John P. Albright

Hamstring control and the unstable anterior cruciate ligament-deficient knee.

treatment. Presently, the accepted prognosis for the knee with an ACL rupture has been summarized by Allman’ as &dquo;the beginning of the end for the knee&dquo; in terms of progressive deterioration, subsequent reinjuries, ever-increasing instability, meniscal tears, and posttraumatic arthritis. However, little documentation13.15 of the long-term sequellae of this injury exists. The ACL &dquo;pop&dquo; has been an indication to repair and/or reconstruct the cruciate ligament. It has been the authors’ observation that, while stability and function are best achieved surgically, many athletes without ACLs appear to have little or no functional limitations. While many studies have considered the effects of

Midfoot Sprains in Collegiate Football Players

We studied midfoot sprains in collegiate football players to define and document incidence, mechanisms, injury patterns, and disabilities. Twenty-three athletes with 24 injuries from 1987 through 1991, with a mean followup of 30.8 months, were identified for the study. The inju ries occurred in 4% of the football players per year with offensive linemen incurring 29.2% of the injuries. The location of maximal tenderness on physical examina tion was an important prognostic indicator such that in juries with medial and global midfoot tenderness to pal pation had the longest time loss from participation and time until full healing. Lateral midfoot sprains required short periods of disability, and players were able to re turn to participation with the use of an orthosis. Nineteen athletes with 20 injuries responded to a questionnaire. Four players reported residual functional problems. Only 1 of these players had to modify his recreational activities because of pain. The other players remained very active with only mild complaints of pain after high- demand activities. Midfoot sprains were associated with acute disability that required prolonged restriction from competition, but for most players the long-term residual problems were minor.

Prevalence of and Risk Factors Associated With Symptoms of Depression in Competitive Collegiate Student Athletes

Objective:To describe the prevalence of symptoms of depression among competitive collegiate student athletes and examine the factors associated with symptoms of depression among this population. Design:A baseline survey of a prospective cohort study. Setting:The survey was administered at the preseason team meetings. Participants:The sample included 257 collegiate student athletes (167 males and 90 females) who participated in Division I National Collegiate Athletic Association (NCAA)-sponsored sports during the 2005-2006 academic year. Main Outcome Measurements:Symptoms of depression were measured by the Center for Epidemiological Studies Depression Scale (CESD). Anxiety was measured by the State-Trait Anxiety Inventory (STAI). The Generalized Estimating Equations (GEE) was used to assess the factors associated with symptoms of depression. Results:Twenty-one percent of participants reported experiencing symptoms of depression. Athletes who were female, freshmen, or with self-reported pain were associated with significantly increased odds of experiencing symptoms of depression after adjusting for sports and other covariates. In particular, female athletes had 1.32 greater odds (95% CI, 1.01 to 1.73) of experiencing symptoms of depression compared to male student athletes. Freshmen had 3.27 greater odds (95% CI, 1.63 to 6.59) of experiencing symptoms of depression than their more senior counterparts. Student athletes who reported symptoms of depression were associated with higher scores of State-Anxiety and Trait-Anxiety, respectively (P < 0.0001). Conclusions:Our findings provide empirical data for the future study on mental health among collegiate athletes. Further studies on why female and freshmen athletes are at increased risk of experiencing symptoms of depression are also warranted.

Head and neck injuries in college football: An eight-year analysis:

The present study documented head and neck injuries in a study group of 342 college football players at a single institution for a period of 8 years. All freshmen players were screened for evidence of: (1) past history of head and neck injuries, and (2) abnormalities of the cervical spine on physical examination and x-ray film. By recording all head injuries and those neck injuries with time loss, incidence rates and patterns of injury incurred in college competition were determined. A total of 175 head and neck injuries were sustained by 100 players over the 8 year period. Those players with abnormal findings on screening examination were twice as likely to have a head or neck injury at some point in their college careers as those players with a normal screening examination. The greater the degree of ab normality on freshman screening examination, the more severe the neck injury in college was likely to be. Twenty-nine percent of all players in the study group sustained a head or neck injury during their college careers. The probability of a subsequent head or neck injury escalated sharply following a single incident. The overall incidence of injury was found to have been dramatically reduced over the 8 years. Influential factors such as legislative rule changes, medical status of recruits, and general coaching philosophies are dis cussed with regard to injury reduction and prevention of head and neck injuries in college football.

