ICI Podcast 260 Understanding Heart Rate Variability HRV and measuring HRV using the ithlete iPhone app

Summary: When should you go hard... and when should you take it easy? It's a great question. Often our response depends on very subjective feelings = we may think we know, but we really aren't completely sure. As Jim Karanas pointed out in his Intervals post this week, we are often too focused on the Work […]