Abstract:
CONTEXT:Quadriceps and hamstrings weakness occurs frequently after anterior cruciate ligament (ACL) injury and reconstruction. Evidence suggests that knee injury may precipitate hip and ankle muscle weakness, but few data support this contention after ACL injury and reconstruction. OBJECTIVE:To determine if hip, knee, and ankle muscle weakness present after ACL injury and after rehabilitation for ACL reconstruction. DESIGN:Case-control study. SETTING:University research laboratory. PATIENTS OR OTHER PARTICIPANTS:Fifteen individuals with ACL injury (8 males, 7 females; age = 20.27 ± 5.38 years, height = 1.75 ± 0.10 m, mass = 74.39 ± 13.26 kg) and 15 control individuals (7 men, 8 women; age = 24.73 ± 3.37 years, height = 1.75 ± 0.09 m, mass = 73.25 ± 13.48 kg). INTERVENTION(S):Bilateral concentric strength was assessed at 60°/s on an isokinetic dynamometer. The participants with ACL injury were tested preoperatively and 6 months postoperatively. Control participants were tested on 1 occasion. MAIN OUTCOME MEASURES:Hip-flexor, -extensor, -abductor, and -adductor; knee-extensor and -flexor; and ankle-plantar-flexor and -dorsiflexor strength (Nm/kg). RESULTS:The ACL-injured participants demonstrated greater hip-extensor (percentage difference = 19.7, F1,14 = 7.28, P = .02) and -adductor (percentage difference = 16.3, F1,14 = 6.15, P = .03) weakness preoperatively than postoperatively, regardless of limb, and greater postoperative hip-adductor strength (percentage difference = 29.0, F1,28 = 10.66, P = .003) than control participants. Knee-extensor and -flexor strength were lower in the injured than in the uninjured limb preoperatively and postoperatively (extensor percentage difference = 34.6 preoperatively and 32.6 postoperatively, t14 range = -4.59 to -4.23, P ≤ .001; flexor percentage difference = 30.6 preoperatively and 10.6 postoperatively, t14 range = -6.05 to -3.24, P < .05) with greater knee-flexor (percentage difference = 25.3, t14 = -4.65, P < .001) weakness preoperatively in the injured limb of ACL-injured participants. The ACL-injured participants had less injured limb knee-extensor (percentage difference = 32.0, t28 = -2.84, P = .008) and -flexor (percentage difference = 24.0, t28 = -2.44, P = .02) strength preoperatively but not postoperatively (extensor: t28 = -1.79, P = .08; flexor: t28 = 0.57, P = .58) than control participants. Ankle-plantar-flexor weakness was greater preoperatively than postoperatively in the ACL-injured limb (percentage difference = 31.9, t14 = -3.20, P = .006). CONCLUSIONS:The ACL-injured participants presented with hip-extensor, -adductor, and ankle-plantar-flexor weakness that appeared to be countered during postoperative rehabilitation. Our results confirmed previous findings suggesting greater knee-extensor and -flexor weakness postoperatively in the injured limb than the uninjured limb. The knee extensors and flexors are important dynamic stabilizers; weakness in these muscles could impair knee joint stability. Improving rehabilitation strategies to better target this lingering weakness seems imperative.
journal_name
J Athl Trainjournal_title
Journal of athletic trainingauthors
Thomas AC,Villwock M,Wojtys EM,Palmieri-Smith RMdoi
10.4085/1062-6050-48.3.23subject
Has Abstractpub_date
2013-09-01 00:00:00pages
610-20issue
5eissn
1062-6050issn
1938-162Xjournal_volume
48pub_type
杂志文章abstract::OBJECTIVE: To identify the types of injuries the human brain incurs as a result of traumatic forces applied to the cranium. In athletic events and endeavors, the full spectrum of intracranial hemorrhages in various compartments, raised intracranial pressure, and diffuse nonhemorrhagic damage may be seen. In this revie...
journal_title:Journal of athletic training
pub_type: 杂志文章
doi:
更新日期:2001-09-01 00:00:00
abstract:CONTEXT:Single-limb squats on a decline angle have been suggested as a rehabilitative intervention to target the knee extensors. Investigators, however, have presented very little empirical research in which they have documented the biomechanics of these exercises or have determined the optimum angle of decline used. ...
