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For example, the "p90x workout videos" DVD is a 53-minute workout that works the chest muscles with variations of the push-up, including traditional push-ups, wide-stance “fly” push-ups, and push-ups done with your hands close together. It targets the back muscles with variations of the pull-up or pull-down exercise done with resistance bands, including pull-ups/pull-downs with your hands at shoulder width, wider, narrower, or reverse grip. It also includes rowing exercises done with dumbbells or resistance bands.

The 59-minute “p90x workout dvd” workout is the most intense in the P90X system. After a lengthy warm-up, this cardiovascular routine leads you through a series of jumping moves that primarily work the lower body. You'll need a good pair of shock-absorbing shoes and a soft landing surface for this one. (Because it's high impact, skip it if you have lower back, hip, knee, or ankle problems.)

Even the wholesale p90x yoga workout is intense: It's 90 minutes long, and quite challenging, especially to those not accustomed to yoga.  

The P90X system is based on the concept of "muscle confusion," which means varying the workout schedule and introducing p90x workout  new moves so the body never fully adapts. This is similar to the periodization techniques athletes use to get their bodies in top condition.  It also has a basis in science; research suggests that workout programs that offer variation bring greater benefits than those that do not p90x workout sheets.