Active Low-Carber Forums
Atkins diet and low carb discussion provided free for information only, not as medical advice.
Home Plans Tips Recipes Tools Stories Studies Products
Active Low-Carber Forums
A sugar-free zone

Welcome to the Active Low-Carber Forums.
Support for Atkins diet, Protein Power, Neanderthin (Paleo Diet), CAD/CALP, Dr. Bernstein Diabetes Solution and any other healthy low-carb diet or plan, all are welcome in our lowcarb community. Forget starvation and fad diets -- join the healthy eating crowd! You may register by clicking here, it's free!

Go Back   Active Low-Carber Forums > Main Low-Carb Diets Forums & Support > Exercise Forums: Active Low-Carbers > Beginner/Low Intensity
User Name
Register FAQ Members Calendar Mark Forums Read Search Gallery My P.L.A.N. Survey

Thread Tools Display Modes
  #1   ^
Old Thu, Oct-08-15, 08:17
Evastover's Avatar
Evastover Evastover is offline
New Member
Posts: 10
Plan: #DoingMyOwnThing
Stats: 235/201/135 Female 63"
Progress: 34%
Location: USA
Default What/When to Eat So I'm Not Dead After Zumba?

Hi all!

I do zumba classes (which is moderate-high intensity in my area, lots of jumping and squatting) for 1 hour 5x a week and am ready to fall over afterwards. I felt better after class a couple of weeks ago than I do now. Recently, I was taking a shower at the gym after class when my vision started to go black from the outside inwards (like tunnel vision closing in on it's self, but spotty) and I collapsed onto my knees and and had to keep my head down until it didn't feel so heavy and I could get back up. I get about 80oz. of water per day and take a water bottle to class, but I won't rule out dehydration for that particular incident. I don't count calories and don't starve myself, pretty much just eat when I'm hungry. Is there anything I can do to be less tired after zumba?

I'm perfectly fine *during* the class (except for some heartburn that's probably unrelated), it's only afterwards that I have this issue. 4/5 of the classes are at 6pm, so I'd expect some tiredness, but I'd just like to be able to walk without feeling like I'm going to fall over. The class does involve a warm-up and cool-down, if that's relevant.

Any suggestions?
Reply With Quote
Sponsored Links
  #2   ^
Old Thu, Oct-08-15, 08:52
Nancy LC's Avatar
Nancy LC Nancy LC is offline
Posts: 45,239
Plan: Paleo 99.5%
Stats: 210/170/160 Female 67.5"
Progress: 80%
Location: San Diego, CA

Drinking that much water might be flushing all the electrolytes out of your system. Make sure you're getting plenty of salt. Please read "The Salt Thread" in my signature.
Reply With Quote
  #3   ^
Old Thu, Oct-08-15, 20:43
Nicekitty's Avatar
Nicekitty Nicekitty is offline
Senior Member
Posts: 463
Plan: Banting
Stats: 150/139/132 Female 5'7"
Progress: 61%
Location: PNW

Are you on any medications? any medical conditions? Do you ever test your blood sugars? If that happens again, I would contact your doctor's office or a consulting nurse just to be safe. It reminds me of episodes I had with low blood pressure.

Aside from sticking to a clean low-carb diet, I'm not sure that you can "eat for energy". You'll probably do best if you are in ketosis (as long as you have adapted). I've had some of my best, most energetic days when I've skipped breakfast (intermittent fasting). For instance today I moved 2 tons of flag stone, wheeled 1 yard of river rock, and mixed 6 bags of concrete, after skipping breakfast. I'm tired but not overly so.
Reply With Quote
  #4   ^
Old Fri, Oct-09-15, 09:03
Seejay's Avatar
Seejay Seejay is offline
Senior Member
Posts: 3,025
Plan: Optimal Diet
Stats: 00/00/00 Female 62 inches
Progress: 8%

1 hour, 5x a week. Probably not eating enough for that much sugar-burning exercise. You could be bonking from your body not producing enough glucose .

Mark Sisson has some fun breakdowns of the energy needed to support daily exercise. You might want to read up and then compare your food, your body, and where your movement is.

In the quote below, PB stands for his Primal Blueprint program.

On a PB-style low carb diet, with PB-style low training time, the body makes 200 grams of glycogen each day from fats and protein (and then we figure another 100 or so from your veggies and fruits). That gives you enough glycogen to fuel your brain, cruise through an average day and to be able to do a short hard workout – and then do it again the next day. However, when you train long every day (over an hour), your carb needs will increase. The key is discovering EXACTLY how many additional carb grams you need each day to refuel muscles, but also to keep insulin and fat storage to a minimum. Too few and you won’t recover from day-to-day. Too many and you’ll set yourself up for inflammation and unnecessary weight-gain.

Read more:

A Zumba workout for a female at 200 pounds and 35 years old, would take 800 calories according to a simple calculator found on a Google search.

Since it's moderate-high intensity, say it's 75% sugar-burning and 25% fat burning. That means 600 calories of glucose are needed each day just for the exercise session. That has to be glucose, not coming from your stored fat.

Don't know how much protein, fat, and carb you have, but that might take an extra what, 150 g of protein per day, over and above your usual?

Notice that Sisson assumes you would just add more carbs if carb energy is what you're missing. Personally I would do that too but it wouldn't work if you were zero carb.
Reply With Quote
  #5   ^
Old Fri, Oct-09-15, 16:54
MickiSue MickiSue is offline
Senior Member
Posts: 8,006
Plan: Atkins
Stats: 189/148.6/145 Female 5' 5"
Progress: 92%
Location: Twin Cities, MN

Take a look at the blog of Sami Inkinen (if you google him, you'll find him).

He is an ultra triathlete, and a winning one, and is very low carb. He has a series of graphs on his blog, showing how, once he went low carb, he could exercise longer without hitting a wall, because a greater percentage of his energy was coming from fat, and even the leanest athlete has several days worth of fat to draw on.

I think I would assume, if you are in ketosis, that the issue is dehydration and loss of electrolytes. Try drinking a quart of water before your Zumba class, with enough salt in it that you can taste the salt, but just barely. If you start with hot water and the salt, it'll dissolve more easily, then add cool water to make it taste better.
Reply With Quote

Thread Tools
Display Modes

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

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off

All times are GMT -6. The time now is 04:41.

Copyright © 2000-2018 Active Low-Carber Forums @
Powered by: vBulletin, Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.