The Effect of Lifelong Exercise on Canine Articular Cartilage

The effect of long-term exercise on canine knees was studied to determine whether an increased level of lifelong weightbearing exercise causes degeneration, or changes that may lead to degeneration, of articular cartilage. Eleven dogs were exercised on a treadmill at 3 km/hr for 75 minutes 5 days a week for 527 weeks while carrying jackets weighing 130% of their body weight. Ten control dogs were allowed unrestricted activity in cages for the 550 weeks. At the completion of the study all knee joints were inspected for evidence of joint injury and degeneration. Articular cartilage sur faces from the medial tibial plateau were examined by light microscopy, the cartilage thickness was meas ured, and the intrinsic material properties were deter mined by mechanical testing. No joints had ligament or meniscal injuries, cartilage erosions, or osteophytes. Light microscopy did not demonstrate cartilage fibrilla tion or differences in safranin O staining of the tibial articular cartilages between the two groups. Further more, the tibial articular cartilage thickness and me chanical properties did not differ between the two groups. These results show that a lifetime of regular weightbearing exercise in dogs with normal joints did not cause alterations in the structure and mechanical properties of articular cartilage that might lead to joint degeneration.

Effect of Graft Choice on the Outcome of Revision Anterior Cruciate Ligament Reconstruction in the Multicenter ACL Revision Study (MARS) Cohort

Background: Most surgeons believe that graft choice for anterior cruciate ligament (ACL) reconstruction is an important factor related to outcome; however, graft choice for revision may be limited due to previously used grafts. Hypotheses: Autograft use would result in increased sports function, increased activity level, and decreased osteoarthritis symptoms (as measured by validated patient-reported outcome instruments). Autograft use would result in decreased graft failure and reoperation rate 2 years after revision ACL reconstruction. Study Design: Cohort study; Level of evidence, 2. Methods: Patients undergoing revision ACL reconstruction were identified and prospectively enrolled by 83 surgeons at 52 sites. Data collected included baseline demographics, surgical technique, pathologic abnormalities, and the results of a series of validated, patient-reported outcome instruments (International Knee Documentation Committee [IKDC], Knee injury and Osteoarthritis Outcome Score [KOOS], Western Ontario and McMaster Universities Osteoarthritis Index [WOMAC], and Marx activity rating score). Patients were followed up at 2 years and asked to complete the identical set of outcome instruments. Incidences of additional surgery and reoperation due to graft failure were also recorded. Multivariate regression models were used to determine the predictors (risk factors) of IKDC, KOOS, WOMAC, Marx scores, graft rerupture, and reoperation rate at 2 years after revision surgery. Results: A total of 1205 patients (697 [58%] males) were enrolled. The median age was 26 years. In 88% of patients, this was their first revision, and 341 patients (28%) were undergoing revision by the surgeon who had performed the previous reconstruction. The median time since last ACL reconstruction was 3.4 years. Revision using an autograft was performed in 583 patients (48%), allograft was used in 590 (49%), and both types were used in 32 (3%). Questionnaire follow-up was obtained for 989 subjects (82%), while telephone follow-up was obtained for 1112 (92%). The IKDC, KOOS, and WOMAC scores (with the exception of the WOMAC stiffness subscale) all significantly improved at 2-year follow-up (P < .001). In contrast, the 2-year Marx activity score demonstrated a significant decrease from the initial score at enrollment (P < .001). Graft choice proved to be a significant predictor of 2-year IKDC scores (P = .017). Specifically, the use of an autograft for revision reconstruction predicted improved score on the IKDC (P = .045; odds ratio [OR] = 1.31; 95% CI, 1.01-1.70). The use of an autograft predicted an improved score on the KOOS sports and recreation subscale (P = .037; OR = 1.33; 95% CI, 1.02-1.73). Use of an autograft also predicted improved scores on the KOOS quality of life subscale (P = .031; OR = 1.33; 95% CI, 1.03-1.73). For the KOOS symptoms and KOOS activities of daily living subscales, graft choice did not predict outcome score. Graft choice was a significant predictor of 2-year Marx activity level scores (P = .012). Graft rerupture was reported in 37 of 1112 patients (3.3%) by their 2-year follow-up: 24 allografts, 12 autografts, and 1 allograft and autograft. Use of an autograft for revision resulted in patients being 2.78 times less likely to sustain a subsequent graft rupture compared with allograft (P = .047; 95% CI, 1.01-7.69). Conclusion: Improved sports function and patient-reported outcome measures are obtained when an autograft is used. Additionally, use of an autograft shows a decreased risk in graft rerupture at 2-year follow-up. No differences were noted in rerupture or patient-reported outcomes between soft tissue and bone–patellar tendon–bone grafts. Surgeon education regarding the findings of this study has the potential to improve the results of revision ACL reconstruction.

