I hate to sound like a an adversary but I doubt that you can do HIIT for an hour at a time, most HIIT programmes are no more than thirty minutes in duration. Even normal interval training should only last thirty minutes. Recent studies have shown that a thirty minute workout has the same benefits as a 60 minute one if the intensity is great enough.
How is your strength programme structured? Does it consist of only full body and compound movement exercises or are small muscle group isolation exercises included? The more muscles you recruit and activate per exercise the more benefit you will obtain. If you are using weights which allow you to do more than 8 to 10 repetitions per set your weights are too light and not challenging your muscles adequately.
More specific information as to what your workouts consist of will get you more accurate recommendations and advice.
It is called WORK-ing out for a reason.
I said getting fit was simple, I did not say it was easy.
Cardio burns calories, strength work burns fat.
Eat well to lose weight, exercise to get fit
You can not build a six pack using twelve packs
Often when we seek a magic bullet for fitness we end up shooting ourselves in the foot.
"I think calories are little germs in food that all moms are afraid of" Dennis the Menace