Risk factors for injury and illness in youth floorball players – A prospective cohort study

Changes in Sleep, Stress, and Fatigue Were Not Prospectively Associated With Running-Related Injuries Among High School Cross Country Runners

“…6,17 Further, the definition of stress and fatigue, and how and when they are measured, is highly variable and may contribute to the mixed findings of previous research. For example, both 0 to 10 scales and 5-point Likert scales have been utilized, and stress and fatigue have been measured at preseason only or at weekly intervals, 7,17 whereas our study measured stress and fatigue daily and then aggregated it to a weekly total. Future work should aim to standardize the measure(s) and frequency of assessments used to quantify stress and fatigue, as well as sleep, to clarify the importance of these variables on subsequent injury risk.…”

“…Although our findings among boys were unexpected, increased stress compared with the previous week being associated with an increased odds of RRI among girls is consistent with earlier work in youth athletes. 7,17 Boys experienced relatively few RRI compared with girls overall which contributed to large variability in the probability of RRI among boys (Figure 1), particularly when stress levels decreased by a large amount (eg, >10%). In addition, it is possible that factors we were unable to account for, given the limited number of RRI observed and number of variables already included in our models, could also influence changes in stress.…”

“…Our study utilized prospective, daily surveys, while previous work finding worse sleep quality being associated with injury utilized postseason surveys or surveyed on a weekly basis. 6,17 Further, the definition of stress and fatigue, and how and when they are measured, is highly variable and may contribute to the mixed findings of previous research. For example, both 0 to 10 scales and 5-point Likert scales have been utilized, and stress and fatigue have been measured at preseason only or at weekly intervals, 7,17 whereas our study measured stress and fatigue daily and then aggregated it to a weekly total.…”

“…13 Similarly, poorer sleep quality, regardless of duration, has been associated with increased odds of injury among collegiate runners and youth floorball athletes. 6,17 As sleep duration and quality have not yet been evaluated in adolescent runners but have been related to injury in other athlete populations, assessing sleep in this population is warranted.…”

“…Increased psychological stress in a given week has also been associated with increased injury risk during the subsequent week in youth athletes. 17 Similarly, soccer athletes who went on to sustain an injury were identified as being more susceptible to stress based on a preseason survey. 7 Further supporting the importance of stress as a risk factor for injury, a randomized control trial assessing a stress reduction intervention in soccer athletes found a reduced number of injuries after the intervention compared with the control group.…”