I just finished Old School Challenge and was pleasantly surprised. I have discovered real jewels, very short but very intense and effective.

You have several options to choose from each day, there are days that you even have 3 options. If you don't have time, you can solve your training easily and very effectively.

I am very happy to have been able to overcome it. I have felt very strong and capable. A year ago I couldn't have done it. Highly recommended. More like these please! Thanks a thousand !!!