Summary of a survey study discussing how sleep and diet influence a risk of injury in adolescent elite athletes.
340 (Females: 162 Males: 178) high school elite athletes aged 17.1 (±0.9) (Females: 17.1 (±0.9) Males: 17.1 (±1.0)) (Sweden).
Sports: athletics, cross-country skiing, downhill skiing, freestyle skiing, handball, orienteering, ski orienteering.
Web-based survey (2 times: autumn and spring semester).
- sports injuries (“any physical complaint resulting in reduced training volume, the experience of pain, difficulties participating in normal training or competition, or reduced performance in sports”, self-reported)
- sports participation
- training variables
- alcohol intake
- sleep (average hours on weekdays and weekends)
- stress (Perceived Stress Scale)
- nutrition (Swedish Nutrition Food Agency Index)
- self-esteem (Competence-Based Self-Esteem Scale)
- 313 (92%) athletes in the autumn semester and 260 (76%) athletes in the spring semester provided complete data. Additionally, 105 (31%) athletes responded once (in autumn or spring semester only).
- Female athletes reported higher stress. 18-19 years old athletes reported higher stress than 16-year-olds.
- 45.1% of females and 46.1% of males consumed alcohol. 0.9% smoked.
- No differences between gender or ages for the Swedish Nutrition Food Agency Index.
- Guidelines for fruit and vegetable intake (once a day) and fish (twice a week) were not met by 20%, 39%, and 43% of athletes, respectively. A higher proportion of males than females did not meet the fruit and vegetable recommendations. A lower proportion of 18-19-year-olds did not meet vegetable recommendations than 16-year-olds.
- Females had higher Competence-Based Self-Esteem Scale scores than males, with no age differences (lower scores are better).
- 18.5% of athletes did not sleep 8 or more hours on weekdays, and 1.0% on weekends.
- 32.9% of athletes got injured during the autumn season and 28.4% during the spring season.
- Athletes sleeping more than 8 hours during weekdays and meeting nutritional recommendations (fruits and vegetables once a day, fish twice a week) had lower odds of sustaining a new injury. 61% reduction for athletes who slept and 64% reduction for athletes who met nutrition recommendations.
Take home message
Von Rosen P, Frohm A, Kottorp A, Friden C, Heijne A. Too little sleep and an unhealthy diet could increase the risk of sustaining a new injury in adolescent elite athletes. Scandinavian journal of medicine & science in sports. 2017 Nov;27(11):1364-71.