On TikTok, vagus nerve stimulation sounds like a miracle cure. Influencers claim it can help with a long list of ailments, including—but not limited to—anxiety, stress, depression, and inflammation.

‘Start in a high plank position with hands slightly wider than shoulder-width,’ instructs Livemore. Engage your core and glutes, and maintain a straight line from your feet to your head. ‘With elbows ...