OBJECTIVE To determine the reach and adoption of a coach-led exercise training programme for lower limb injury prevention. DESIGN Secondary analysis of data from a group-clustered randomised controlled trial. SETTING A periodised exercise training warm-up programme was delivered to players during training sessions over an 8-week preseason (weeks 1-8) and 18-week playing season. PARTICIPAN...

OBJECTIVE To evaluate whether the axonal protein neurofilament light (NFL) in serum is a sensitive biomarker to detect subtle brain injury or concussion in contact sports athletes. METHODS Two prospective cohort studies involving (1) 14 Swedish amateur boxers who underwent fluid biomarker assessments at 7-10 days after bout and after 3 months of rest from boxing and (2) 35 Swedish professiona...

Change of direction ability is an essential pre-requisite in team sports athletes. The Illinois change of direction test has been routinely used for testing change of direction ability in soccer players. The aim of the present study was to evaluate the Illinois change of direction test in young elite soccer players in terms of its reliability, usefulness and relationship with body size. A total...

Background: Jumping and landing are common activities in soccer, i.e., associated with Anterior Cruciate Ligament (ACL) injuries in the players, especially when experiencing fatigue. The current study aimed to compare the kinematics of the lower limb joints in jump-landing maneuver among soccer players with and without a history of anterior cruciate ligament reconstruction. Methods: Among acti...

The purpose was to determine running economy and lactate threshold among a selection of male elite football players with high and low aerobic power. Forty male elite football players from the highest Swedish division (“Allsvenskan”) participated in the study. In a test of running economy (RE) and blood lactate accumulation the participants ran four minutes each at 10, 12, 14, and 16 km•h at hor...

The COVID-19 pandemic has monopolized communication and media information for months, becoming the first global social fact in digital age.
 In a new redefined communicative space, characterized by pervasive presence of media, each source needs to establish specific positioning strategy crowded field. article aims at investigating impact those processes on production, spread use institutio...

We consider games of complete information with r ≥ 2 players, and study approximate Nash equilibria in the additive and multiplicative sense, where the number of pure strategies of the players is n. We establish a lower bound of r−1 √ lnn−2 ln lnn−ln r ln r on the size of the support of strategy profiles which achieve an ε-approximate equilibrium, for ε < r−1 r in the additive case, and ε < r− ...

BACKGROUND Ice hockey is a fast-paced collision sport that entails both intentional (ie, body checking) and incidental contact that may involve the head. The objective of this study was to determine the incidence of concussions in relation to games/practices and age among competition-level youth ice hockey players (ages 12-18 years). METHODS Participants included 397 youth ice hockey players ...

BACKGROUND Professional musicians have high rates of musculoskeletal pain, but few studies have analysed risks by work activities or the psychosocial work environment. AIMS To assess the prevalence and impact of musculoskeletal pain, and its relation to playing conditions, mental health and performance anxiety, in musicians from leading British symphony orchestras. METHODS Musicians from si...