Jimmy James
Contract Killer
Sounds like you're (whether deliberately or accidentally) doing HIIT. I tried that last week. It totally fucking killed me but I think it's definitely effective. Problem for me is you need a decent level of fitness to do it and I'm not quite there yet. But my aim is to get to a point where I can use HIIT as a regular technique. I never felt so exercised in my life as after one day of trying it but I could barely move for 2 days afterwards.
What's HIIT?
I'm doing Jeet Kune Do. They mix Kali and Penchat Silat because they flow. We do core training but the Muy Thai kills me the most.
I thought I was in decent shape before I started but it's a different kind of shape. I think it's better to simply begin than make excuses. You can always pace yourself.