journal_title:Journal of athletic training
pub_type: 杂志文章
doi:10.4085/1062-6050-43.5.477
更新日期:2008-09-01 00:00:00
abstract:OBJECTIVE:Researchers have produced a hypothesis of transient heat intolerance (HI) after exertional heat stroke (EHS). Based on this hypothesis, heat-tolerance testing (HTT) has been postponed until weeks 6 to 8 after EHS and other types of exertional heat illness (EHI). We compared the HTT results of participants aft...
journal_title:Journal of athletic training
pub_type: 杂志文章
doi:10.4085/1062-6050-478-18
更新日期:2020-03-01 00:00:00
abstract:CONTEXT:Skinfold calipers (SC) typically are used to determine subcutaneous fat thicknesses. Identifying the exact separation of muscle and fat can complicate measurements. Ultrasound imaging (USI) might provide a better technique for analyzing subcutaneous fat thicknesses. OBJECTIVE:To compare measurements from SC an...
journal_title:Journal of athletic training
pub_type: 杂志文章
doi:10.4085/1062-6050-46.1.50
更新日期:2011-01-01 00:00:00
abstract:CONTEXT:Runners with high medial longitudinal arch structure demonstrate unique kinematics and kinetics that may lead to running injuries. The mobility of the midfoot as measured by the change in arch height is also suspected to play a role in lower extremity function during running. The effect of arch mobility in high...
journal_title:Journal of athletic training
pub_type: 临床试验,杂志文章
doi:10.4085/1062-6050-49.3.05
更新日期:2014-05-01 00:00:00
abstract:CONTEXT:Empirical evidence supports the idea that previous severe injuries in former collegiate athletes may adversely affect their ability to participate in daily activities later in life, which may then decrease their health-related quality of life (HRQOL). OBJECTIVE:To assess the influences of previous severe injur...
journal_title:Journal of athletic training
pub_type: 杂志文章
doi:10.4085/1062-6050-377-17
更新日期:2019-01-01 00:00:00
abstract:CONTEXT:Computerized neuropsychological testing is commonly used in the assessment and management of sport-related concussion. Even though computerized testing is widespread, psychometric evidence for test-retest reliability is somewhat limited. Additional evidence for test-retest reliability is needed to optimize clin...
journal_title:Journal of athletic training
pub_type: 杂志文章
doi:10.4085/1062-6050-48.3.09
更新日期:2013-07-01 00:00:00
abstract:CONTEXT:Hiring athletic trainers (ATs) in high schools may lower medical payments by third-party payers such as Medicaid or commercial insurers by reducing injury risks or may increase medical payments due to more referrals to other health care providers. To date, evidence is lacking on the actual financial effect of h...
journal_title:Journal of athletic training
pub_type: 杂志文章
doi:10.4085/1062-6050-390-17
更新日期:2019-02-01 00:00:00
abstract::OBJECTIVE: To present an unusual congenital malformation of the central nervous system. BACKGROUND: Neural tube defects (NTDs) are potentially serious congenital malformations. When undiagnosed in childhood, such lesions may later be mistaken for a variety of other soft tissue abnormalities. Athletic trainers should b...
journal_title:Journal of athletic training
pub_type: 杂志文章
doi:
更新日期:2001-06-01 00:00:00
abstract:CONTEXT: Athletic trainers (ATs) play a vital role in managing the care of student-athletes after a sport-related concussion, yet little is known about their specific involvement in the implementation of academic adjustments as part of the concussion-management plan. OBJECTIVE: To explore ATs' perceived roles and re...
journal_title:Journal of athletic training
pub_type: 杂志文章
doi:10.4085/1062-6050-52.7.02
更新日期:2017-10-01 00:00:00
abstract:CONTEXT:Increased rates of sport participation and sport-related injury have led to greater emphasis on and attention to medical care of student-athletes in the secondary school setting. Access to athletic training services is seen as a critical factor for delivering adequate injury prevention and medical care to stude...
