Life This unconventional tummy workout is viral on TikTok, but fitness experts warn people to ‘be careful’ May 26, 2021May 26, 2021Sara M Moniuszko, USA TODAYComments Off on This unconventional tummy workout is viral on TikTok, but fitness experts warn people to ‘be careful’ There's a bizarre-looking workout that has taken TikTok by storm, but is it worth the hype? We talked to fitness experts to find out.