To Slow Your Heart Rate. Try the 4-7-8 breathing technique. When your heart rate is too slow its referred to as bradycardia.

If you have bradycardia your heart beats fewer than 60 times a minute. The hearts of adults at rest usually beat between 60 and 100 times a minute. Whats considered too slow can depend on your age and physical condition.
Whats considered too slow can depend on your age and physical condition.
Many lifestyle habits can contribute to lower the resting heart rate in the long term. There are many ways to slow a high heart rate including lifestyle changes and weight loss. Try the 4-7-8 breathing technique. Focus on exhaling completely to reduce your heart rateXResearch source.