Announcement

Collapse
No announcement yet.

Does under-eating hurt weight/fat loss?

Collapse
X
  • Filter
  • Time
  • Show
Clear All
new posts

  • Does under-eating hurt weight/fat loss?

    Some background: I've done P90X 4 times total, none of them following PB. Each time I lost a lot of fat/inches in month 1. I followed their nutrition plan (low carb overall) and always enjoyed success.

    Since switching to PB though, I notice I eat less. There's been a few times I've spot checked my calories and been in the 1600-1800. The nutrition guide for P90X suggest 2400.

    So...is it possible to under eat and not lose weight/fat? I've always questioned the "starvation mode" theory that they propose, but at the same time, I would seem to lose steadily at 2000-24000 cals/day on their plan.

    Just wanting some input on thoughts from other people.

  • #2
    Dramatic under-eating can hinder weight loss, but I'm not sure you are there at such a mild gap. Hunger can also come on with a vengance after being primal for a little while.
    Lifting Journal

    Comment


    • #3
      I just eat coconut oil of a spoon to make sure I get enough calories in daily. My food itself sees me eating 1700-1800 daily, but with extra CO I get in at 2200.

      Comment


      • #4
        The calorie guides are not the Truth, it's an estimate. For one, there is a significant difference depending on how your basal metabolic rate is estimated. The older equations round up, and come up with roughly 10-15% higher BMR than comes up as an average in more recent experiments. Mifflin's equation (spelling) gives the lowest BMI. Watch your body, and if you get the results you want by simply eating when hungry and stopping when full, ignore the estimates.
        My Journal: http://www.marksdailyapple.com/forum/thread57916.html
        When I let go of what I am, I become what I might be.

        Comment


        • #5
          Eat whatever you want of Primal Blueprint foods for a month or two. If you are getting fat(or not losing), cut a few things out. If you normally put olive oil on your salad, don't. If you normally eat 10 pieces of bacon a day--eat 5. You get the idea. Counting calories is for suckers--I know I did it for a long time!

          Comment


          • #6
            If you're doing P90X, I'd also recommend not to go too low carb. Just focus on getting good primal carbs from things like sweet potatoes.
            http://www.facebook.com/daemonized

            Comment


            • #7
              I think it's actually good to keep your body guessing so embrace those days that you eat like a bird AND the days that you're in total feast mode.

              Comment


              • #8
                Originally posted by Kenzington View Post
                I think it's actually good to keep your body guessing so embrace those days that you eat like a bird AND the days that you're in total feast mode.
                Yes!!!!

                Comment


                • #9
                  Originally posted by moderngrok View Post
                  So...is it possible to under eat and not lose weight/fat? I've always questioned the "starvation mode" theory that they propose, but at the same time, I would seem to lose steadily at 2000-24000 cals/day on their plan.
                  I for one have personally found extreme caloric restriction does not give me anywhere near the weight loss one would expect based solely on the numbers. I don't have good explanations as to why, but I spent quite some time between 1200-1400 calories a day with a BMR of 2200-2500 and exercise +3x weekly, and felt like crap doing so.

                  I don't believe it's possible to undereat to the point to actually halt weight/fat loss entirely, merely slow it considerably.

                  Comment


                  • #10
                    The other problem with significant caloric restriction is that it often leads to loss of muscle mass as well. If the goal is to lose fat while retaining muscle, mild to moderate caloric restriction coupled with weight training is an effective combination.

                    Comment


                    • #11
                      i find low fat slows my weight loss ...
                      started at 310 July 23rd 2011 ... workin and workin!

                      my journal - http://www.marksdailyapple.com/forum/thread34980.html



                      Comment


                      • #12
                        Wow, thanks everyone for the feedback!

                        I've been a bit concerned about being a bit too low carb (I think most days I'm under 60g, rarely hit 80g, and only once did I go over 100g) while doing P90X. At the same time, I know I need to increase fat quite a bit to keep carbs in check and get enough calories. I also have PT 3x a week which is a decent workout (1 hour of work with 15 minute warm up and then low resistance focusing on strengthening the shoulders, but still sweat inducing).

                        My biggest problem is, I'm not hungry. I usually eat a 600-700 calorie breakfast, I aim for 500 calories at lunch, and then get another 600 or more at supper. I've thought about adding in an afternoon snack, but I'm just not usually hungry.

                        But I do wake up fairly hungry, I just exercise on an empty stomach.

                        I'm taking inches/body fat this weekend, and then again in 2 weeks. If no progress is made between all the measurements I've taken, I'll probably increase calories first (more fat, slightly more carb) and see where that leads as well.

                        But the weird thing is, I'm rarely hungry.

                        Comment


                        • #13
                          Moderngrok, I had been eating at about your caloric level for a long time, and I got very used to it. I don't know your height, weight and age, but for me at 42 years old, 5'9" and 155 pounds, and pretty active, it seemed to keep me at a maintenance. Recently, I bumped it up to 2300 calories per day, but I carb cycle, basically high carb on workout days, low carb on rest days, but keep calories and protein constant. Seems to have really jump started my metabolism, and I feel better overall.

                          I will say that I was not hungry to eat all that food, but now I am adjusted to it just like I did when I was eating less.

                          I like to track calories and macros to experiment with how my body responds, so don't be afraid to do the same. You really won't know what is working until you keep track of your body weight, measurements and food intake.

                          Comment


                          • #14
                            Hey moderngrok,

                            I would say, yes, eating well below maintenance levels (which will increase further when doing a regular and intense workout program like P90x) will slow down your weight gain progress and almost certainly cause muscle loss as well. When you're eating well below maintenance, adaptive stress hormones like cortisol and adrenaline to help meet the demands you're putting on your body when insufficient food is coming in to meet your energy requirements. You sound like you're quite active between P90x, physical therapy, so I would make sure to be taking in a decent amount of food to account for these things. Otherwise, over time your thyroid hormone production and metabolism will drop, slowing the fat loss you want.

                            As far as you not being hungry after all that activity, that's interesting. Are you by chance slugging water all day or anything similar?
                            Salube Up! - SalubriousU

                            Comment


                            • #15
                              Originally posted by Fury View Post
                              I don't believe it's possible to undereat to the point to actually halt weight/fat loss entirely, merely slow it considerably.
                              I'm going to have to disagree with this. Crash dieters experience exactly this happening. They take in extremely low amounts of food, which they have to keep decreasing as the weight loss slows. Then they hit a point where they stop losing weight completely, and sometimes even gain weight on very low caloric intakes due to sky-high cortisol levels. Then, facing failure and no further progress (and being reallly hungry!) they start eating a ton of food and gain back all the weight they lost plus more, since they thrashed their metabolisms in the process. It's a sad story that happens to way too many people :/
                              Salube Up! - SalubriousU

                              Comment

                              Working...
                              X