The other day I previewed a workout I saw on AthleteonFire. It looked awesome and I just wrapped it up. On paper, it doesn't look horrible. However, when you do it, it kicks your a$$ a bit. I like the addition of a time goal. I won't say it's a constraint, but merely a goal. It is awesome and total body. With an absence of equipment, I found it even more appealing. Give it a try and let me know what you think.
I am not sharing my time with you, but will say that the 20 minute mark is still a goal. Hey, nobody said it would be easy right?