Yeah lol. Went to bed at 9pm on both Saturday and Sunday, still couldn't "repay" the debt I owe.

For ladies I always believe that cardio + weights is a good combination

Yeah depends on individual liking. Personally enjoy both cardio and weights, it's more fun to have a mix of both

Trying jogging because you're looking into losing weight? What's your weight at the moment?

Can jog at 5.5 speed ah? I find it slow, that's my rest speed.

If it's to lose weight via cardio, HIIT workout is more effective. But if you still prefer treadmill then you should make it interval instead. For example, jog at a higher rate of say, 9kmph for 3min and then slow it down to 6kmph for a slow jog or brisk walk for a min or so and then hike it up again back to speed 9. Doing this continuously will allow your heart rate to go up. It's more effective than walking steadily/ same speed at 5.5kmph.

If you're 110kg, I don't encourage you to run so much as you might feel pain on your knees with constant running. Go light on treadmill such as brisk walking.

Max heart rate? Not the most accurate but try this: http://www.digifit.com/heartratezones/maximum-heart-rate.asp

It's different for everyone.

Yeah you can do interval with brisk walking instead of jogging. Go light but with a certain intensity to bring your heart rate up.

You should measure through ideal body fat % instead of weight. This chart may be a good guide http://www.builtlean.com/2010/08/03/ideal-...rcentage-chart/

Honestly in my opinion, 6 months for 16.7kg is good.