Cardio machines bad for pre-lifting warm up?

We all know that static type stretches held for many seconds at time may decrease the ability of the muscles to produce maximal strength for many minutes afterwards. We also know controlled dynamic stretches imitating part of the sporting movements has minimal adverse effect on exercises or the lifts that are about to take place during our workout. One thing that fails to get talked about and you see it happen day in and day out at every health club is the use of a bike or treadmill at a low pace for a warm-up (pre-lifting/sporting). What's so bad about this your asking? This "action" as a warm-up tends to decrease the functional range of movement of the hip flexors in particular "got this from the great Mel SIff". Unless your counteracting this with some hip flexor stretches or funcional flexability movements you should be cautious about the overuse of cardiovascular machines pre-lifting. If all this dynamic mobility and overuse of cardio machine mumbo jumbo is to much for you then simply use a couple of bodyweight exercises or carry out your training exercises with very light loads on the bar and progressively take it from there. All in all an enhanced warm-up will lead to a better workout!