i have one of those super skinny body types and after 6 months of no activity i still have super skinny legs and arms but have developed just a tad bit of flab on my belly that i want to get rid of
The longer and slower you go the more likely you are to burn fat and not muscle.
You should try lowering the resistance level some and riding for a longer peroid of time. The more resistance you have the more of a chance you have to burn fat and muscle. If you lower the resistance and ride for a longer amount of time you will burn more fat and less muscle. I would ride for min. of 45 minutes to an hour. The lower resistance level should also help with the sore knees, your heart rate will get to where it needs to be riding for this amount of time.
Erm...sorry but that's completely wrong, in fact the opposite is true, lengthly cardio will limit muscle gain or worse still cause muscle atrophy. If you want to get the benifits of cardio without muscle loss look into HIIT.
And remember, muscle burns a hell of a lot of calories so if you want to lose fat then build muscle (your engine)
So why do studies show HIIT burning more fat?
There's only a couple of studies, and the methods and results in detail don't show that infact. The main point was HIIT is more TIME efficient i.e. your burning fat faster, but not necessarily more of it, this will come out later as papers are peer reviewed more.
Also most studies are only measuring this 'initial effect', when the quick gains are made.
Edit: just wanted to add, that weight training is the ultimate HIIT !! doing 20reps on the squat at say 60% max weight versus sprinting is basically the same in terms of physiology. There is an important difference though to do with speed of movement.
If I understand the Tremblay study correctly, the steady state cardio group burned 2X as many calories - while actually exercising - as the HIIT group that they compared them to.
And, once they accounted for those differences in the amount burned during exercise, they found that for every calorie burned while exercising, the HIIT group ended up with more fat loss per calorie expended than the steady state cardio group.
In fact, the HIIT group had a fat loss 9 X greater than the steady state cardio group.
That's why " studies show HIIT burning more fat " IMO.
I wouldn't say " weight training is the ultimate HIIT " - it is simply a form of anaerobic training of varying intensity levels ( i.e moderate to high ) and doesn't follow any sort of strict interval protocol.
you never read this bit
also if you look at the studies by tremblay and tabata it is HIIT versus low ss-cardio not moderate or high ss-cardio.
if they had used high ss-cardio i think you will find the results different.
ss-cardio at a higher level will burn more fat,simply because you are at a higher level for longer.
So, you're saying that if this guy runs " for about 45 min to an hour at a slow pace " this " lengthly cardio will limit muscle gain or worse still cause muscle atrophy ".That 45 minute ' slow ' run may be fuelled by as much as 60% fat and only 40% glycogen, whereas the HIIT might be fulled by as much as 95% glycogen and 5% fat during work intervals and closer to 75 % +/- glycogen during recovery intervals.
Assuming your glycogen stores are topped up in both cases, are you saying if you run at a slow pace for 45 minutes and burn 300 calories and do 30 minutes of HIIT and burn 300 calories, that there is a greater risk your body will break down protein ( i.e amino acids / muscle tissue ) to create glycogen for energy during the 45 run ?
Why is that ? What is it about a slow 45 minute run that greatly increases the liklihood protein will be synthesized to glycogen for energy vs HIIT ?
Well, first of all, as Karky mentioned, the important factor isn't whether glycogen or fat stores get used but rather the calories that get used.
If the HIIT and the 45 minute run use up the same number of calories then do you think they've had the same effect?
HIIT causes EPOC (Excess Post-exercise Oxygen Consumption) which causes your body to burn calories at a higher rate for long after the exercise has finished. The slow 45 minute cardio will do no such thing
also, with such lengthly cardio you risk your cortisol levels increasing and causing muscle atrophy.
Yes...I did.
Why is that needed, if the ss-cardio group was already burning 2X as many calories - while actually exercising - as the HIIT group ? If I recall correctly, the steady state group burned a total of 28,000 calories and the HIIT groups burned a total of 14,000 calories during exercise. The ss-cardio group burned twice the calories as the HIIT group yet the HIIT group had 9 times more fat loss than the ss-cardio group. The issue is the amount of total fat loss derived using one cardio protocol vs another protocol from a ' per calorie expended ' basis.
Are you suggesting it might require the moderate or high ss-cardio to burn 4x, 6x, 8X as many calories as the HIIT group in order to lose the same amount of fat overall than the HIIT group did ?
What would the results be ?
As Karky pointed out, the issue isn't the % of fat burned during exercise, it is the total calorie deficit created both during and post exercise.
When it comes to fat loss, Karky is right, the issue is total calories burned overall...not how much fat ( vs carbs ) is burned as fuel during exercise.
Do you think the OP is still listening to any of us nit-picking at each other?![]()
Oh s**t, I've got a doctors appointment to get to!!!![]()