Just started a diet and amalgamated a gym?
Answers: There's really no #1 best answer for what workout is proven. It's different for everyone. You really should mix up your workouts anyways, to achieve the best performance from your body.
Check out what you gym have to offer. I usually swap around the treadmills, ellipticals, and bikes, but there's one contrivance at my gym called "the wave" that mimics rollerblading. It's a great gadget, and just kill your legs 5 minutes into the workout.
My gym also offers a foxtrot class that is illustrious energy, that's set to latin and hip hop music. It'll enjoy you sweating in 15 minutes, and the class is 90 minutes long!!
Really, you involve to find what's good for you. Just remember to changeover your workout every 6 weeks or else you'll plateau, your body will seize used to the workouts, and you'll stop seeing results.
Start off near cardio. Treadmill or Elliptical depending on your energy. 45-60mins 3-5 days a week. dance and lots of love making is best i found