I think the point is that, while continually delivering weights workouts, Cathe has tried here to deliver in a different way. We already have so many DVDs where the emphasis is on barbell squats, lunges, plie squats, deadlifts, i.e., traditional exercises. We all know it so well, we could all go to our exercise rooms right now and reproduce this workout without slotting in any DVD.
Xtrain legs does something different. Its focus is on endurance rather than heavy weights and on hitting the muscles of the legs and glutes from different angles, working all the while on increased stability. In this way, if you do Xtrain legs and also Legs & Glutes, or your other fave leg workout, you will have a more rounded program and be better protected against injury. For example, the traditional Cathe heavy weights leg workout emphasizes the gluteus maximus repeatedly, but not the gluteus minimus or medius. As a runner, a couple of years back I suffered an injury and pain in my hips and knees, even though I had been doing Cathe leg workouts religiously, simply because the other gluteal muscles had been neglected. The sorts of exercises they gave me to do in physiotherapy, hello! are reminiscent of the work Cathe includes on XTrain with the gliding discs. Yes, these use no weight, because no weight is needed. The gluteus medius and minimus do not need heavy weights to train and strengthen them, they are smaller muscles.
Likewise, the barre work and gliding disc work continue to work the inner and outer thigh, areas all women want to train to have shapely legs. But, again, these areas don't need supremely heavy weights, just lighter weights and more repetitions. As with the gluteus medius and minimus, training these areas specifically will help protect you against injury in any sport or other physical activity you choose to do.
Not every leg workout should look and feel the same. Not every leg workout should use heavy weights. Not every leg workout should finish making you feel completely wiped out and unable to get up from your chair the next day! Also, I don't want to buy the same leg workout in every series Cathe releases: I already have GS Legs, S&H legs, B&G, Legs & Glutes, why would I pay again foe the leg workout in Xtrain to be exactly the same again?!!!
Then, there's the boredom and lack of motivation factor: we lose motivation when we do the same activity over and over again. Sometimes, changing the focus of how you train is exactly what the brain needs, is exactly what keeps you interested and coming back to workout, and exactly what provides the stimulus needed to produce results in leg strength, endurance and overall conditioning. Cathe is always telling us: change it up, change produces the stimulus for growth.
Wasn't that the whole point of Xtrain?
Clare