“…Furthermore, adolescence is a time of rapid physical, cognitive, emotional, and behavioral change, and when potentially harmful health habits, such as physical inactivity, can become entrenched (Tohi et al, 2022;World Health Organization, 2017). To date, much research has focused on adolescent females' low levels of PA (Sturm et al, 2021;Thøgersen-Ntoumani et al, 2022), yet adolescent males are failing to reach the World Health Organisation recommendation of 60 min of PA a day, with only 49.4% in the United Kingdom and 30.9% in the United States of America adequately active for a healthy lifestyle (Lin, 2022;Sport England, 2021). There is a need for in-depth, theoretically informed, qualitative research to gain a greater understanding of how adolescent males' identity and relatedness to significant others influence their decision making and motivation around PA.…”