journal_title:Journal of athletic training
pub_type: 杂志文章
doi:10.4085/1062-6050-48.4.04
更新日期:2013-07-01 00:00:00
abstract:OBJECTIVE:To offer an alternative perspective on current continuing education practices and to propose a model for facilitating continuing education in the athletic training workplace. BACKGROUND:Professional knowledge can quickly become outdated, and the personal/professional contexts of allied medical fields such as...
journal_title:Journal of athletic training
pub_type: 杂志文章
doi:
更新日期:1998-01-01 00:00:00
abstract:CONTEXT:Anecdotal and qualitative evidence has suggested that some clinicians face pressure from coaches and other personnel in the athletic environment to prematurely return athletes to participation after a concussion. This type of pressure potentially can result in compromised patient care. OBJECTIVE:To quantify th...
journal_title:Journal of athletic training
pub_type: 杂志文章
doi:10.4085/1062-6050-50.6.03
更新日期:2015-09-01 00:00:00
abstract:CONTEXT:Researchers investigating collision and contact sport participation during high school have found mixed results. Understanding the association between current contact and collision sport participation and quality-of-life outcomes can enhance our knowledge about the risks and benefits of sport participation. OB...
journal_title:Journal of athletic training
pub_type: 杂志文章
doi:10.4085/1062-6050-0536.19
更新日期:2020-11-01 00:00:00
abstract::Various continental sporting events have exposed team sports referees to different environmental conditions. Several studies have focused on strategies to prevent athlete performance impairment induced by heat or warm (or both) conditions, but few authors have investigated the effect of heat on referees' performance. ...
journal_title:Journal of athletic training
pub_type: 杂志文章
doi:10.4085/1062-6050-51.3.04
更新日期:2016-03-01 00:00:00
abstract:CONTEXT:In 2010, 8.6 million children were treated for unintentional injuries in American emergency departments. Child engagement in sports and recreation offers many health benefits but also exposure to injury risks. In this analysis, we consider possible developmental risk factors in a review of age, sex, and inciden...
journal_title:Journal of athletic training
pub_type: 杂志文章
doi:10.4085/1062-6050-49.3.41
更新日期:2014-11-01 00:00:00
abstract::Tape has traditionally been used to support the ankle during activity. More recently, commercial ankle braces have been worn as an alternative. The cumulative information on the effects of taped versus braced ankle support or interbrace comparisons is inconclusive. With few exceptions, ankle brace studies have collect...
journal_title:Journal of athletic training
pub_type: 杂志文章
doi:
更新日期:1995-09-01 00:00:00
abstract:CONTEXT: Restricted dorsiflexion (DF) at the ankle joint can cause acute and chronic injuries at the ankle and knee. Myofascial release and instrument-assisted soft tissue mobilization (IASTM) techniques have been used to increase range of motion (ROM); however, evidence directly comparing their effectiveness is limit...
journal_title:Journal of athletic training
pub_type: 杂志文章,随机对照试验
doi:10.4085/1062-6050-386-16
更新日期:2018-02-01 00:00:00
abstract::OBJECTIVE: To investigate the retraction time, forces, and torques applied to the football helmet during removal of the face mask with different face-mask removal tools. DESIGN AND SETTING: Subjects retracted the face mask of a football helmet mounted to a force platform in a laboratory setting. They removed a standar...
journal_title:Journal of athletic training
pub_type: 杂志文章
doi:
更新日期:2002-09-01 00:00:00
abstract:CONTEXT:Scapular rehabilitation exercises should focus on selective activation of weaker muscles and minimal activation of hyperactive muscles. For rehabilitation of overhead athletes, single-plane open chain exercises below 90° of shoulder elevation are often recommended. Moreover, incorporating the kinetic chain in s...
journal_title:Journal of athletic training
pub_type: 杂志文章
doi:10.4085/1062-6050-136-19
更新日期:2020-04-01 00:00:00
abstract:CONTEXT:Little is known about pitching performance or lack of it among Major League Baseball (MLB) pitchers who undergo operative treatment of rotator cuff tears. OBJECTIVE:To assess pitching performance outcomes in MLB players who needed operative treatment of rotator cuff tears and to compare performance in these at...
