From Underweight to Working Out - My Healthy Transition
Another common question I receive via Instagram DM revolves around working out to gain muscle after being underweight. When I was severely underweight and finally began to come to terms with gaining, (however reluctant), I had the mindset that I would gain SOLELY MUSCLE!! HA..
Little did I know muscle cannot be gained without fat... and when I was in such a deficit, my body didn't care where the calories were coming from - I just needed to gain weight. The doctors emphasized to me again and AGAIN that no muscle could be gained when in the caloric deficit I was in. Muscle development requires a minimum amount of body fat - without this, the body remains in starvation mode attempting to maintain its vital internal organs. If any of you have dealt with a similar extreme weight loss, I'm sure you may have also experienced amenorrhea, (loss of menstruation)? This is all related to the fact that body fat percentage is too low, causing the body to essentially put reproduction at its very last priority. A certain level of dietary fat is needed to maintain proper hormonal functioning, the reason for which a period ceases during periods of malnutrition. If the human body is not receiving enough caloric intake for its OWN functioning, there is absolutely no way it could support development of the life of another being.
Forcing exercise while underweight will additionally only enhance the damage being done to your body and metabolism. Based on what doctors have explained to me, I envision the underfed body going into starvation mode... so normal caloric burn slows way down to preserve any calories it does receive. Furthermore, those severely underweight have an increased risk of reduced immunity, bone density loss, vitamin/mineral deficiency, delayed wound healing, and the list goes on. I'm NOT trying to scare anyone into gaining weight, but some of these facts were the ones that convinced me to make life-saving changes.
SO - How long did I wait to begin working out again?? At the beginning of my weight gain journey, I was monitored by several doctors at an outpatient center. After months of convincing me that I couldn't gain weight on a diet of solely raw vegetables and egg whites ESPECIALLY while working out 2 hours a day, I began to stop. I stopped resisting, I stopped being so defiant, and I trusted the process. I finally took the fearful leap to regain my health because I knew I desperately needed to. I ceased any form of intense workouts for about 18 months (1.5 years). The quicker I stopped hiding secret runs and workouts in my room, the quicker I gained the weight I needed. The extent of my exercise included brisk morning walks for no more than 30 minutes.
Was the drastic switch from intense workouts to almost no exercise easy? NO. But it was exactly what I needed. The sooner I stopped forcing workouts because of my distorted mindset, the sooner I regained the body fat/tissue I needed. Only once reaching a safe level of body fat, the doctors mentioned I could begin moderate workouts a few days a week, but nothing extreme. Fortunately, after gaining the weight I needed, my unhealthy mindset changed for the better as well. I slowly began increasing my workouts and stepped away from solely cardio to burn off what I'd consumed. Slowly but surely I found my passion for weightlifting with a healthier mindset. No longer am I killing myself on the treadmill in fear of a dreaded caloric excess. No longer do I fear seeing my body change and increase in weight as I develop muscle mass. It has become a fun and exciting challenge for me that I never would have found if I didn't take a necessary extended break from the intense exercise.
If this position sounds at all familiar, I recommend a few key things.
1. Be PATIENT. You cannot simply eat 4,000 cals in a day and gain all the weight you need to begin exercising again. If you are truly underweight, it is important to have patience with the caloric increase and implement a gradual plan to achieve your final goal with the least amount of gastrointestinal discomfort.
2. Consult a trained PROFESSIONAL. Whether it be a registered dietitian or medical professional, those that know more about properly increasing caloric intake can help tremendously. They put me on a perfect meal plan that I would have had no idea how to design myself at age 19. Don't be afraid to reach out for help or at the least, get more educated on the topic. Your body is begging you to!
3. Resume Exercise when WEIGHT RESTORED. I know firsthand that it can be absolutely excruciating to have to avoid exercise, because it can be so enjoyable and stress-relieving. But when your health is at stake and exercise is being FORCED because of a disordered mindset, it is crucial you take a break - for as long as you need. If your goal is to gain muscle, this will only occur once your body has its minimal level of necessary fat.
4. Listen to your PERIOD. It may make a lot of sense that the menstrual cycle is mother nature's indicator of proper hormonal health. This indirectly shows that fat levels are back where they need to be. I've heard of many situations where a menstrual cycle prematurely returns, but generally it is the greatest indication that healthy/moderate exercise may continue.
I hope that this provides some insight to you all on the topic! I get the question about my specific experience with this very frequently and the biggest thing I can emphasize is to wait. Relax. It is necessary that you enter a healthy weight range before attempting to workout and/or gain muscle. Pushing exercise while below a healthy body fat percentage will only dig you into a deeper hole. You will be so grateful you were patient when exercise feels healthy and fun again.
