Control your heartbeats

Beware, this lesson is all about control. You decide where your borders are. You feel what you feel. Interval training is all about being in control of your body AND mind.
After the warming up at 60% of you Max/Hr your heartbeats will be between 75 and 92%.
Keep your upper body relaxed, no strength in the muscles you do not use. No tension in your back, lower your shoulders, open your chest and breathe with your diaphragm.
In the lower heartrate zones, deep breaths through your nose and out through your mouth so you can lower your heartbeats.