But here is the weird part: your heart isn't a metronome. It doesn't beat at a perfectly steady rate. Healthy hearts have a phenomenon called Heart Rate Variability (HRV). When you breathe in, your heart speeds up slightly. When you breathe out, it slows down.
But in our quest to optimize the beat, are we forgetting to feel it? Heartbeat
A moody black-and-white shot of someone holding their chest, or an EKG line morphing into a mountain range. But here is the weird part: your heart isn't a metronome