Match injuries in Sri Lankan junior cricket: A prospective,longitudinal study

ObjectivesUnderstanding the nature of injuries in cricket is key to mitigate injury risks and prioritise preventive measures. This study aimed to identify the incidence and nature of match injuries among Sri Lankan junior cricketers.DesignLongitudinal follow-up study with prospective in-season data collection.MethodsA national survey of schoolboy, division-1 cricket teams in under-15 and under-17 age groups. Using a paper-based questionnaire, distributed to school-teams at the start of the 2016 cricket season, respondents recorded any injuries, including the site, type and mechanism. Match injury incidence rates (match-IIR) (injuries/100 match-player-days) were calculated overall, by position and for match time loss (MTL) and non-MTL injuries.ResultsFrom 59 school-teams, 573 players responded, with 404 players reporting 744 injuries in 648 matches. The match-IIR was 28.0 injuries/100 match-player-days (95% CI = 26.0–30.2). The highest match-IIR was reported among fielders (46.0% of all injuries sustained; match-IIR = 12.9) compared with batters (25.4%; match-IIR = 7.1) and bowlers (20.3%; match-IIR = 5.7). Abrasions and bruises to the knee or elbow were the most common injuries among fielders, with the majority being non-MTL injuries.ConclusionsAlmost half (46.0%) of all injuries were to fielders, and more research into their severity and mechanisms is needed to identify the need for, and design of, preventive measures. Batters sustained a relatively large number of facial-organ injuries from being struck by the ball, presenting a need to evaluate the use and appropriateness of helmets by Sri Lankan junior cricketers. Similar to other junior cricket studies, the most common injuries among bowlers were strains and sprains, mainly affecting the lower limbs and lower back.     

Negative association between injuries and team success in professional cricket: A 9-year prospective cohort analysis

ObjectivesTo examine the relationship between injuries and team success in professional cricket.DesignProspective cohort analysis.MethodsA prospective cohort of all match time-loss injuries and County Championship point tallies for nine seasons (from 2010 to 2018 inclusive) for all 18 First-Class County Cricket (FCCC) cricket teams in England and Wales. Two injury measures of match time-loss injury incidence and burden were assessed for within-team (linear mixed model on season-to-season changes) and between-team (correlation on differences averaged over all seasons) effects. County Championship league points tally was used as the measure of team success.ResultsA moderate negative correlation was found between injury burden and team performance (r = ?0.36; 90% CI ?0.66 to 0.05; likely negative, P = 0.15). A reduction in match injury incidence of 2 match time-loss injuries per 1000 days of play (90% CI 1.4–2.9, P = 0.10) within a team, or a reduction in match injury burden of 75 days per 1000 days of play (90% CI 50–109, P = 0.053) in any given season was associated with the smallest worthwhile change in County Championship points (+13 points) for Division 1, but not for Division 2.ConclusionModerate reductions in injury burden are associated with potentially worthwhile effects on performance for a domestic cricket team in the County Championship Division 1.     

Back injuries to fast bowlers in cricket: a prospective study.

Eighty-two high performance young male fast bowlers (mean age 16.8 years) were tested immediately prior to the season for selected kinanthropometric and physiological data. Subjects were also filmed both laterally (200 Hz) and from above (100 Hz) while bowling so that their front foot impacted a force platform during the delivery stride. The players then completed a log book over the ensuing season that detailed their training and playing programmes. All cricket related injuries over this season were assessed by a sports physician who used computerized tomography to assist in the diagnosis of spinal injuries. At the completion of this season the players were grouped according to their injury status (Group 1--bony injury to a vertebra; Group 2--soft tissue injury to the back that caused the player to miss at least one game, and Group 3--no injuries). A one-way analysis of variance was used to identify if any variables were significantly (P less than 0.05) different between the three groups, and a Scheffe post hoc comparison was used to determine which groups were significantly different. Eleven per cent of the players sustained a stress fracture to a vertebra(e) (L4 to S1), while 27 per cent sustained a soft tissue injury to the back. Bowlers with a low longitudinal foot arch were more likely to develop a stress fracture than those with a high arch. Shoulder depression and horizontal flexion strength for the preferred limb and quadriceps power in the non-preferred limb were also significantly related to back injuries. Results suggest that bowlers with the above physical characteristics, who bowl with these biomechanical techniques for extended periods, are predisposed to back injuries.     

