Tron Krosshaug

Tron Krosshaug
Norwegian School of Sport Sciences (NIH) · Department of Sports Medicine

Professor

About

121
Publications
64,576
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
7,086
Citations
Additional affiliations
July 2000 - present
Norwegian School of Sport Sciences (NIH)
Position
  • Professor (Associate)

Publications

Publications (121)
Article
Lateral ankle sprains are a commonly incurred injury in sports. They have a high recurrence rate and can lead to the development of persistent injury associated symptoms. We performed a quantitative synthesis of published case reports documenting the kinematics of acute lateral ankle sprains and episodes of 'giving-way' of the ankle joint to provid...
Article
Mausehund, L and Krosshaug, T. Understanding bench press biomechanics-Training expertise and sex affect lifting technique and net joint moments. J Strength Cond Res XX(X): 000-000, 2021-The purpose of this study was to compare normalized net joint moments (NJMs), moment arms, and muscle activity in the bench press exercise between powerlifters and...
Conference Paper
A high number of non-contact anterior cruciate ligament (ACL) injuries occur during cutting maneuvers [1]. The peak knee abduction moment (KAM) within the early phase of stance is a strong predictor of ACL injuries. Still, measuring knee joint loading in-field is challenging. However, to understand ACL loading, quantify the effectiveness of prevent...
Conference Paper
The majority of anterior cruciate ligament (ACL) injuries in team sports are non-contact injuries, with cutting maneuvers identified as high-risk tasks [1]. Young female handball players have been shown to be at greater risk for ACL injuries than males [2]. One risk factor for ACL injuries is the magnitude of the knee abduction moment (KAM) [3]...
Poster
Cutting maneuvers have been identified as high-risk tasks for anterior cruciate ligament injuries [1], especially for female handball players relative to males [2]. One risk factor is the magnitude of the knee abduction moment (KAM) [3]. Since the design of laboratory studies that mimic in-game scenarios to screen athletes is challenging, and techn...
Conference Paper
Background Studies investigating biomechanical risk factors for knee injuries in sport specific tasks are needed. Objective To investigate association between change of direction (COD) biomechanics and knee injury risk among youth team sports. Design Prospective cohort study. Setting Youth basketball and floorball. Participants 258 female and m...
Article
Full-text available
Abstract: The main objectives of the present study were to describe the injury incidence and to analyze the anthropometric and physical characteristics of players from three high-level women's football teams. The present study involved 54 female football players (21.9 ± 4.9 years old) from three different teams competing in the Spanish Reto Iberdro...
Article
Strength training exercises are essential for rehabilitation, improving our health as well as in sports. For optimal and safe training, educators and trainers in the industry should comprehend exercise form or technique. Currently, there is a lack of tools measuring in-depth skills of strength training experts. In this study, we investigate how dat...
Article
Classification algorithms determine the similarity of an observation to defined classes, e.g., injured or healthy athletes, and can highlight treatment targets or assess progress of a treatment. The primary aim was to cross-validate a previously developed classification algorithm using a different sample, while a secondary aim was to examine its ab...
Article
Full-text available
Background: Studies investigating biomechanical risk factors for knee injuries in sport-specific tasks are needed. Purpose: To investigate the association between change of direction (COD) biomechanics in a 180-degree pivot turn and knee injury risk among youth team sport players. Study design: Cohort study; Level of evidence, 2. Methods: A...
Article
Objective: To determine whether visually assessed performances of the single-leg squat (SLS) and vertical drop jump (VDJ) were associated with future noncontact anterior cruciate ligament (ACL) injury. Design: Prognostic accuracy cohort study. Methods: Elite female handball and football (soccer) athletes (n = 880) were tested from 2007 to 2014...
Article
Full-text available
The aim of this study was to investigate if frontal plane knee and hip control in single-leg squats or vertical drop jumps with an overhead target were associated with future non-contact anterior cruciate ligament (ACL) injury in elite female athletes. Of the 429 handball and 451 football athletes (age 21.5 ± 4.0 years, height 169.6 ± 6.4 cm, body...
Article
Mausehund, L, Werkhausen, A, Bartsch, J, and Krosshaug, T. Understanding bench press biomechanics-The necessity of measuring lateral barbell forces. J Strength Cond Res XX(X): 000-000, 2020-The purpose of this study was to advance the expertise of the bench press exercise by complementing electromyographic (EMG) with net joint moment (NJM) and stre...
Article
Full-text available
Few prospective studies have investigated hip and pelvic control as a risk factor for lower extremity (LE) injuries. The purpose of this study was to investigate whether deficits in hip and lumbopelvic control during standing knee lift test are associated with increased risk of acute knee and LE injuries in youth team sports. At baseline, 258 baske...
