B: Increased heart rate during dives

Wed, 06 May 2026 17:13:45 +0000

# Increased Heart Rate During Dives: Why Your Heart Races Underwater and What It Means Diving—whether you're exploring coral reefs, taking breathless moments in a pool, or training for technical dives—puts unique demands on your body. One of the most noticed physiological responses is an increased heart rate during dives, a natural reaction rooted in your body’s effort to maintain efficiency under submerged conditions. Understanding why your heart rates up underwater can enhance safety, performance, and overall diving experience. ## Why Does Your Heart Rate Increase When Diving? Heart rate elevation during dives is primarily driven by two key factors related to your body’s underwater environment: