Previous studies have presented contradicting insights

The gap

Evidence profile

Sourced from the stated research gap and limitations and future-work section and stated challenges of the source papers, classified as general, drawn from work published between 2025 and 2026, spanning 5 journals. Those papers have been cited 8 times in total.

Supporting evidence — 6 representative gaps

• Triangulated evidence provides no support for bidirectional causal pathways between diet/physical activity and depression/anxiety (2025) · Psychological Medicine · cited 8× · doi

  Previous studies have presented contradicting insights on the potential causal effects of diet/physical activity on depression/anxiety. There is a need to clarify the relationship between diet/physical activity and depression/anxiety. The study aims to address this gap by using a triangulation framework.

  generalstated research gap
  Keywords: previous studies have presented contradicting insights potential causal
• Role of Exercise in Reducing Anxiety and Depression Among Adults (2026) · Academy of Education and Social Sciences Review · doi

  • Although the study included gender and education, other demographic factors like age, socioeconomic factors, and culture were not explored in the study, and this might have been a limitation to our understanding of the effect of those factors on mental health and exercise. • It did not control for factors of diet, sleep, life stressors, or concomitant mental health problems that may have played a role in relationships of exercise and both anxiety and depression.

  generallimitationsevidence 5/5
  Keywords: factors mental health exercise included gender education demographic like socioeconomic culture explored limitation understanding effect
• IMPACTOS DO EXERCÍCIO FÍSICO NA SAÚDE MENTAL E QUALIDADE DE SONO EM MULHERES FISICAMENTE ATIVAS: (2026) · Revista Ilustração · doi

  There is a lack of studies investigating the impact of regular physical exercise on mental health and sleep quality in physically active women. The current literature does not provide a clear understanding of the relationship between physical exercise and emotional variables such as stress, anxiety, and depression.

  generalstated research gapevidence 5/5
  Keywords: there lack studies investigating impact regular physical exercise
• Investigation of The Relationship Between Communication Skills, Achievement Motivation, and Anxiety in Exercising and Non-Exercise Women (2026) · Turkish Journal of Sport and Exercise · doi

  Further studies can investigate the long-term effects of exercise on communication skills, achievement motivation, and anxiety. Research can explore the impact of different types of exercise programs on women's psychosocial profile. Studies can examine the relationship between exercise habits and men's psychosocial profile.

  generalfuture-work sectionevidence 5/5
  Keywords: further studies investigate long-term effects exercise communication skills
• Optimal exercise modality and dose to improve depression in children and adolescents: a systematic review and Bayesian network meta-analysis (2026) · Frontiers in Psychology · doi

  Depression is a primary cause of functional impairment and psychological distress in children and adolescents. There is a lack of quantitative references for exercise interventions targeting depression in children and adolescents. The relationship between exercise dose and treatment effect is complex and non-linear.

  generalstated challengesevidence 5/5
  Keywords: depression primary cause functional impairment psychological distress children
• IMPACTOS DO EXERCÍCIO FÍSICO NA SAÚDE MENTAL E QUALIDADE DE SONO EM MULHERES FISICAMENTE ATIVAS: (2026) · Revista Ilustração · doi

  Future studies should investigate the impact of regular physical exercise on mental health and sleep quality in other populations. Future studies should control for other factors that may influence mental health and sleep quality. Future studies should explore the potential benefits of regular physical exercise for mental health and sleep quality in different contexts.

  generalfuture-work sectionevidence 4/5
  Keywords: future studies investigate impact regular physical exercise mental

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