Hi Gabriella. You're putting the work in so that's great to hear. I think the best thing you can do is mix it up! Do some all cardio (like StraightUp Spin), make sure you're getting total body strength in at least twice a week (like with a Spin Sculpt, Boot Camp, Body Sculpt, etc) and then maybe add a mindbody class (like a yoga or pilates) for one. And, the bottom line is the more minutes you put in, the more you burn so don't shy away from the full hour workouts. You can do it! PS- I'm tall too and my metabolism is slowing down every year, so I have to work harder to burn what I used to. Such is life!