Injuries in women's gymnastics The state of the art

This article takes a three-stage approach to the topic of injuries in womens gymnastics. In the first stage, we review the literature and summarize our current knowledge of injury rates, injuries in specific events, and anatomical location of injuries. In the second, we critically evaluate the relative contributions of these studies in terms of their generalizability, methods, and conceptual approaches. Finally, we present possible directions for future research in the area of womens gymnastic injuries.

Patellofemoral joint motion: Evaluation by ultrafast computed tomography

Patellofemoral maltracking is a recognized cause of peripatellar pain. Measurements of the patellofemoral relationships during active motion are not available, and clinicians currently rely on observation, palpation, and static radiographic images to evaluate the symptomatic patient. Ultrafast computed tomography (ultrafast CT) offers objective observations of the dynamic influences of muscle contraction on the patellofemoral joint as the knee is actively moved through a range of motion from 90° flexion to full extension. This study reports our initial observations and establishes a range of normal values so that patients with a clinical suspicion of patellar maltracking may be evaluted.

The use of knee braces, part 1: Prophylactic knee braces in contact sports.

Surrogate knee model biomechanical studies have indicated that off-the-shelf braces provide 20% to 30% greater resistance to a lateral blow when the knee is in full extension. Custom functional braces doubled the protective effects and proved effective with the knee in some flexion. Although functional performance studies are not consistent, preventive knee braces may slow straight-ahead sprint speed, cause early fatigue, and increase muscular relaxation pressures, energy expenditure, blood lactate levels, maximal torque output, oxygen consumption, and heart rate. Two epidemiologic studies have been performed. At West Point, a randomized control study of 71 injuries in 1396 cadets indicated knee brace effectiveness with a statistically higher rate of injury in the control group (3.4/1000 exposures) than in the braced group (1.5/1000 exposures), with the most significance for medial collateral ligament sprains in defensive players. The Big Ten Conference conducted a descriptive study of 100 medial collateral ligament sprains among 987 players in different positions, strings, and types of session. Brace-wear tendency varied directly with the unbraced player counterparts risk of medial collateral ligament sprain, with the nonplayer linemen experiencing both the greatest risk of unbraced practice session injury (0.0801 injuries/1000 exposures) and the highest incidence of brace wear (85%). During practices, there was a nonsignificant but very consistent reduction in injury rate for braced players in every position and string. During games, there was also a reduced rate for linemen and the linebacker/tight end group. The study concluded that although the issue is not closed, preventive knee braces appear to offer some protection to the medial collateral ligament from a contact injury involving a valgus blow, but there may be negative effects on performance level, leg cramping, and fatigue symptoms.

Medial Collateral Ligament Knee Sprains in College Football: Effectiveness of Preventive Braces

This is the second of 2 articles on a 3-year investigation of medial collateral ligament sprains of the knee to as sess the effectiveness of prophylactic knee braces in NCAA Division I college football players. Position, string, type of session, and daily brace wear were re corded. The injury rates for braced and unbraced knees were used to create an incidence density ratio. The data were stratified and simultaneously controlled for posi tion, string, and session and evaluated for their statis tical significance. The 987 Big Ten players generated 155,772 knee exposures over the study period (50% braced). Noticeable differences existed in the rates of injury for the braced and unbraced knees in almost ev ery position during practices, depending on player or nonplayer status. When the influential factors of posi tion, string, and session are considered, there is a con sistent but not statistically significant tendency for the players wearing preventive knee braces to experience a lower injury rate than for their unbraced counterparts. For starters and substitutes in the line positions, as well as the linebackers and tight ends, there was a consis tent trend toward a lower injury rate in both practices and games. The braced players in the skill positions (backs/kickers), at least during games, exhibited a higher injury rate.