HIIT in the morning (and a few more HIIT questions)

I read that it is best to do HIIT in the morning on an empty stomach (having just a glass of water first) and then eating within 15 minutes after your workout... something about since you haven't eaten breakfast yet, your body will be burning more stored fat calories than if you were to work out later in the day. Additionally, I would assume that this working out in the a.m. also jump-starts your metabolism for the day, which is good. However, schedule-wise it usually isn't possible for me to work out in the morning. Am I cancelling out my good efforts by doing HIIT in the evenings? Also, since I can't devote the full amount of time for working out in the morning, should I add a short (10-15 minute) jog in the morning to get that same jump-start effect, in addition to doing my regular evening workout? Thanks.

Oh, one last question: I'm just beginning to incorporate HIIT into my workouts again (haven't really done interval training since high school, but I remember how great it felt so i'm trying to get back into it). So, how often do you do shorter High Intensity Interval workouts as opposed to long, lower intensity workouts? Should I alternate every-other day? And on which days should I add-on my weight training/conditioning... on the HIIT days or the lower-intensity days?

I think you'll find most eat before HIIT. It's LISS that people do on an empty stomach.

Depends on your recovery rate. Some days I can do HIIT and lift. Other days I have trouble climbing the stairs. If you're eating enough and feel rested then you can do both the same day. But be careful to not burn out and over train.

I guess time of day may affect HIIT workouts, but in my world, just getting to the gym and cranking one out is an accomplishment, so I don't worry about it.

I usually have something light to eat about 45 minutes before I work out.  I find I can go harder and stronger if I have some fuel in me.  It hasn't affected my weight-loss negatively.

I do HIIT 3 days a week in conjunction with my lifting days.   I do my long slow cardio on the other days.

thanks for the input.

zeke, what is LISS? I learned of HIIT through this site, but I've never heard of LISS. Or maybe I have, but am not familiar with the abbreviation.

Low
Intensity
Steady
State

I think it's that or something similar. It's basically the opposite of HIIT. You need much more patience then me for LISS.

I also read in Oxygen last year (in more than one issue) that it's better to workout on an empty stomach first thing in the morning. I did HIIT in the morning when I could, without eating, and I saw results fast. Took a break over the summer and starting back at it again although now I live further from the gym and it's difficult to ge there in the morning. I notice a difference in a slower weight loss.

You know it is funny; this subject has been debated for about ten years! There are studies that show both results. I workout out on an empty stomach( i also work out at 5am not much time to eat something then!). My wife has to eat an apple or something or her blood sugar hits rock bottom. And for God sake stop listening to what they say in magazines!

According to the new england journal of medicine, if you work out on an empty stomach you will burn maybe 3-5% more fat. Iver the long haul it will add up, but if you have to eat something to keep your energy up then do it. You will still be burning fat, Right!

Yeah, I guess you can't always believe people who conduct studies then discuss the results in magazines. Who would do such a thing. I mean, doctors, nutritionists and dietitians conduct the studies...but no...that's no accurate.