Abstract：
OBJECTIVE:To determine the electromyographic (EMG) activity of the vastus medialis oblique (VMO), vastus lateralis (VL), semitendinosus and semimembranosus (ST), and biceps femoris (BF) muscles during 4 elastic-tubing closed kinetic chain exercises in postoperative patients with anterior cruciate ligament (ACL)-reconstructed knees. DESIGN AND SETTING:A 4 x 4 repeated-measures analysis of variance design guided this study. Independent variables were type of exercise and muscle; the dependent variable was EMG activity. SUBJECTS:Fifteen patients, 5 to 24 weeks after ACL reconstruction. MEASUREMENTS:Subjects performed 4 exercises (front pull, back pull, crossover, reverse crossover) with elastic tubing attached to the foot of the uninjured leg. Time-and amplitude- normalized EMG activity was recorded from the VMO, VL, ST, and BF muscles of the injured leg. The hamstrings: quadriceps ratio was calculated. RESULTS:The normalized VMO, VL, and BF EMG activity ranged from 25% to 50% of maximum voluntary isometric contraction for the 4 exercises. The ST ranged from 12% on the back pull to 58% on the front pull. The hamstrings: quadriceps ratios were 137% (front pull), 115% (crossover), 70% (back pull), and 60% (reverse crossover). CONCLUSIONS:We suggest that clinicians use these exercises during early ACL rehabilitation since they incorporate early weightbearing with hamstring and quadriceps coactivation.
journal_name
J Athl Trainjournal_title
Journal of athletic trainingauthors
Schulthies SS,Ricard MD,Alexander KJ,Myrer JWkeywords:
subject
Has Abstractpub_date
1998-10-01 00:00:00pages
328-35issue
4eissn
1062-6050issn
1938-162Xjournal_volume
33pub_type
杂志文章abstract：CONTEXT:Isokinetic and isotonic resistance training exercises are commonly used to increase strength during musculoskeletal rehabilitation programs. Our study was designed to examine the efficacy of isokinetic and isotonic muscle actions using surface electromyographic (EMG) amplitude-to-work ratios (EMG/WK) and to ext...
journal_title：Journal of athletic training
pub_type： 杂志文章
doi：
更新日期：2006-07-01 00:00:00
abstract：CONTEXT: Because of the increasing popularity of participation in Irish dance, the incidence of lower limb injuries is high among this competitive population. OBJECTIVE: To investigate the effects of fatigue on the peak lower limb and trunk angles as well as the peak lower limb joint forces and moments of competitiv...
journal_title：Journal of athletic training
pub_type： 杂志文章
doi：10.4085/1062-6050-52.3.12
更新日期：2017-07-01 00:00:00
abstract：:In this article, I present an overview of the actions and effects of aspirin and nonsteroidal anti-inflammatory drugs (NSAIDs). Although athletic trainers cannot prescribe or dispense prescription medications, they should be as aware of their effects as they are of other methods of injury treatment. To set the discuss...
journal_title：Journal of athletic training
pub_type： 杂志文章
doi：
更新日期：1993-10-01 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:Previous epidemiologic researchers have examined time-loss (TL) injuries in high school student-athletes, but little is known about the frequency of non-time-loss (NTL) injuries in these athletes. OBJECTIVE:To describe the methods of the National Athletic Treatment, Injury and Outcomes Network (NATION) Surveil...
journal_title：Journal of athletic training
pub_type： 杂志文章
doi：10.4085/1062-6050-50.5.04
更新日期：2015-08-01 00:00:00
abstract：CONTEXT:The increased emphasis on implementing evidence-based practice has reinforced the need to more accurately assess patient improvement. Psychometrically sound, patient-reported outcome measures are essential for evaluating patient care. A patient-reported outcome instrument that may be useful for clinicians is th...
journal_title：Journal of athletic training
pub_type： 杂志文章
doi：10.4085/1062-6050-0302.19
更新日期：2020-11-01 00:00:00
abstract：CONTEXT:Baseball is played around the world, including in North America and Latin America. The repetitive and stressful act of throwing can lead to adaptations such as increased humeral retroversion (HR) in the throwing arm. This adaptation is often considered beneficial as it allows more glenohumeral external rotation...
