Intense cardio = sleepy? - VeggieBoards
Forum Jump: 
Thread Tools
#1 Old 04-03-2009, 05:31 PM
Veggie Regular
Cassiel's Avatar
Join Date: May 2003
Posts: 609
I've been doing some pretty intense cardio on the eliptical lately just because I can - I'm impressed by how high I can get my heart rate without feeling like I'm doing much. In fact, according to two different heart rate monitors (I was suspicious so I tested this - it seemed a little extreme) I can easily get my HR up to 180. I'm 28, so that's a pretty high percentage of maximum. Not that I would mind pushing up my VO2max. It just amazes me how long I can stay in the high 160's to 180 without wearing out. I did 7.25 miles today with an average HR of 172.

What this results in, however, that I have never experienced post-workout before is a high level of sleepiness. I don't mean fatigue - I always get a pleasant weariness whether I've run, swum or cycled. I mean actual sleepiness. I was sitting in my car because I was early to an engagement this afternoon and I fell asleep (thankfully I woke up in time).

Any ideas what this is about? Am I suffering hypoxia or something? Is the high cardio intensity drawing blood away from my brain and killing brain cells? I don't feel any dumber...not yet anyway...
Cassiel is offline  
Sponsored Links
#2 Old 04-11-2009, 08:55 PM
Veggie Regular
beepbeeplove's Avatar
Join Date: Aug 2008
Posts: 405
I used to always feel sleepy after intense cardio I don't think it would be killing brain cells, high intensity cardio improves neuron function/lifespan.

I think with heart rates it varies from person to person what is intense. What I would call moderate effort gets my heart rate up to about 185, but it doesn't feel difficult. You must have a heart that is strong enough to beat quickly, that sounds like a good thing
beepbeeplove is offline  
#3 Old 04-16-2009, 09:00 PM
elektra513's Avatar
Join Date: May 2006
Posts: 12
IMO you're not getting enough calories to support your exercise immediately after. Maybe you should eat something substantial afterwards?
elektra513 is offline  
Sponsored Links
#4 Old 04-17-2009, 09:11 AM
desertowl's Avatar
Join Date: Apr 2009
Posts: 2
I always get an immediate boost of energy after cardio.
desertowl is offline  
#5 Old 04-17-2009, 12:05 PM
Veggie Regular
lobsteriffic's Avatar
Join Date: Feb 2008
Posts: 486
Immediately after intense cardio I get that exercise boost. But a few hours later I get sleepy too. I just chalk it up to being exhausted from a really good workout.

That being said, make sure you are getting plenty of sleep at night and eating properly to support that level of activity.
lobsteriffic is offline  
#6 Old 04-17-2009, 06:23 PM
Jalden's Avatar
Join Date: Apr 2009
Posts: 70
If it's not that your just plain wore out it could be low blood sugar. You burned it all up .
Jalden is offline  
#7 Old 04-18-2009, 07:59 PM
Veggie Regular
Cassiel's Avatar
Join Date: May 2003
Posts: 609
See, the funny thing is that all those things - blood sugar, caloric intake, etc - I shoudl have a handle on by now. I'm an endurance runner who has done a number of marathons and a lot of smaller races. I just don't remembering being so sleepy after doing an intense workout before. I like doing endurance sports because I'm better at endurance than speed, so I tend not to go for high intensity, but rather long duration. This high intensity business is relatively new.
Cassiel is offline  
#8 Old 04-23-2009, 06:30 AM
Aynsl156's Avatar
Join Date: Apr 2009
Posts: 7
I always chalk it up to electrolyte depletion, and make sure to eat something high in magnesium and potassium after a long run.
Aynsl156 is offline  
#9 Old 04-23-2009, 03:02 PM
Veggie Regular
Masja's Avatar
Join Date: Oct 2007
Posts: 808
I get this way too...then again I don't work out intensely, but at home when I'm working out on my stationary bike you will find me yawning throughout, even though I keep a pretty good pace. Also afterwards, I'm exhausted and soooo sleepy. The only thing I found helps is to drink a ton of water and try to go a little longer, as I find I'm most tired if I do less than 20 minutes or so.
Masja is offline  

Quick Reply

Register Now

In order to be able to post messages on the VeggieBoards forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:


Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page

Forum Jump: 

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off