HIIT session length
Trying to look at a watch while doing an all out sprint is pretty difficult, you might be better off to count strides... or I perfer to pace off a 100 yard distance (~100 giant steps?), and sprint that distance, then walk slowly back to the beginning, or better yet sprint 70 yards up a steep hill and then walk slowly back down the hill...
I have tried HIIT with other cardio (swimming, jump rope, etc.), although they are a nice change and may be easier to do in limited space, I don't feel the same benefit as sprinting. A good 100% effort sprint with your arms pumping hard (especially up hill!) works your thighs, calves, hamstrings, butt, abs, shoulders, arms, chest, back, core... essentially your whole body! Perhaps it has something to do with the fact that the human body evolved for running; after food and away from danger!
Trying to look at a watch while doing an all out sprint is pretty difficult, you might be better off to count strides... or I perfer to pace off a 100 yard distance (~100 giant steps?), and sprint that distance, then walk slowly back to the beginning, or better yet sprint 70 yards up a steep hill and then walk slowly back down the hill...
I have tried HIIT with other cardio (swimming, jump rope, etc.), although they are a nice change and may be easier to do in limited space, I don't feel the same benefit as sprinting. A good 100% effort sprint with your arms pumping hard (especially up hill!) works your thighs, calves, hamstrings, butt, abs, shoulders, arms, chest, back, core... essentially your whole body! Perhaps it has something to do with the fact that the human body evolved for running; after food and away from danger!