The 25 seconds HIIT Aerobic Program

This workout is intense, long, and very fun to complete (we all have different definitions to the word fun. Mine is sweat, lactic acid, and 160 bpm). The 25 seconds HIIT (High Intensity Intervals Training) program is based on the a “pyramid” of a “rest” time  period followed by a steady “work” time period of 25 seconds. […]