A one season prospective cohort study of volleyball injuries

Objective: To estimate the overall incidence of acute and overuse volleyball injuries, and to describe factors associated with ankle sprains.

Methods: 486 players from the second and third Dutch national volleyball divisions participated in the study and were followed prospectively during a whole season. Three measurements were made during the season (baseline, follow up 1, and follow up 2), where all players completed a questionnaire on demographic variables (only at baseline), sports participation, use of preventive measures, and previous injuries. Volleyball exposure during training and matches was recorded for each individual player by the coach on a weekly exposure form. In case of injury the coach provided the injured player with an injury registration form, which had to be completed within one week after the onset of injury.

Results: 100 injuries were reported, resulting in an overall injury incidence of 2.6 injuries/1000 hours. The incidence of acute injuries was 2.0/1000 hours. Ankle sprains (n = 41) accounted for most of the acute injuries, and 31 (75%) of all players with an ankle sprain reported a previous ankle sprain. Twenty five overuse injuries were reported. The overall incidence of overuse injuries was 0.6/1000 hours; the back and the shoulder were the most common sites.

Conclusions: Ankle sprain is the most common injury in volleyball, accounting for 41% of all volleyball related injuries. Previous injury seems to be an important risk factor for an ankle sprain. Injury prevention programmes should focus on ankle sprains and concentrate on players with previous ankle sprains.

     

Differences in kinetic asymmetry between injured and noninjured novice runners: A prospective cohort study

PurposeThe purpose of this prospective study was to describe natural levels of asymmetry in running, compare levels of asymmetry between injured and noninjured novice runners and compare kinetic variables between the injured and noninjured lower limb within the novice runners with an injury.MethodsAt baseline vertical ground reaction forces and symmetry angles (SA) were assessed with an instrumented treadmill equipped with three force measuring transducers. Female participants ran at 8 and 9 km h^?1 and male runners ran at 9 and 10 km h^?1. Participants were novice female and male recreational runners and were followed during a 9-week running program.ResultsTwo hundred and ten novice runners enrolled this study, 133 (63.3%) female and 77 (36.7%) male runners. Thirty-four runners reported an RRI. At baseline SA values varied widely for all spatio-temporal and kinetic variables. The inter-individual differences in SA were also high. No significant differences in SA were found between female and male runners running at 9 km h^?1. In injured runners the SA of the impact peak was significantly lower compared to noninjured runners.ConclusionsNatural levels of asymmetry in running were high. The SA of impact peak in injured runners was lower compared to noninjured runners and no differences were seen between the injured and noninjured lower limbs.     

Differences in kinetic variables between injured and noninjured novice runners: A prospective cohort study

ObjectivesThis prospective study examined differences in kinetic variables between injured and noninjured novice female and male runners and their potential contribution to RRIs.DesignA prospective cohort study.MethodsAt baseline vertical ground reaction forces were assessed with an instrumented treadmill equipped with three force measuring transducers. Female participants ran at 8 and 9 km h^?1 and male runners ran at 9 and 10 km h^?1. Primary outcome measure was a running related injury (RRI). Participants were novice female and male recreational runners and were followed during a 9-week running program with three running sessions a week.ResultsOne hundred thirty three female and seventy seven male runners participated in this study. Mean age was 37.2 years and the BMI was 23.9 kg m^?2. During the nine week running program 16.2% of the participants sustained an injury and no difference in incidence between female and male runners was seen. In injured male runners loading rate was significantly higher compared to noninjured male runners at both running speeds and contact time in the injured male group was significantly shorter at 9 km h^?1. In the group of female injured and noninjured runners no differences on kinetic or spatio-temporal variables were observed. Female runners had significantly higher loading rates compared to male runners but this did not have an effect on the incidence of RRIs.ConclusionsThis study showed that male injured runners had higher loading rates and shorter contact times than noninjured male runners. In female runners, however, no differences in kinetic or spatio-temporal variables were observed between injured and noninjured novice runners.     

