“…According to the social interaction hypothesis, the social relationships and social support that emerge among those who take part in regular group-based PA activities may help to deal with physical and mental health problems (Ransford, 1982;Teychenne, Ball, & Salmon, 2008) by creating broader social networks, avoiding feelings of loneliness, and increasing personal resources such as self-esteem (Pels & Kleinert, 2016). Within the work-context, group-based PA participation with work colleagues can provide a large number of opportunities for social interactions (Bruton, Vurnakes, Martin, Perry, & Henderson, 2012). A sense of belonging and warm relationships with work colleagues in group-based PA sessions may, consequently, be effective in improving relatedness satisfaction among teachers at work (Andersen et al, 2015;Arrogi, Schotte, Bogaerts, Boen, & Seghers, 2017).…”