention for maximal voluntary isometric contraction: (PENS: 0.09±0.32Nm/kg and Sham 0.15±0.18Nm/kg, p=0.713), or central activation ratio:(PENS: -1.22±6.06 and Sham: 1.48±3.7, p=0.270). CONCLUSIONS A single Patterned Electrical Neuromuscular Stimulation treatment did not alter quadriceps central activation ratio or maximal voluntary isometric contraction. Unlike other types of muscle stimulation, PENS did not result in a reduction of quadriceps torque. LEVEL OF EVIDENCE Level III.
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Affiliation(s)
- Neal R. Glaviano
- Exercise and Sport Injury Laboratory, University of Virginia, Charlottesville, VA USA
| | - William T. Langston
- Exercise and Sport Injury Laboratory, University of Virginia, Charlottesville, VA USA
| | - Joseph M. Hart
- Exercise and Sport Injury Laboratory, University of Virginia, Charlottesville, VA USA
| | - Susan Saliba
- Exercise and Sport Injury Laboratory, University of Virginia, Charlottesville, VA USA
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Casa DJ, Becker SM, Ganio MS, Brown CM, Yeargin SW, Roti MW, Siegler J, Blowers JA, Glaviano NR, Huggins RA, Armstrong LE, Maresh CM. Validity of devices that assess body temperature during outdoor exercise in the heat. J Athl Train 2007; 42:333-342. [PMID: 18059987 PMCID: PMC1978469] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
CONTEXT Rectal temperature is recommended by the National Athletic Trainers' Association as the criterion standard for recognizing exertional heat stroke, but other body sites commonly are used to measure temperature. Few authors have assessed the validity of the thermometers that measure body temperature at these sites in athletic settings. OBJECTIVE To assess the validity of commonly used temperature devices at various body sites during outdoor exercise in the heat. DESIGN Observational field study. SETTING Outdoor athletic facilities. PATIENTS OR OTHER PARTICIPANTS Fifteen men and 10 women (age = 26.5 +/- 5.3 years, height = 174.3 +/- 11.1 cm, mass = 72.73 +/- 15.95 kg, body fat = 16.2 +/- 5.5%). INTERVENTION(S) We simultaneously tested inexpensive and expensive devices orally and in the axillary region, along with measures of aural, gastrointestinal, forehead, temporal, and rectal temperatures. Temporal temperature was measured according to the instruction manual and a modified method observed in medical tents at local road races. We also measured forehead temperatures directly on the athletic field (other measures occurred in a covered pavilion) where solar radiation was greater. Rectal temperature was the criterion standard used to assess the validity of all other devices. Subjects' temperatures were measured before exercise, every 60 minutes during 180 minutes of exercise, and every 20 minutes for 60 minutes of postexercise recovery. Temperature devices were considered invalid if the mean bias (average difference between rectal temperature and device temperature) was greater than +/-0.27 degrees C (+/-0.5 degrees F). MAIN OUTCOME MEASURE(S) Temperature from each device at each site and time point. RESULTS Mean bias for the following temperatures was greater than the allowed limit of +/-0.27 degrees C (+/-0.5 degrees F): temperature obtained via expensive oral device (-1.20 degrees C [-2.17 degrees F]), inexpensive oral device (-1.67 degrees C [-3.00 degrees F]), expensive axillary device (-2.58 degrees C [-4.65 degrees F]), inexpensive axillary device (-2.07 degrees C [-3.73 degrees F]), aural method (-1.00 degrees C [-1.80 degrees F]), temporal method according to instruction manual (-1.46 degrees C [-2.64 degrees F]), modified temporal method (-1.36 degrees C [-2.44 degrees F]), and forehead temperature on the athletic field (0.60 degrees C [1.08 degrees F]). Mean bias for gastrointestinal temperature (-0.19 degrees C [-0.34 degrees F]) and forehead temperature in the pavillion (-0.14 degrees C [-0.25 degrees F]) was less than the allowed limit of +/-0.27 degrees C (+/-0.5 degrees F). Forehead temperature depended on the setting in which it was measured and showed greater variation than other temperatures. CONCLUSIONS Compared with rectal temperature (the criterion standard), gastrointestinal temperature was the only measurement that accurately assessed core body temperature. Oral, axillary, aural, temporal, and field forehead temperatures were significantly different from rectal temperature and, therefore, are considered invalid for assessing hyperthermia in individuals exercising outdoors in the heat.
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Affiliation(s)
- Douglas J Casa
- Human Performance Laboratory, Department of Kinesiology, Neag Schoolof Education, University of Connecticut, 2095 Hillside Road, U-1110, Storrs, CT 06269-1110, USA.
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McDermott BP, Casa DJ, Yeargin SW, Ganio MS, Myers SL, Glaviano NR, Huggins RA, Decher NR, Stover EA. Hydration Indices, Sweat Variables, and an Educational Intervention of Youth Football Campers. Med Sci Sports Exerc 2007. [DOI: 10.1249/01.mss.0000272937.97326.57] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Casa DJ, McDermott BP, Yeargin SW, Ganio MS, Myers SL, Glaviano NR, Huggins RA, Decher NR, Stover EA. Youth Hydration Knowledge, Habits, and Self-Reported Environmental Symptoms During Summer Football Camp. Med Sci Sports Exerc 2007. [DOI: 10.1249/01.mss.0000273084.96815.15] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Yeargin SW, Casa DJ, Ganio MS, McDermott BP, Levreault ML, Decher NR, Casa TM, Blowers JA, Glaviano NR. Hydration Knowledge and Habits of Youth Soccer Players and the Influence of an Educational Intervention. Med Sci Sports Exerc 2006. [DOI: 10.1249/00005768-200605001-01387] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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