As always, I'm available via DM for questions and will respond to all comments on this post! Thank you so much for reading💓
XOXO - Colleen

Gurl yes yes yes. These are so KEY, you know how much I relate to you and look up to you! I love these tips and getting the help needed from a professional is so important and learning to listen to your body. I did the same thing and it’s changed my life for the better I LOVE watching myself grow now and I couldn’t be happier eating all the foods and being part of your split and waiting for all the gains ❤️
ReplyDeleteThank you SO much Kayla:) It has absolutely turned my life around as well! I'm so grateful our mindsets have changed... I'm just as happy to have you a part of it!! THANK YOU LOVE
DeleteI love that you made this post about this topic especially because I'm super underweight and debating whether exercise is okay to do or not. Although I have a couple of questions because I'm alittle confused, so if you're very underweight , you should gain weight first before exercising because there's no fat to support your exercise right?
ReplyDeleteWhat damage did your doctor mention you are doing to your body when very underweight and exercising?
I ask these questions because I'm a long distance runner and LOVE running but I'm also very underweight and it's hard for me to just completely stop you know? It's something I love doing. Since I know its possible to gain weight while exercising, would it still be a good idea in my case to continue running even while underweight but eating enough to support it+gain the weight?
Hi Valerie!! I'm so happy you reached out because I really find this an important topic. I understand you're passionate about running - which is absolutely AWESOME, but I would definitely suggest gaining weight before continuing intense training. If there's any way you could shorten the runs while increasing calories, that could be a possible solution as long as you're increasing weight! I was in such a deficit that it was foolish to keep exercising before I put more weight on.
DeleteThe doctors mentioned several health issues, first being obviously a loss of my normal cycle. An irregular menstrual cycle can lead to issues with hormonal regulation and bone density/strength. Hormones control SO MUCH within the body, and their function is severely disturbed without enough fat. Continued exercise can also be very hard on the joints. Fat helps cushion bones/ligaments/tendons and these are all at risk with a lower body fat percentage.
I don't mean to scare you, I'm just relaying the messages that doctors explained to me! I wish all the best for you girl, and I hope this was the least bit helpful! I totally understand it's hard to stop completely, so maybe you can find a nice balance:)
Thanks so much for reading my input,
Colleen
Hi Colleen! I really appreciate you making this, I read this at just the perfect time of my recovery. I have finally decided to give up everything and gain the weight that I need to be weight restored. I had the same mindset of only wanting muscle but after reading your blog reminded me that I need way more than just muscle, I need a higher fat percentage. My biggest fear is gaining weight in my midsection while not doing exercises. Did you ever have to/how did you deal with gaining weight in your stomach? did you have the urge to do ab exercises while gaining weight?
ReplyDeleteWOW. Girl you are so strong. Your story is truly incredible and inspiring. You are helping so many young women by sharing your journey. ��
ReplyDeleteThis means the world to me Dawn, thank you so much!!
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ReplyDeleteThis post was a long time ago so I hope you see this comment... I think I'm in a similar situation as you were...not underweight from an eating disorder but definitely underweight and I want to gain back muscle, not just fat. I love working out too, because then I feel like the weight I gain is "productive" weight even though I also know that right now any weight is necessary...I just want to be stronger and feel like it needs to be muscle for that to happen.
ReplyDeleteIs that true or would gaining fat also increase some strength?
Another question—my weight has fluctuated a lot over the past 2 years (I lot my period about 2 years ago) and despite the times when I was at a healthier weight my period has never come back. How long did it take for yours to return? And should you keep gaining weight until it returns, or could it take some time once at a healthy weight for it to come back?
I really hope you see this and can respond. Thanks so much for sharing your story, Colleen.
Hey! First I would like to thank you so much for this blog. It was the only thing I found helpful. I would really love it if you could give me an advice. Well, I wasn't underweight at first. I had a normal BMI. Then I started to work out and I loved it but I stopped eating thinking I could lose all the weight. (Now, that I think about it I feel so dumb for taking it too far). So I started to lose the weight incredibly fast. Sadly, I didn't notice the damage I had done until it I started to get weak and dizzy. My blood pressure became 90/50. My BMI became 17.3. I bacame underweight and honestly, I couldn't get over the shock. You adressed a lot of things for me and thank you for that. I have a few questions for you. I would really appreciate it if you could answer them. After I gain the weight and my BMI becomes in the normal range, I am afraid when I start working out, I will lose the weight again and become underweight. Or did I become underweight because I didn't eat right and exercised excessively? I did lots of cardio and HIIT work outs. I loved doing them. Does it mean I will have to stop them? I don't want to start weight lifting. Is there a way I could gain the weight, eat right, do the cardio and HIIT and be in the normal weight range? It's been very stressful for me to think about it. I am hoping you could clear some stuff for me.
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