journal_title：Journal of athletic training
pub_type： 杂志文章
doi：10.4085/1062-6050-563-18
更新日期：2020-01-01 00:00:00
abstract：CONTEXT:Supervisor support has been identified as key to the fulfillment of work-life balance for the athletic trainer (AT), yet limited literature exists on the perspectives of supervisors. OBJECTIVE:To investigate how the head AT facilitates work-life balance among staff members within the National Collegiate Athlet...
journal_title：Journal of athletic training
pub_type： 杂志文章
doi：10.4085/1062-6050-49.3.88
更新日期：2015-01-01 00:00:00
abstract：OBJECTIVE:To present the case of a 22-year-old football player who sustained an acute posterior-wall acetabular fracture. BACKGROUND:Acetabular fractures can be a difficult injury for the athletic trainer to assess. Aside from the obvious immediate ramifications, proper assessment and care are necessary to decrease th...
journal_title：Journal of athletic training
pub_type： 杂志文章
doi：
更新日期：2000-01-01 00:00:00
abstract：CONTEXT:Foam-rolling exercises are frequently included in warmups due to their benefits for increasing range of motion (ROM). However, their effects on proprioception and vertical jump have not been analyzed and therefore remain unclear. Moreover, the effects of performing practical-duration foam-rolling exercises afte...
journal_title：Journal of athletic training
pub_type： 杂志文章,随机对照试验
doi：10.4085/1062-6050-474-18
更新日期：2019-11-01 00:00:00
abstract：CONTEXT:A narrow base of gait (BOG), the mediolateral distance between the foot and the body's line of gravity at midstance, during running is a suggested cause of injuries such as iliotibial band syndrome and tibial stress injury. However, an understanding of modifiable and nonmodifiable factors that influence BOG is ...
journal_title：Journal of athletic training
pub_type： 杂志文章
doi：10.4085/1062-6050-565-19
更新日期：2020-12-01 00:00:00
abstract：OBJECTIVE:The purpose of this study was to assess the effect of low-volt, microamperage stimulation (LVMAS) on perceived pain and muscle strength following an intense bout of eccentric exercise. DESIGN AND SETTING:An experimental pretest-posttest control group design was used for the study. The experiment was conducte...
journal_title：Journal of athletic training
pub_type： 杂志文章
doi：
更新日期：1997-04-01 00:00:00
abstract：CONTEXT:Heel lifts are often prescribed as part of the treatment program for patients with overuse injuries associated with limited ankle dorsiflexion. However, little is known about how joint kinematics and temporal variables are affected by heel lifts. OBJECTIVE:To determine the effects of heel lifts on selected low...
journal_title：Journal of athletic training
pub_type： 杂志文章
doi：
更新日期：2006-04-01 00:00:00
abstract：CONTEXT:The valgus stress test is used clinically to assess injury to the medial knee structures in 2 positions: full extension and some degree of flexion. The amount of flexion used to "isolate" the medial collateral ligament is not consistent in the literature, but most studies have shown that stiffness of the ligame...
journal_title：Journal of athletic training
pub_type： 杂志文章
doi：10.4085/1062-6050-43.2.157
更新日期：2008-04-01 00:00:00
abstract：CONTEXT:Functional ankle instability (FAI) is a debilitating condition that has been reported to occur after 20% to 50% of all ankle sprains. Landing from a jump is one common mechanism of ankle injury, yet few researchers have explored the role of visual cues and anticipatory muscle contractions, which may influence a...
journal_title：Journal of athletic training
pub_type： 杂志文章
doi：10.4085/1062-6050-48.5.05
更新日期：2013-11-01 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 describe a treatment strategy for paradoxical vocal-cord dysfunction (PVCD) as it applies to an athletic population. BACKGROUND: Paradoxical vocal-cord dysfunction has been identified as a cause of dyspnea and stridor in athletes. The basic element of PVCD is an inappropriate closure of the vocal cords d...
journal_title：Journal of athletic training
pub_type： 杂志文章
doi：
更新日期：2002-09-01 00:00:00
abstract：OBJECTIVE:To examine the effects of fatigue on proprioception and neuromuscular control of the shoulder. DESIGN AND SETTING:Subjects were randomly assigned to either an experimental group or control group. Subjects were tested using either the active angle-reproduction or the single- arm dynamic stability test. The su...
