“…For example, they can be used to increase PA levels -albeit with modest evidence (e.g., Larsen et al, 2019;, and to reduce sedentary behaviors (e.g., Stephenson et al, 2017). They can support goal-setting (e.g., Kirwan et al, 2013), provide instructions and digital coaching (e.g., Sell et al, 2019), and provide social support (e.g., Sullivan & Lachman, 2017). They can also make PA more entertaining through exergames (e.g., Kari et al, 2020;Loos & Zonneweld, 2016) or gamification ).…”