which type of cardio?

[johnny123]

for fat loss:

for example

20-25 min HIIT training

or

30-45 min brisk incline walking on treadmill

any opinions on which is more efficient?

[IceRgrrl]

Do some of both... :)

[jell999]

Both are very effective.

Instead of brisk walking on the tread though, do a slow jog.
That will be much more effective.

Maybe alternate the two...

[IceRgrrl]

..or ramp up the incline on the treadmill so that you're working harder than you would at a flat walk...

[Orange357]

i like a heavy bag