Sports performance could be affected by placebo and nocebo effects. The last literature review on placebo and nocebo effects on sports and exercise performance was published in 2019. In the past five years, several new studies have been published. This review aimed to update the previous synthesis and evaluate the results of new studies focusing on placebo or nocebo interventions in sports and exercise by determining the form and magnitude of their effect. Hence, we searched for empirical studies published from 2019 until the end of May 2024 indexed in PubMed, Medline, Web of Science, EBSCO, and Google Scholar databases. The search yielded 20 eligible studies with control or baseline-control conditions, focusing on nutritional, mechanical, and other mixed ergogenic aids. They yielded small to large placebo effects (Cohen’s d) for nutritional (d = 0.86), mechanical (d = 0.38), cream and gel (d = 0.05), and open-label placebo (d = 0.16) interventions. The pooled effect size for placebo effects was moderate to large (d = 0.67), larger than in the earlier review, suggesting that placebo effects can improve motor performance even more than previously reported. However, based on five measures from three studies, the nocebo effects were almost twice as large (d = 1.20). Accordingly, the current findings support and expand the last review in the field by yielding additional support for placebo and nocebo effects in sports and exercise.

Exercise addiction is widely studied, but an official clinical diagnosis does not exist for this behavioral addiction. Earlier research using various screening instruments examined the absolute scale values while investigating the disorder. The Exercise Addiction Inventory-3 (EAI-3) was recently developed with two subscales, one denoting health-relevant exercise and the other addictive tendencies. The latter has different cutoff values for leisure exercisers and elite athletes. Therefore, the present 15-country study (n = 3,760) used the EAI-3 to classify the risk of exercise addiction (REA), but only if the participant reported having had a negative exercise-related experience. Based on this classification, the prevalence of REA was 9.5% in the sample. No sex differences, and few cross-national differences were found. However, collectivist countries reported greater REA in various exercise contexts than individualist countries. Moreover, the REA among athletes was (i) twice as high as leisure exercisers, (ii) higher in organized than self-planned exercises, irrespective of athletic status, and (iii) higher among those who exercised for skill/mastery reasons than for health and social reasons, again irrespective of athletic status. Eating disorders were more frequent among REA-affected individuals than in the rest of the sample. These results do not align with recent theoretical arguments claiming that exercise addiction is unlikely to be fostered in organized sports. The present study questions the current research framework for understanding exercise addiction and offers a new alternative to segregate self-harming exercise from passionate overindulgence in athletic life.

Background and Aims: Gambling disorder (GD) presents significant psychological, financial, and social consequences. Mindfulness-based interventions (MBIs) have emerged as promising adjunctive treatments. However, the evidence base remains heterogeneous. The present systematic review evaluated the current empirical literature on MBIs for GD, focusing on their efficacy, methodological quality, and limitations.MethodsScopus, PubMed, Web of Science, EBSCO, and PsycINFO were searched for English-language studies published between 2012 and April 2025. The final sample comprised 12 studies: five randomized controlled trials, one controlled pilot study, two repeated-measures studies, one mixed-methods study, and three single-group pretest–posttest studies. A narrative synthesis evaluated MBI impacts.ResultsMBIs consistently reduced gambling frequency and cravings while enhancing psychological outcomes. Studies combining mindfulness with cognitive behavioral therapy showed significant declines in problem gambling behavior. Psychological distress and cravings also decreased notably across interventions. The mindfulness components employed varied in focus and application, adding nuance to outcome interpretation. However, it remains unclear to what extent the observed effects can be attributed to mindfulness-specific mechanisms.Discussion and ConclusionsMBIs show promise as a complementary treatment for gambling disorders, although small sample sizes and methodological limitations suggest a need for more robust research.

Expectancy effects are crucial determinants of placebo responses; however, neglecting differences in agent-specific beliefs may lead to an underestimation of response effects. This study had two main goals: (1) to theoretically explore how individual differences in expectations about agents influence response outcomes, and (2) to create a visual tool for assessing stimulus-specific expectancies. The sample included 435 adults (58.5% female) who answered demographic questions and completed six image-based items (red pill, white powder, green drink, chocolate bar, injection syringe, and electrical stimulation device), each designed to assess beliefs about the potential of these agents to boost performance. Expectancy assessments focused on anticipated physical and mental performance effects rather than on clinical or therapeutic outcomes. Logistic modeling illustrated that combining high- and low-expectancy individuals can attenuate apparent group-level expectancy effects, highlighting a potential measurement and inference concern in placebo research. Participants who were non-superstitious and non-religious reported significantly lower stimulus expectancy than others. Confirmatory factor analysis (CFA) confirmed the unidimensional structure of the Stimulus Expectancy Assessment Tool (SEAT), showing excellent fit (CFI = 0.974, TLI = 0.952, RMSEA = 0.086, SRMR = 0.032) and good internal consistency (Cronbach's α = 0.84). The latent factor accounted for an average of 48% of the variance in expectations, ranging from 21% to 66% across the six indicators. These results suggest that placebo effects may be underestimated when variability in expectancy is ignored. The SEAT offers a flexible, image-based method for identifying stimulus-specific expectancy profiles.

Background and Aims: While regular physical activity provides many health benefits, exercise can cause more harm than good when done excessively to the point where a person loses control. This condition has been called various names, but the most accurate term is ‘exercise addiction’ (EA) because it reflects both compulsive behavior and dependence. EA is classified as a non-substance-related addictive disorder, or behavioral addiction, and has been the subject of research for over fifty years. However, it is not officially recognized in major diagnostic systems, mainly due to significant conceptual and measurement challenges. This paper provides an overview of current knowledge on EA, including its causes, assessment issues, epidemiology, associated conditions, negative effects, and options for treatment and prevention. Methods: An evaluation-driven narrative review was conducted which synthesized findings from empirical research and theoretical models adopted across EA research. It critically examined prevailing conceptualizations, methodological challenges, and potential treatment approaches. Results: Epidemiological findings are inconsistent and report inflated prevalence rates, partly due to reliance on self-report instruments that often fail to distinguish pathological exercise from passion. Etiological models emphasize the complex interplay between biological, psychological, and behavioral factors. Negative consequences include physical injury, emotional distress, and social strain. Evidence for effective interventions remains sparse. Discussion and Conclusions: Despite growing interest, progress remains slow. There is a need for larger, longitudinal, and experimental studies to advance understanding. Though not included in the DSM-5, greater clinical awareness is vital for early detection and prevention. EA is clinically relevant but still poorly defined, requiring robust empirical and theoretical work.