Loneliness in sport: A systematic mixed studies review

Loneliness is an established risk factor for mental and physical health problems. Individuals involved in sport face many unique stressors, some of which could exacerbate the risk of loneliness. To bring clarity to published evidence in this area, inform future research, and develop applied recommendations to prevent and reduce loneliness in the sport community, we sought to systematically review, synthesise, and appraise research on loneliness in sport. Following electronic database and manual searches to identify literature on loneliness in the sport community up to August 2024, we included and thematically synthesised data from 194 studies (N = 88516). Social loneliness was the most common conceptualisation of loneliness within the literature. We identified socio-cultural, institutional, interpersonal, and intrapersonal risk factors associated with loneliness. There was less evidence for protective factors, but the available evidence was categorised into interpersonal and intrapersonal factors. Finally, there was substantial evidence concerning adverse consequences associated with loneliness in sport, including: impaired mental health and wellbeing; adverse social outcomes; negative cognitive, affective, and motivational outcomes; and maladaptive behavioural outcomes. Overall, this review advances knowledge by synthesising, for the first time, evidence on loneliness in sport and offers theoretical, methodological, and practical contributions that extend understanding of loneliness.