740 d = 0.14) did not differ between the concussed and control groups regardless of bodyweight normalization (P ≥. The maximal voluntary isometric contraction torque (concussed: 635.60 N Parametric and nonparametric analyses, 95% confidence intervals (95% CIs), and Hedges g (parametric) and Spearman ρ (nonparametric) effect sizes were used to examine group differences (α =. Unnormalized and bodyweight-normalized quadriceps maximal voluntary isometric contraction torque (in newton meters), unnormalized and bodyweight-normalized electrically stimulated SB torque, pain (numeric 1-10) during SB, and the central activation ratio (in percentage) were assessed via the SB.
Prospective, cross-sectional cohort laboratory study.Ĭoncussed and healthy participants (n = 24 58% male, age: 19.3 y, mass: 70.3 kg, height: 177.3 cm) completed the superimposed burst (SB) neuromuscular assessment on their dominant limb within 72 hours after self-reporting asymptomatic (22.4 d postinjury). Therefore, our study aimed to examine voluntary and involuntary muscle activation between college-aged, concussed individuals when symptom-free and healthy matched controls. Existing research has only examined voluntary muscle activation, limiting mechanistic understanding. Neuromuscular function is altered acutely following concussion and theoretically linked to the subsequent postconcussion musculoskeletal injury risk. This study adds to the growing body of literature linking orthopedic injury in those no longer displaying the acute signs and symptoms of concussion. The kinematic patterns demonstrated in individuals with a concussion history may be suggestive of increased knee injury risk. Participants with a concussion history demonstrated decreased knee varus (left: Mconc=-0.5☑.0°, Mctrl=3.6☑.0° right: Mconc=5.1☑.2°, Mctrl=7.8☑.12°) and external rotation (left: Mconc=2.5☑.6°, Mctrl=13.0☑.5° right: Mconc=7.7☑.6°, Mctrl=12.8☑.5°) regardless of whether the cut was oriented towards to the left or right. Peak center of mass and peak knee angles during the landing phase of a jump-cut maneuver were evaluated. This study examined kinematics during a jump cut motion in young adults with a concussion history (n=9 4 males, 5 females 3.1years' post-injury) and 10 controls (6 males, 4 females). However, little is known about how people modify their movements post-concussion. Recent evidence suggests that athletes are at a higher risk of lower-body injuries in the months and years following a concussion.
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