First, let me say that this routine is a great replacement for those who cannot quite endure P90X Plyometrics and want a strong (low impact) leg and cardio workout. Many other reviews praise this 40 minute interval rollercoaster and fat burning routine. While this routine flows well and forces you stay to stay in zone throughout, it is certaintly not the same as other forms of High Intensity Interval Training or (HIIT). Please do not misinterpret my assessment here. This Interval X routine is a great workout, and one that I will repeat many times in my off-season.
The routine plows through about 15 move sequences of mostly one minute starting with a 20 second setup (or slow intensity) moving to intermediate for the next 20 seconds and going all out the last 20 seconds. The key on interval training or HIIT, is to start with a slow set (i.e. 30 second jogg) and then push to 90% of your maximum speed (i.e. 30 second sprint) forcing a dramatic body tempo constrast that it shocks your metabolic state. The contrast in P90X Interval is not as dramatic given the need for readiness for back-to-back moves for 30 minutes non-stop. However, what this workout may lack in contrast, it makes up in intensity and good design flow between moves.
The bottom line is that HIIT is a must if you want to see radical improvoment. I tried it during my training for a marathon several year ago and it made a huge difference for me. It’s time to dump your ‘even keel’ Lifecycle boring machine routine. Research shows that Interval training is more efficient on improving your cardiovascular capacity and surprisingly the majority of calories burned will come after your workout. So what’s not to like about it? Again, this is an awesome workout.
Interval X Score: A
