Cardio (Day or Night)

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Running is probably more enjoyable in the morning or late afternoon when it's cooler. Indoor cardio can be done any time of day or night.

I always do cardio (run or DVD at home) first thing in the morning in a fasted state. For me it helps shed more BF than afternoon/evening cardio as I burn my existing energy stores, rather than burning calories from the food I've eaten during the day. The calorie burn also continues throughout the day. It's also nice knowing that my workout is done for the day so I can go home and relax after work

I would battle with motivation to get up early enough to train before work, especially as we are now entering winter and a particularly cold spell, so afternoon / early evening gets my vote.

Personal preference.

I prefer to go for a longer cycle ride (fasted) in the morning on the way into work.

This is so I have more time in the evening to do other things (like collapsing onto the bed or a chair after doing 50 miles on the bike that day, as rest and recovery are important as well).
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I have read a few articles; but have seen very few personal testimonials. Which works better: HIIT Cardio in Morning or Night, or does it not matter at all. Any personal experiences would be good

I have yet to see conclusive evidence that it makes a reasonable difference where you position it, if you're only referring to fat loss effects.

Personal preference should be one major factor, and within that/aside from that an important consideration would be the impact HIIT has on recovery and performance for the remaining days in the program, assuming the client is also resistance training. So the placement of it might have more to do with "where can I put this so I can still squat effectively" vs a hypothetical fat loss advantage.

Personal preference. I exercise in the morning because I'm too lazy to do it when I get off work in the afternoons.

It's personal preference. I used to come home from work and workout at 11-12 midnight and then just fall right to sleep after my shower. Some people a workout hypes them up so they would rather workout in the morning rather than at night. It's all about what you wanna do, and what you feel is going to give you a better workout! (:

What works best is when you plan a time that you are more likely to want to do it.

I have read a few articles; but have seen very few personal testimonials. Which works better: HIIT Cardio in Morning or Night, or does it not matter at all. Any personal experiences would be good

I have yet to see conclusive evidence that it makes a reasonable difference where you position it, if you're only referring to fat loss effects.

Personal preference should be one major factor, and within that/aside from that an important consideration would be the impact HIIT has on recovery and performance for the remaining days in the program, assuming the client is also resistance training. So the placement of it might have more to do with "where can I put this so I can still squat effectively" vs a hypothetical fat loss advantage.

As stated above, it's a personal preference and you should factor in your entire training goals, energy levels etc. Positioning cardio or any other training when you don't have energy or when it will negatively impact future training is counter-poductive. The best time for me may not be the best time for you, so basing your training time's on some else's results doesn't help a whole lot.

Also, as stated above, for those who swear by "fasted" cardio or placing cardio at a specific time of the day for optimal results, there is no evidence of training or cardio timing when it comes to fat loss or strength gains - train when you can fit it and when you can give the intensity required to do so.

Afternoon / evening for me