I like to use HIIT sprints for getting extra lean right before summer. Typically I used a fixed sprinting time (or distance) and fixed rest time.

Health Habits outlined an HIIT setup called Pyramid Intervals that look a little different.

Sprint full out for 10 seconds
Rest 10 seconds
Sprint full out for 10 seconds
Rest 20 seconds
Sprint full out for 10 seconds
Rest 30 seconds
Sprint full out for 10 seconds
Rest 40 seconds
Sprint full out for 10 seconds
Rest 50 seconds
Sprint full out for 10 seconds
Done

Link: The Best HIIT Workout Of ALL Time.
The post An HIIT Pyramid Sprinting Workout appeared first on Fitness Black Book.

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