Well, this is just my personal take on things mind you, but ' comfort ' is way down on my list of concerns when trying to get as hard a cardio workout as I can under my belt. If anything, during most of my HIIT workouts, ' comfort ' is the not even on the radar - in fact, I feel like I'm dying the entire time of my HIIT sessions !

In other words, if I expect to train hard, I expect to be ' uncomfortable ' - and that's under a best case scenario - but that's just me.
As for ' numbness ', i assume it's your butt that gets numb ?
That's really odd. "
Off balance "......... in what way ?
If you have toe traps on the bike ( did you have toe traps ? ) and you hold fast of the bike handles you should be able to go 100% standing up and leaning forward without any trouble whatsoever IMO. Without toe traps - it's close to impossible to go flat out though. Not only have I done standing up and going 100% on bikes for over 20+ years, almost every kid I've seen doing bike training for hockey can do it too.
On a normal bike outdoors I've had no problems doing this, I tried it the other night on one of the Lifecycle bikes and felt off balance, and couldnt go as fast or as hard as when I was pedaling from a seated position. Its hard to describe, but I will try again and see how it works.
I don't see why you can't.
In fact, Alywn Cosgrove - co-author of ' new Rules of Lifitng - has a HIIT protocol for fat loss in which he claims HIIT can easily be done
after weight training if you so choose.
And don't forget, when you combine games and high tempo practices, hockey players can do HIIT cardio 6 days a week for a period of 6 months or more.
Why ?
Again, going back to Alywn, his 16 week fat loss program calls for his last 8 weeks to be 4 weeks of HIIT at HIIT sessions 4X a week and wrapping up with the last 4 weeks of HIIT at HIIT sessions 5X a week. So, in the short term at least, and assuming you're fueling properly, consecutive days of HIIT shouldn't be a significant issue IMO. Now if you wanted to plan a cardio schedule for the next 20 years, I'd probably mix up HIIT with some other cardio - something like HIIT 2 - 3X a week and some steady state cardio thrown in on other days.
I had read the do HIIT on non consecutive days in a number of articles I read on TNation. More specifically here:
TESTOSTERONE NATION - Shredded at Last
On the other hand, he contradicts himself later in the article when he talks about doing HIIT 5x a week.
If you can do 30 - 45 of steady state cardio and HIIT cardio as you do - physically - you can definitely do / finish a 10k IMO.
My sense is that you just don't ' think ' you can do it.....that's the difference
Don't sell yourself short jokerswild....you're working hard and obviously have a lot of commitment and discipline to train...you could do a 10k.
If you keep up your cardio ( and perhaps go a bit harder ), there is no reason your couldn't do a 10k as of May1 IMO.
Thanks! I just havent been able to run for any sustained period of time yet. I have noticed my lung capacity improving from not smoking as the weeks go by, but Im not sure if I am there yet. As the weather gets warmer, I will go and hit the high school track in the neighborhood and see if I can run a mile or half mile and take it from there.
Sounds about right.
Keep it up jokerswild....and remember
TRAIN HARD !