I switched it up this week to add in some easy cardio. My sessions consist of Cardiovascular Low Intensity Training (CLIT). I am just burning some calories and keeping my heartrate around 135-145. This is usually done with some walking on treadmill at 3.5mph with 12 incline. Does anyone have experience with this? I was running and pushing myself harder and the heartrate was average 172 and was very tired after. However, with the CLIT, I don't even feel tired at all and I'm concerned that I am wasting my time.