journal_title：Journal of athletic training
pub_type： 杂志文章
doi：
更新日期：1999-10-01 00:00:00
abstract：:Wearable sensors are capable of capturing foot-strike positioning, which lends insight into landing biomechanics during running. The purpose of our study was to assess the relationship between foot-strike categorization and foot-strike angle during running to validate the sensor-derived foot-strike outcome. Twenty col...
journal_title：Journal of athletic training
pub_type： 杂志文章
doi：10.4085/1062-6050-0520.19
更新日期：2020-12-01 00:00:00
abstract：OBJECTIVE:To introduce the process of journal writing to promote reflection and discuss the techniques and strategies to implement journal writing in an athletic training education curriculum. BACKGROUND:Journal writing can facilitate reflection and allow students to express feelings regarding their educational experi...
journal_title：Journal of athletic training
pub_type： 杂志文章
doi：
更新日期：2006-04-01 00:00:00
abstract：OBJECTIVE:To inform health care professionals about the various mechanisms of this little-known injury, as well as its potentially limb-threatening complications. In addition, keys to immediate recognition and the importance of a thorough rehabilitation program are stressed. DATA SOURCES:I searched MEDLINE (1966-2000)...
journal_title：Journal of athletic training
pub_type： 杂志文章
doi：
更新日期：2004-10-01 00:00:00
abstract：CONTEXT:Proprioceptive training on compliant surfaces is used to rehabilitate and prevent ankle sprains. The ability to improve proprioceptive function via such training has been questioned. Achilles tendon vibration is used in motor-control research as a form of proprioceptive stimulus. Using measures of postural stea...
journal_title：Journal of athletic training
pub_type： 杂志文章
doi：10.4085/1062-6050-52.1.06
更新日期：2017-02-01 00:00:00
abstract：:While the high school setting holds the best promise of employment for the recently certified athletic trainer, most student athletic trainers do not spend time working with the secondary school athlete. The athletic trainer must be aware of the stages of adolescent psychological maturity and be sensitive to the athle...
journal_title：Journal of athletic training
pub_type： 杂志文章
doi：
更新日期：1993-04-01 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：:OBJECTIVE: Our purpose was to examine undergraduate athletic training students' perceptions of how time is utilized during clinical field experiences while enrolled in Commission on Accreditation of Allied Health Education Program (CAAHEP)-accredited athletic training programs and to determine the effects of clinical ...
journal_title：Journal of athletic training
pub_type： 杂志文章
doi：
更新日期：2004-06-01 00:00:00
abstract：CONTEXT:Greater musculotendinous stiffness may enhance spinal stretch reflex sensitivity by improving mechanical coupling of the muscle spindle and the stretch stimulus. This heightened sensitivity would correspond with a shorter latency and higher-amplitude reflex response, potentially enhancing joint stability. OBJE...
journal_title：Journal of athletic training
pub_type： 杂志文章
doi：10.4085/1062-6050-43.1.29
更新日期：2008-01-01 00:00:00
abstract：:States regulate professions to protect the public from harm by unqualified practitioners. Without regulation of athletic trainers (ATs), there is no legal way to assure quality health care to athletes because there is no legal definition as to what an AT can and cannot do. Problems exist, however; 1) ATs nationwide ma...
journal_title：Journal of athletic training
pub_type： 杂志文章
doi：
更新日期：1996-04-01 00:00:00
abstract：OBJECTIVE:To review 16 years of National Collegiate Athletic Association (NCAA) injury surveillance data for men's wrestling and identify potential areas for injury prevention initiatives. BACKGROUND:From 1988-1989 through 2003-2004, 17% of NCAA schools sponsoring varsity men's wrestling programs participated in annua...
journal_title：Journal of athletic training
pub_type： 杂志文章
doi：
更新日期：2007-04-01 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：:In this study, I investigated and analyzed the various joint motions in the shoulders of college baseball players. Twenty-six players (age=20.38+/-1.36 yr) from two colleges were examined for upper extremity range of motion (ROM), including shoulder flexion, extension, internal rotation at 90 degrees abduction, and ex...
journal_title：Journal of athletic training
pub_type： 杂志文章
doi：
更新日期：1992-01-01 00:00:00
