I really like all three PHAs as options for metabolic training ... there's something about switching from upper body to lower body and back that allows me to keep up with Cathe's pace ... when I think I need a break cardio-wise, I actually don't due to the switch. You might consider checking the chapters in the two user guides to compare the exercises in each workout to see which you might prefer ... the user guides give a full breakdown while the videos give you a sample. I enjoy the variety in all 3.
PHA 3 is my favorite, although I also like PHA 2! PHA 3 keeps my heart rate higher and works some muscles from different angles. The original PHA is my LEAST favorite because she repeats the segments 3 times -- I hate that much repetition. Just my opinion.
I like both PHA2 and PHA3. I find PHA3 especially is also a good cardio workout. Like exercise-lover the original PHA is my least favorite due to the repetition, when I do this one I tend to do the premix with only 2 repeats and then add on the Abs bonus.
I think all the of them are quite different. The first one is classic weight training moves (no frills!) and as others have mentioned you do three rounds. Number two has more variety and of course two rounds and number three uses more metabolic moves for an enhanced cardio effect. I'd say you can use the heaviest weights on number one, then number two and for three I tend to go a bit lighter because the challenge is slightly different. As others have said, get them all!!!!
Finally had a chance to complete the entire PHA3- loved it! Just when I thought Cathe couldn’t get any more innovative! Next purchase will be PHA training to complete the collection, why not right? Thanks again for all of the advice!