A one‐season prospective study of injuries and illness in elite junior tennis

The objective of this study was to estimate the incidence and prevalence of injury and illness among elite junior tennis players. A cohort of 73 players (11–14 years) in the 2012–2013 Dutch national high‐performance program was followed for 32 weeks; all participants completed the study. The OSTRC Questionnaire on Health Problems was used to record self‐reported injuries and illnesses and to record training and match exposure. Main outcome measures were average prevalence of overuse injury and illness and incidence density of acute injury. On average, players practiced 9.1 h/week (SD 0.6; range 2.3–12.0) and had 2.2 h of match play (SD 0.6; range 2.3–12.0). During the course of the study, 67 players reported a total of 187 health problems. The average weekly prevalence of all health problems was 21.3% (95% CI: 19.2–22.9), of which 12.1% (95% CI: 10.9–13.3) constituted overuse injuries and 5.8% (95% CI: 4.6–6.9) illnesses. The incidence of acute injuries was 1.2/1000 h of tennis play (95% CI: 0.7–1.7). The high occurrence of overuse injuries among elite junior tennis players suggests that an early focus on preventative measures is warranted, with a particular focus on the monitoring and management of workload.     

Prognosis and prognostic factors of running-related injuries in novice runners: A prospective cohort study

Objectives

To investigate the prognosis and possible prognostic factors of running-related injuries (RRIs) in novice runners.

Incidence and risk factors of injuries in Brazilian elite handball players: A prospective cohort study

The aim of this study was to investigate the incidence and risk factors for handball injuries in Brazilian elite handball players. Overall, 339 athletes from 21 handball teams who participated in the two main Brazilian championships were followed up during a season. In total, 312 injuries were reported by 201 athletes. The injury incidence rate during training was 3.7/1000 h, and during matches was 20.3/1000 matches. Ankle (19.4%, n = 46) and knee (13.5%, n = 32) were the body regions most affected by traumatic injuries. Shoulders (44.0%, n = 33) and knee (26.7%, n = 20) were the body regions most affected by overuse injuries. Muscle injuries (27.1%, n = 68) was the traumatic injury type most reported. Tendinopathy (91.8%, n = 56) was the overuse injury type most observed. Previous injury (OR: 2.42, CI 95%: 1.51–3.89) and an additional match per week (OR: 1.31, CI 95%: 1.05–1.62) were associated with a higher risk of overuse injury. Female athletes (OR: 1.56, CI 95%: 1.08–2.25) and an additional hour of training per week (OR: 1.09, CI 95%: 1.02–1.15) were associated with a higher risk of traumatic injury. This study showed that athletes with previous injury have shown a high risk of developing an overuse injury.     

Musculoskeletal injuries in the Norwegian National Ballet: a prospective cohort study

The purpose of the present study was to determine the incidence of musculoskeletal injuries among professional ballet dancers in the Norwegian National Ballet. A 19 weeks prospective study with registration and clinical assessment of dancers with injuries was conducted. Medical staff working for the National Ballet registered incidence of injuries. In addition the dancers filled out a questionnaire about previous injuries, their work situation, and factors they believed increased the risk of injuries. Of the 41 dancers (80% response rate), 31 dancers experienced one injury or more. The majority of injuries involved foot and ankle. Twenty-two per cent of the injuries were acute injuries. Seventy-five per cent of the injuries were soft tissue injuries. Most injuries were of mild to moderate severity. Sixteen per cent of the injuries resulted in absence from work. Factors, the dancers believed were associated with risk of injuries were related to training, organizational factors and environmental factors. Seventy-eight per cent of the dancers experienced "negative" stress at work. Sixty-four per cent experienced that they had little influence on their work conditions. This study showed, however, no significant association between these psychological factors and musculoskeletal injuries. It is concluded that there is a high incidence of musculoskeletal injuries in the Norwegian National Ballet.     

Spinal injuries in professional rugby union: a prospective cohort study.

