HRV tracker is designed to log R-R intervals from an ANT-compatible heart rate strap. This application can receive data from either a serial-port ANT receiver device (e.g.: the SparkFun ANT USB stick) or the ANT USB receiver stick that ships with many ANT-compatible heart rate monitors and GPS units (e.g.: Garmin ForeRunner series).

Features:
Record from either consumer ANT receivers (e.g.: GPS or heart-rate monitors) or serial-port ANT receivers
Script-based recording for automated tracking
Record R-R intervals to text files for import in analysis applications. Log files are automatically time stamped for improved record-keeping.
HRV tracker is designed for Microsoft Windows using the .NET framework, with C# source code written in Visual Studio 2008. Mac OSX version is currently available in BETA.

For more information on how to use heart rate variability analysis to improve your training performance Peak Performance has a comprehensive article at http://www.pponline.co.uk/encyc/heart-rate-variability-analysis-how-to-improve-your-training-performance-40837

HRVathlete has been developed by the sports scientists at FitSense Australia and is based on their work in heart rate variability since 2001. During this time, they have established a reliable means of monitoring the level of fatigue in athletes, thus allowing coaches to maximise performance and reduce injury.

HRVathlete analysis has been used with Olympic and world champion cyclists and triathletes, as well as a large number of teams at an elite and professional level. 

HRVathlete is best used to objectively measure athlete fatigue/recovery and provide feedback to coaches who can fine tune training loads to maximise performance and reduce injury risk.

HRVathlete is web-based hence you can access it from virtually anywhere you have an internet connection