SiennaInLondon said:Can I just ask -is the ski machine considered resistance or cardio? Because it makes sense that it is cardio but you are pushing and pulling with you arms and legs... Also how comes I burn the same amount on the ski machine and on the treadmill in a certain amount of time even though I am far more knackered on the treadmill?
Two parts to this answer:
1. The calorie readouts on ALL cardio machines are total BS. They overestimate by 20-25% on average. Calorie burn is determined by sex, height, weight, age, resting heart rate etc. There's no way the one body type that the treadmill company used could equate to everybody.
2. You're more knackered on the treadmill because you have to lift your whole body up off the ground and forward a stride everytime. On elliptical machines and ski machines you never have to lift your bodyweight, just push backwards and forward. And you're even more knackered running outdoors because the treadmill propels you along a bit.
Hope this helps

ill try to incorporate it into my next exercising journey 
) I can say without a doubt, though, because I have moderate scoliosis/ alignment issues that if i don't use them 2-3x a week, in between runs, I feel the difference, so in that sense, they definitely work. It is crucial though to use them properly - watching the DVD and practising at home is good. Also helps to have someone watch you do it a few times to get the hang of it.