Much scholarship has already attended to the ways that social media influencers engage in affective labor to hail audiences and establish familial relationships with their audiences (Garcia-Rapp 2017; Duffy and Hund 2015) We seek to expand on these conversations to address the tensions between influencer culture, fitness culture, and digital culture to explore how fitness influencers on TikTok integrate wearable and health monitoring technology (e.g. Apple watches, fitbits, and health tracking apps) into their content. Building upon Soto-Vásquez’s (2021) notion of “fit subjectivities,” we argue that fitness influencers are engaging in self-disciplinary practices that model working towards achieving the ultimate “fit”/normative body. Further, this labor is highly gendered, aligning with post-feminist ethos of self-discipline and individual choice through consumption (McRobbie 2008). Furthermore, the social components of wearable tech, fitness tracking apps, and affective labor perpetuate the ideal “fit” body through self-discipline, simultaneously encouraging “friendly” competition through gamified fitness challenges (like closing rings on the Apple Watch or the viral “12/3/20” treadmill exercises), body metric tracking, and public leaderboards, further rendering the body subject to public scrutiny on both fitness and social media platforms. These tools are presented as the pathway to achieving a “fit” body, through a community of fitness influencers who use affect to intentionally situate themselves as the leaders of supportive families/communities in which the reward for participating in fitness facilitated by wearable tech is the idealized “fit” body. Through a thematic analysis of fitness influencers who use wearable tech on TikTok, we aim to illuminate how fitness influencers use emotion and familial bonds to maintain followers while also promoting the ideal “fit” body through self-discipline via wearable tech.