Why recovery is the key to effective exercise: How to reboot your workout routine

"The reality is that exercise hurts our bodies. And recovery heals them. When we work out, we push our bodies to the point of cellular breakdown with the intention of building them back up stronger and more efficient. With every strenuous bike ride, weight training session or bout of high-intensity interval training, we give rise to this process.
That's why allowing our bodies the time and support to recover is crucial to the effectiveness of our exercise programs."