OBJECTIVES: To determine the incidence, severity, nature, and causes of cervical, thoracic, and lumbar spine injuries sustained during competition and training in professional rugby union. DESIGN: A 2 season prospective cohort design. SETTING: Twelve English Premiership rugby union clubs. PARTICIPANTS: Five hundred and forty-six male rugby union players of whom 296 were involved in both seasons. MAIN OUTCOME MEASURES: Location, diagnosis, severity (number of days unavailable for training and matches), and cause of injury: incidence of match and training injuries (injuries/1000 player-hours). RISK FACTORS: Player age, body mass, stature, playing position, use of headgear, and activity and period of season. RESULTS: The incidences of spinal injuries were 10.90 (9.43 to 12.60) per 1000 player match-hours and 0.37 (0.29 to 0.47) per 1000 player training-hours. No player sustained a catastrophic spinal injury, but 3 players sustained career-ending injuries. Overall, players were more likely to sustain a cervical injury during matches and a lumbar injury during training. Forwards were significantly more likely to sustain a spinal injury than backs during both matches (P < 0.01) and training (P = 0.02). During matches, injuries to the cervical (average: 13 days; P < 0.01) and lumbar (13 days; P < 0.01) spine were more severe than injuries to the thoracic (5 days) spine; during training, injuries to the lumbar spine (26 days) were more severe than injuries to the cervical (13 days; P = 0.10) or thoracic (12 days; P = 0.06) spine. A total of 4037 days were lost to competition and training through spinal injuries with lumbar disc injuries sustained during training accounting for 926 days (23%) and cervical nerve root injuries sustained during matches for 621 days (15%). During matches, more injuries were caused by tackles (37%), and during training more injuries were caused by weight-training (33%). CONCLUSIONS: The results showed that rugby union players were exposed to a high risk of noncatastrophic spinal injury during tackling, scrummaging, and weight-training activities; injury prevention strategies, therefore, should be focused on these activities.     

The association of padded headgear with concussion and injury risk in junior Australian football: A prospective cohort study

ObjectivesTo assess whether padded headgear was associated with incidence of suspected sports-related concussion, non-sports-related concussion head injury, and injuries to other body regions in junior Australian football.DesignProspective cohort injury surveillance.MethodsThere were 400 junior players (42.5% female) enrolled across two seasons. Suspected sports-related concussion was defined by detection of observable signs on the field and medical assessment or missed match(es) due to suspected sports-related concussion. Non-sports-related concussion head injury and injuries to other body regions were defined as those that received medical assessment or resulted in a missed match.ResultsThere were 20 teams monitored over 258 matches. 204 players (2484 player hours) wore mandated headgear throughout the season and 196 (2246 player hours) did not. The incidence rate of suspected sports-related concussion was 3.17 (95% confidence interval: 3.04–3.30) per 1000 player-hours and no differences were observed between males and females (risk ratio 1.11; 95% confidence interval: 0.40–3.06). Headgear use was not associated with suspected sports-related concussion (risk ratio 1.09; 95% confidence interval: 0.41–2.97), non-sports-related concussion head injury (risk ratio 0.27; 95% confidence interval: 0.06–1.31), or injuries to other body regions (risk ratio 1.41; 95% confidence interval: 0.79–2.53).ConclusionsHeadgear use was not associated with reduced risk of suspected sports-related concussion, non-sports-related concussion head injury or injuries to other body regions. There was no difference in the rate of suspected sports-related concussion in female compared to male players, however, rates of non-sports-related concussion head injury and injuries to other body regions were higher in male players.     

Epidemiology of injuries during the Wheelchair Basketball World Championships 2018: A prospective cohort study

Several international sports federations have implemented a standardized injury reporting system during their championships. However, very few studies have investigated athletes with disabilities during major championships apart from the Paralympic Games. Therefore, the aim of this study was to assess the rate and characteristics of injuries during the Wheelchair Basketball World Championships 2018 (WBWC). This prospective cohort study was conducted during the WBWC held in Hamburg, Germany, from August 16 to August 26, 2018. Physicians or physiotherapists of all 28 participating teams (total 336 players) were asked to report all newly incurred injuries (with location, diagnosis, cause, and estimated duration of absence) daily on a standardized injury report form. Prevalence and incidence rates were calculated. Medical staff of 11 teams (132 players) reported 100 injuries, equivalent to 75.8 per 100 players (95% CI: 60.9-90.7) or 68.9 per 1000 player-days (55.4-82.4). Eight time-loss injuries were reported (6.1 injuries per 100 players [95% CI: 1.9-10.3] or 5.5 injuries per 1000 player-days [1.7-9.3]). More injuries were incurred during matches (n = 68) than during training. Most injuries affected the neck/cervical spine (16%), thoracic spine/upper back (15%), and shoulder (14%). The most frequent diagnosis was muscle spasms (25%), the most frequent cause was overuse (52%). A high rate of non–time-loss injuries compared to Paralympic Games was reported. Future studies should focus on the etiology of muscle spasms and further identify injury mechanisms of traumatic and overuse injuries in wheelchair basketball players to develop adequate preventive measures.     

