Track your heart rate variability and train at your best! When you are resting your heart rate naturally varies in pace. Patterns in heart rate variability (the "R-R intervals") can reveal important information about how an athlete's body is recovering from training and can be used to by athletes and coaches alike to optimize training programs for peak performance.

This app uses the Wahoo Fisica sensor key device to record the R-R intervals from any compatible heart rate strap to track heart rate variability in athletes. The recorded data is stored in HRM format files for easy use in heart rate variability analysis software, and can be either sent via email or transferred using iTunes file sharing.