journal_title:Journal of athletic training
pub_type: 杂志文章
doi:10.4085/1062-6050-46.3.296
更新日期:2011-05-01 00:00:00
abstract:OBJECTIVE:To present the case of a stress fracture of the eighth rib in a female collegiate rower. BACKGROUND:A female collegiate rower experienced severe pain in her chest, increasing with movement, deep breathing, and erect posture. No acute mechanism of injury was apparent. The team physician diagnosed a rib stress...
journal_title:Journal of athletic training
pub_type: 杂志文章
doi:
更新日期:2000-10-01 00:00:00
abstract:CONTEXT:Female athletic trainers (ATs) are currently underrepresented in the collegiate setting. Parenting and family obligations may play a role in this underrepresentation. OBJECTIVE:To examine female ATs' perspectives on parenting and working in the secondary school and collegiate employment settings. DESIGN:Cross...
journal_title:Journal of athletic training
pub_type: 杂志文章
doi:10.4085/1062-6050-45.5.459
更新日期:2010-09-01 00:00:00
abstract:CONTEXT:There are limited data concerning differences in concussion education exposure and how education exposures relates to care-seeking and symptom disclosure, specifically in Division I student-athletes. OBJECTIVE:Investigate demographic characteristics associated with concussion education exposure and examine whe...
journal_title:Journal of athletic training
pub_type: 杂志文章
doi:10.4085/211-20
更新日期:2020-11-05 00:00:00
abstract:OBJECTIVE: To describe the concept of statistical power as related to comparative interventions and how various factors, including sample size, affect statistical power. BACKGROUND: Having a sufficiently sized sample for a study is necessary for an investigation to demonstrate that an effective treatment is statisti...
journal_title:Journal of athletic training
pub_type: 杂志文章
doi:10.4085/1062-6050-284-17
更新日期:2018-07-01 00:00:00
abstract:OBJECTIVE:To provide treatment guidelines for rehabilitation after ligamentous and labral surgery of the shoulder. DATA SOURCES:We searched Index Medicus for the last 10 years using the key words "shoulder instability," "shoulder exercises," and "shoulder surgery." DATA SYNTHESIS:Detailed rehabilitation programs for ...
journal_title:Journal of athletic training
pub_type: 杂志文章
doi:
更新日期:2000-07-01 00:00:00
abstract::OBJECTIVE: To compare the effectiveness of Nature's Chemist as an ultrasound coupling agent with the effectiveness of another topical analgesic (Biofreeze), Aquasonic 100, and a sham treatment in producing intramuscular (IM) temperature increase during a typical therapeutic ultrasound treatment. DESIGN AND SETTING: Su...
journal_title:Journal of athletic training
pub_type: 杂志文章
doi:
更新日期:2001-03-01 00:00:00
abstract:CONTEXT:Active muscle stiffness might protect the unstable shoulder from recurrent dislocation. OBJECTIVE:To compare strength and active stiffness in participants with unilateral anterior shoulder instability and to examine the relationship between active stiffness and functional ability. DESIGN:Cross-sectional study...
journal_title:Journal of athletic training
pub_type: 杂志文章
doi:10.4085/1062-6050-46.6.642
更新日期:2011-11-01 00:00:00
abstract::OBJECTIVE: To examine the influences of clinician technique on performance and interpretation of the Lachman test. DESIGN AND SETTING: Blinded, controlled, and randomized-block design clinical study conducted in an athletic training laboratory classroom. SUBJECTS: Twenty-two certified athletic trainer clinicians and 1...
journal_title:Journal of athletic training
pub_type: 杂志文章
doi:
更新日期:2003-03-01 00:00:00
abstract:CONTEXT:Fatigue could contribute to ankle-sprain injuries during sport, particularly for individuals with chronic ankle instability (CAI). OBJECTIVE:To examine whether adults with or without CAI develop fatigue at similar rates when performing ankle exercises at the same relative effort level and whether these groups ...
journal_title:Journal of athletic training
pub_type: 杂志文章
doi:10.4085/1062-6050-51.9.02
更新日期:2016-06-02 00:00:00