Article
Objective: Most research has focused on the bilateral drop jumps even though lower extremity injuries often occur in a single leg landing. We aimed to investigate the association between lower extremity alignment during unilateral and bilateral drop jump tests, and the risk of acute non-contact knee or ankle injuries in young team sport athletes....
Article
Full-text available
Background The vertical drop jump (VDJ) test is widely used for clinical assessment of ACL injury risk, but it is not clear whether such assessments are valid. Aim To examine if sports medicine professionals and coaches are able to identify players at risk of sustaining an ACL injury by visually assessing player performance during a VDJ test. Met...
Article
Full-text available
Rugby union players can be involved in many tackles per game. However, little is known of the regular head loading environment associated with tackling in rugby union. In particular, the magnitude and influencing factors for head kinematics during the tackle are poorly understood. Accordingly, the goal of this study was to measure head motion of a...
Article
Mausehund, L, Skard, AE, and Krosshaug, T. Muscle activation in unilateral barbell exercises: Implications for strength training and rehabilitation. J Strength Cond Res XX(X): 000-000, 2018-The purpose of the present investigation was to assess lower-body muscle activity and hamstrings-to-quadriceps (HQ) activation ratios during performance of the...
Article
Full-text available
Risberg, MA, Steffen, K, Nilstad, A, Myklebust, G, Kristianslund, E, Moltubakk, MM, and Krosshaug, T. Normative quadriceps and hamstring muscle strength values for female, healthy, elite handball and football players. J Strength Cond Res 32(8): 2314-2323, 2018-This study presents normative values for isokinetic knee extension and flexion muscle str...
Article
The purpose of this research was to investigate how lower extremity work was distributed during the pull of cleans performed lifting the barbell to the minimum height required to receive it in a full squat (minimal height clean); or with maximum effort to elevate the barbell as high as possible and receiving it in either a full (maximal effort clea...
Article
Full-text available
Background/aim Poor frontal plane knee control can manifest as increased dynamic knee valgus during athletic tasks. The purpose of this study was to investigate the association between frontal plane knee control and the risk of acute lower extremity injuries. In addition, we wanted to study if the single-leg squat (SLS) test can be used as a screen...
Article
Full-text available
Background Stiff landings with less knee flexion and high vertical ground-reaction forces have been shown to be associated with an increased risk of anterior cruciate ligament (ACL) injury. The literature on the association between other sagittal plane measures and the risk of ACL injuries with a prospective study design is lacking. Purpose To inv...
Article
Introduction Prior to the 2013/2014 season, the International Ski Federation (FIS) increased the helmet testing speed from 5.4 to 6.8 m/s for alpine downhill, super-G and giant slalom. Whether this increased testing speed reflects head impact velocities in real head injury situations on snow is unclear. We therefore investigated the injury mechanis...
Article
The most common events during which anterior cruciate ligament (ACL) injuries occur in football are pressing situations. This study aimed to describe the knee and hip joint kinematics during pressing situations in football games in order to identify kinematic patterns in actions with a high risk for ACL injuries. We filmed 5 female collegiate footb...
Article
Background: Detailed kinematic descriptions of real anterior cruciate ligament (ACL) injury situations are limited to the knee only. Purpose: To describe hip and ankle kinematics as well as foot position relative to the center of mass (COM) in ACL injury situations through use of a model-based image-matching (MBIM) technique. The distance betwee...
Chapter
A detailed description of noncontact anterior cruciate ligament (ACL) injury mechanisms is crucial to develop ACL injury prevention programs. A model-based image-matching (MBIM) technique has enabled detailed video analysis of injury situations, a task previously limited to simple visual inspection. The current authors have analyzed 11 different AC...
Article
Introduction Prior to the 2013–2014 season, the International Ski Federation (FIS) increased the helmet testing speed from a minimum requirement of 5.4 to 6.8 m/s for alpine downhill, super-G and giant slalom and for freestyle ski cross, but not for the other freestyle disciplines or snowboarding. Whether this increased testing speed reflects impac...
Article
Weightlifting technique can be objectively assessed from two-dimensional video recordings. Despite its importance, participants' bar trajectories in research involving the snatch or clean exercises are often not reported, potentially due to the time required to digitize video. The purpose of this investigation was to evaluate the use of an LED-base...
Article
The purpose of this study was to assess the within- and between-session reliability of lower limb biomechanics in two sport-specific sidestep cutting tasks performed by elite female handball and football (soccer) athletes. Moreover, we aimed at determining the minimum number of trials necessary to obtain a reliable measure. Nineteen elite female ha...
