A 19-year-old gym goer took to TikTok to share what he ate throughout the day as part of a 10,000 calories challenge, in a video that has been viewed more than 570,000 timesA 19-year-old gym goer took to TikTok to share what he ate throughout the day as part of a 10,000 calories challenge, in a video that has been viewed more than 570,000 times