A prospective cohort study of anterior cruciate ligament injuries in elite Norwegian team handball

The purpose of this study was to examine gender differences in the incidence of anterior cruciate ligament (ACL) injuries in a population of highlevel team handball players. We also wanted to examine injury mechanisms and possible risk factors for ACL injuries, including menstrual status. The study was done prospectively during the 1993-94, 1994-95, and 1995–96 seasons. We found 28 ACL injuries, 23 among women (incidence: 0.31 ± 0.06 injuries per 1000 player hours) and 5 among men (0.06 ± 0.03 inj./1000 h; P < 0.001 vs women; risk ratio: 5.0). Of the 28 injuries, 24 occurred during competiton (0.91 ± 0.19 inj./1000 h; women: 1.60 ± 0.35 inj./1000 h; men: 0.23 ± 0.13 inj./1000 h; P ±0.001 vs. women; risk ratio: 7.0) and 4 during training (0.03 ± 0.02 inj./1000 h; P ±0.001 vs. competition; risk ratio: 29.9). Nearly all the injuries ( n = 25) occurred in noncontact situations when the players performed high-speed plant-and-cut movements which they were well accustomed to. A reliable menstrual history could be obtained in 17 of the 23 cases among females. Five of the injuries occurred in the menstrual phase, 2 in the follicular phase, 1 in the early luteal phase and 9 in the late luteal phase (chi-square_{3 d.f.}= 13.2; P ±0.01). The results suggest that there may be an increased risk of ACL injury during the week prior to or after the start of the menstrual period.     

Performance and anthropometric characteristics of prospective elite junior Australian footballers: A case study in one junior team

The aim of the study was to compare anthropometric and physical performance data of players who were selected for a Victorian elite junior U18 Australian rules football squad. Prior to the selection of the final training squad, 54 players were assessed using a battery of standard anthropometric and physical performance tests. Multivariate analysis (MANOVA) showed significant (p<0.05) differences between selected and non-selected players when height, mass, 20-m sprint, agility and vertical jump height were considered collectively. Univariate analysis revealed that the vertical jump was the only significant (p<0.05) individual test and a near significant trend (p=0.07) for height differentiating between selected and non-selected players with medium effect sizes for all other tests except endurance. In this elite junior football squad, physical characteristics can be observed that discriminate between players selected and non-selected, and demonstrates the value of physical fitness testing within the talent identification process of junior (16-18 years) players for squad and/or team selection. Based on MANOVA results, the findings from this study suggest team selection appeared to be related to a generally higher performance across the range of tests. Further, age was not a confounding variable as players selected tended to be younger than those non-selected. These findings reflect the general consensus that, in state-based junior competition, there is evidence of promoting overall player development, selecting those who are generally able to fulfil a range of positions and selecting players on their potential.     

Incidence,burden, and pattern of injuries in Spanish male youth soccer players: A prospective cohort study

ObjectivesTo explore the incidence, burden, and pattern of injuries in Spanish male youth soccer players during a 9-month competitive season (from September to May–June).DesignProspective cohort study.Participants314 young (10–19 years) soccer players.Main outcome measuresIncidence, burden, location, type, severity, mechanism, and circumstance of injuries, as well as potential differences by tactical position, month of the year, age group, and maturity status.ResultsA total of 146 time-loss injuries were sustained by 101 different players. This resulted in an overall injury incidence of 3.1 injuries per 1000 h, a training injury incidence of 1.8 injuries per 1000 h, and a match injury incidence of 11.2 injuries per 1000 h. The probability of injury over the season was 34%. Most of the injuries affected the lower extremity and were classified as muscle/tendon injuries, with hamstring muscle injuries representing the most burdensome diagnosis. The incidence of injuries increased with age and maturation, but a heightened risk of overuse injuries during periods around peak height velocity was also identified.ConclusionsThese findings suggest a need for implementing specific injury prevention measures. Due to the high burden shown, these measures should mainly focus on reducing the number and severity of hamstring muscle injuries.