Article
Full-text available
ABSTRACT Player-to-player contact inherent in many unhelmeted sports means that head impacts are a frequent occurrence. Model-Based Image-Matching (MBIM) provides a technique for the assessment of three-dimensional linear and rotational motion patterns from multiple camera views of a head impact event, but the accuracy is unknown for this applicati...
Article
The cover image, by KAM MING MOK et al., is based on the Original Article The effect of overhead target on the lower limb biomechanics during a vertical drop jump test in elite female athletes, DOI: 10.1111/sms.12640.
Article
Full-text available
Background: Research on balance measures as potential risk factors for ACL injury is limited. Objective: To assess whether postural control was associated with an increased risk for ACL injuries in female elite handball and football players. Method: Premier league players were tested in the preseason and followed prospectively for ACL injury r...
Article
Background The most common movements that occur during anterior cruciate ligament (ACL) injuries in soccer are “pressing” movements. There are currently no accurate kinematic descriptions of joint kinematics in pressing movements in defensive situations. Objective To describe the knee and hip joint kinematics during pressing actions in soccer in o...
Article
Background Stiff landings with less knee flexion and high vertical ground reaction force have shown to be associated with increased risk of ACL injuries (Leppänen et al. 2016). The association between other sagittal plane measures and the risk of ACL injuries is less studied in prospective study designs. Objective To investigate the relationship b...
Conference Paper
Background Single-leg squat (SLS) is a clinical tool used to assess knee control. Previous studies have proposed that knee valgus motion in the SLS could be related to injury risk, but this association has not been previously examined. Objective The objective of this study was to investigate the association between acute lower extremity injuries a...
Article
Full-text available
Background Little research exists quantifying balance measures as potential risk factors for ACL injury. Objective To assess whether static and dynamic postural control were associated with an increased risk for ACL injury in female elite handball and football players. Design Prospective cohort study. Participants From 2007 through 2015, 838 fem...
Article
Background Few prospective studies have investigated the biomechanical risk factors of anterior cruciate ligament (ACL) injury. Purpose To investigate the relationship between biomechanical characteristics of vertical drop jump (VDJ) performance and the risk of ACL injury in young female basketball and floorball players. Study Design Cohort study...
Article
Background Poor knee alignment is associated with increased loading of the joints, ligaments and tendons, and may increase the risk of injury. The study purpose was to compare differences in knee kinematics between basketball and floorball players during a vertical drop jump (VDJ) task. We wanted to investigate whether basketball players, whose spo...
Conference Paper
Full-text available
Model Based Image Matching (MBIM) has potential to assess three-dimensional linear and rotational motion patterns from multiple camera views of head impact events in contact sports. The goal of this study is to assess the accuracy of the MBIM method for estimating 6DOF head kinematics in a vehicle-cadaver impact scenario for which Vicon motion anal...
Poster
The clean may be executed with different objectives. For example, maximal effort can be exerted during the pulling phase to elevate the barbell as high as possible, receiving the bar in a full (i.e. maximal effort clean) or partial (i.e. power clean) squat. In contrast, the barbell can also be raised to the minimal height required to receive the ba...
Poster
In the pulling phase of the clean, the ankle plantar flexors, knee extensors, knee flexors and hip extensors perform work on the athlete’s body and barbell. In other multi-joint tasks, joint kinetics do not scale linearly with changes in effort. Therefore, performing the clean with varying effort may influence training adaptions and inter-muscular...
Article
Full-text available
Purpose: To prospectively investigate the association between isolated and functional lower extremity muscle strength, and the risk for non-contact ACL injury in Norwegian female elite handball and football players. Methods: From 2007 through 2015, premier league players participated in strength testing and were prospectively followed for ACL in...
Article
There is a paucity of well-controlled anti-doping interventions. We developed and evaluated the efficacy of a doping prevention program for adolescents – the Hercules program. The program is different from most anti-doping interventions in the combination of theoretical lessons with practical strength training and inclusion of three groups of parti...
Article
The purpose of the study was to assess the within-session and between-session reliability of knee kinematics and kinetics in a vertical drop jump task among elite female handball and football athletes. Specifically, we aimed to quantify the within-session waveform consistency and between-session consistency of the subject ranking for a variety of k...
Article
Full-text available
Background: The evidence linking knee kinematics and kinetics during a vertical drop jump (VDJ) to anterior cruciate ligament (ACL) injury risk is restricted to a single small sample. Still, the VDJ test continues to be advocated for clinical screening purposes. Purpose: To test whether 5 selected kinematic and kinetic variables were associated...
Article
Poor knee alignment is associated with increased loading of the joints, ligaments and tendons, and may increase the risk of injury. The study purpose was to compare differences in knee kinematics between basketball and floorball players during a vertical drop jump (VDJ) task. We wanted to investigate whether basketball players, whose sport includes...
