female human 21 male 19 adult 16 controlled study 14 Article 12 major clinical study 11 Humans 10 adolescent 9 article 8 Adolescent 7 Female 7 cross-sectional study 7 Male 6 human experiment 6 sport 6 athlete 5 young adult 5 Adult 4 Surveys and Questionnaires 4 United States 4 exercise 4 physical activity 4 questionnaire 4 Exercise 3 Young Adult 3 aged 3 anxiety 3 child 3 cohort analysis 3