You can always try the T25 program, which is like the Insanity program but shorter (~25 minutes per workout versus 40-60... I think). Same idea though, short bursts of high-intensity cardio or body-weight training with shorter bursts of low-intensity work (the reverse of typical interval training).
"Well, evolution is a theory. It is also a fact. And facts and theories are different things, not rungs in a hierarchy of increasing certainty. Facts are the world's data. Theories are structures of ideas that explain and interpret facts. Facts don't go away when scientists debate rival theories to explain them. Einstein's theory of gravitation replaced Newton's in this century, but apples didn't suspend themselves in midair, pending the outcome. And humans evolved from ape- like ancestors whether they did so by Darwin's proposed mechanism or by some other yet to be discovered."
-Stephen Jay Gould
-Stephen Jay Gould