Article
The purpose of the study was to investigate the effect of an overhead target on the jump height and lower limb biomechanics in all three planes of motion in a vertical drop jump (VDJ) task among elite female handball and football (soccer) players. The hypothesis was that adding an overhead target to the VDJ task improves jump height, increases join...
Article
Full-text available
Introduction Several intrinsic risk factors for lower extremity injuries have been proposed, including lack of proper knee and body control during landings and cutting manoeuvres, low muscular strength, reduced balance and increased ligament laxity, but there are still many unanswered questions. The overall aim of this research project is to invest...
Article
Objective: To determine the agreement between 2-dimensional video analysis and subjective visual assessment by a physiotherapist in evaluating young athletes' knee control, and to determine the intrarater reliability and inter-rater reliability of the single-leg squat test. Design: Frontal plane knee control was assessed by a physiotherapist on...
Article
Study design: Controlled laboratory study; cross-sectional. Objectives: To investigate the relationship among anatomical variables, knee laxity, muscle strength, and peak knee valgus angles during a vertical drop-jump landing task. Background: Excessive knee valgus has been associated with anterior cruciate ligament injury in females; however,...
Article
Full-text available
The strengths of interpersonal dyads formed by the attacker and defender in one-on-one situations are crucial for performance in team ball sports such as soccer. The purpose of this study was to analyze the kinematics of one-on-one defensive movements in soccer competitions, and determine the relationships between lower limb kinematics and the cent...
Article
Full-text available
Current knowledge on anterior cruciate ligament (ACL) injury mechanisms in male football players is limited. To describe ACL injury mechanisms in male professional football players using systematic video analysis. We assessed videos from 39 complete ACL tears recorded via prospective professional football injury surveillance between 2001 and 2011....
Article
Knee valgus angles measured in sidestep cutting and vertical drop jumps are key variables in research on anterior cruciate ligament (ACL) injury causation. These variables are also used to quantify knee neuromuscular control and ACL injury risk. The aims of the current study were to 1) quantify the differences in the calculated knee valgus angles b...
Article
A complete understanding of the causes for injury requires a description of the mechanism of injury. Video analysis is the only method where we can objectively describe the motion patterns that are involved in a real injury situation. A new model-based image-matching (MBIM) method for 3D motion reconstruction from uncalibrated camera sequences was...
Article
Model-based image-matching (MBIM) technique has enabled detailed video analysis of injury situations that previously had been limited to simple visual inspection. We have analyzed anterior cruciate ligament (ACL) injury situations from ten analogue and one HD video sequences using the MBIM technique. The knee kinematical patterns were remarkably co...
Article
Unlabelled: Traumatic brain injury (TBI) is the leading cause of death in alpine skiing. It has been found that helmet use can reduce the incidence of head injuries between 15% and 60%. However, knowledge on optimal helmet performance criteria in World Cup alpine skiing is currently limited owing to the lack of biomechanical data from real crash s...
Article
Full-text available
Study design: Clinical measurement, controlled laboratory study. Objectives: To assess the relationships among real-time observational screening of frontal plane knee control and knee valgus angles and abduction moments calculated from 3-D motion analysis during a vertical drop jump. A secondary purpose was to investigate interrater agreement fo...
Article
Background Ranking the athletes according to their knee valgus angle contributes to the development of screening tools for the risk of knee injury. However, studies used different thigh marker clusters to calculate knee valgus angle in marker-based motion analysis system. There is a methodological concern on the thigh marker cluster design which re...
Article
Identifying individuals with a high risk for ACL injury is important for injury prevention. Current screening methods exist but rely on expensive and time consuming biomechanical analysis, limiting large scale application. The aim of this experiment was to investigate observational ACL injury risk assessment performance. Individual raters viewed 25...
Article
Poor frontal plane knee control is suggested to be a risk factor for anterior cruciate ligament injuries. Both 3D motion analysis and less complex methods, such as 2D video analysis and subjective assessments, have been used to assess frontal plane knee motion. However, the agreement between all three methods has not been investigated. To determine...
Article
Joint moments help us understand joint loading and muscle function during movement. However, the interpretation depends on the choice of reference frame, but the different reference frames have not been compared in dynamic, high-impact sporting movements. We have compared the magnitude and the resulting ranking of hip and knee joint moments express...
Article
Defensive actions are considered to be of major importance for success in football games, yet the biomechanical aspects of defensive actions remain unknown. Providing information on movements from real game situations is crucial, as players can learn how to improve their performance. The main purpose of this case study was to evaluate the feasibili...