If losing weight is your priority to you, then its time to start working those muscles with some resistance while it's your body weight, dumbbells / barbells or Kettlebells.
Because contrary to popular belief getting on those CV machines like the treadmill or cross trainer for 40 minutes and getting off dripping with sweat, is not best, fastest or let's be honest, most exciting way to lose weight.
You need to do some kind of resistance training and do not worry if you're a female, it does not mean you'll get big muscles like the men in your gym. Women have different genetics and much lower levels of testosterone levels, this means you will just end up with a slim toned figure.
Now you're probably thinking why would doing resistance training make me lose more weight than running, using the cross trainer or any other type of CV for that matter. You might find you do not even sweat as much doing weights, but here's the big secret; it's not about how many calories you burn in the gym, its how many you burn out of it!
It might sound crazy, but that's what it's all about because unfortunately at best, most of us will exercise 3 to 5 hours a week some people might get up to 8-10 hours, but that's not much in a 168 hour week. Obviously we can not exercise that much or you might not think you can, but after doing exercise such as lifting weights or doing some kettlebell training, our muscles need to repair and regenerate. This takes energy and time, which can speed up metabolism for up to 48 hours, that basically means after lifting weights or using Kettlebells for one hour or less your body could be burning fat for up to 48 hours after, sounds pretty good to right.
For the best results you should be aiming to do compound movements (this means exercises that work multiple joints and muscles at one time) like squats, lunges, pull ups, kettlebell swings, dips & bench presses because the more muscles you work at once, the more calories you can burn in a workout.
So there you have it, if you really want to lose weight fast and tone you're muscles at the same time. Either start doing some body weight exercises such as lunges and squats or grab some dumbbells / Kettlebells and turn yourself into a 24 hour fat burning machine.