- Aug 14, 2018
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Quick question for the room: when your training stalls, how often do you look past the program?
We usually blame volume, intensity, sleep or motivation. Fair enough — those matter. But this week is Malnutrition Awareness Week, so it is worth talking about the quieter possibility: eating too little, or eating a very narrow range of foods, can leave gaps that show up as training problems.
That does not mean every bad week is a vitamin issue. Fatigue, cramps, slow recovery and poor sleep are nonspecific. They can come from under-fueling, stress, illness, hard training, dehydration, thyroid problems and plenty of other causes. Still, a few nutrient gaps are worth knowing about.
Low iron can be part of a picture that includes tiredness, weakness and trouble concentrating. Vitamin B12 deficiency can cause fatigue and weakness, and sometimes numbness or tingling. Vitamin D deficiency in adults can involve bone pain and muscle weakness. Magnesium deficiency can cause fatigue, weakness and muscle contractions or cramps, although cramps alone do not prove it. Severe potassium problems are less about an ordinary low intake and more often tied to prolonged vomiting, diarrhea or certain medicines — and those symptoms deserve medical attention, especially with weakness or palpitations.
Protein belongs in the conversation too. When calories drop and meals get skipped, total protein can fall without anyone noticing. That is not helpful when the goal is to recover, hold onto muscle and keep progressing.
The food-first basics are boring, which is probably why they work: do not let one or two "safe" foods become the whole diet; rotate protein sources; include legumes, leafy greens, whole grains, nuts or seeds, fruit and vegetables as tolerated; use fortified foods when a food group is missing; and pair beans or lentils with vitamin C-rich foods such as peppers, tomatoes or citrus to help with plant-iron absorption. If appetite is tiny, the goal is more nutrition in the food you can actually eat — not forcing a perfect meal plan.
What I'm curious about is the bloodwork side.
**Have any of you had a stall that turned out to be low ferritin, B12, vitamin D or something else? What were the clues — fatigue, cramps, recovery falling apart, sleep going sideways? And once you knew, was the fix mostly food variety, total intake, or clinician-guided treatment?**
No need to share numbers you are not comfortable sharing, and please do not treat anyone's result as a target. The interesting part is the pattern: what made you ask for testing, and what changed afterward?
If symptoms are persistent, getting worse, or include fainting, palpitations, marked weakness, numbness or repeated vomiting/diarrhea, skip the forum experiment and get checked properly. For the rest of us, this week is a good reminder that "eat less and train harder" is not the whole physiology story. Sometimes the missing piece is not effort. It is intake, variety — or a test that finally explains why the engine feels flat.
### Sources behind the symptom descriptions
- NIH Office of Dietary Supplements — Iron: https://ods.od.nih.gov/factsheets/Iron-consumer/
- NIH Office of Dietary Supplements — Vitamin B12: https://ods.od.nih.gov/factsheets/VitaminB12-Consumer/
- NIH Office of Dietary Supplements — Vitamin D: https://ods.od.nih.gov/factsheets/vitamind-consumer/
- NIH Office of Dietary Supplements — Magnesium: https://ods.od.nih.gov/factsheets/magnesium-healthprofessional/
- NIH Office of Dietary Supplements — Potassium: https://ods.od.nih.gov/factsheets/Potassium-Consumer/
We usually blame volume, intensity, sleep or motivation. Fair enough — those matter. But this week is Malnutrition Awareness Week, so it is worth talking about the quieter possibility: eating too little, or eating a very narrow range of foods, can leave gaps that show up as training problems.
That does not mean every bad week is a vitamin issue. Fatigue, cramps, slow recovery and poor sleep are nonspecific. They can come from under-fueling, stress, illness, hard training, dehydration, thyroid problems and plenty of other causes. Still, a few nutrient gaps are worth knowing about.
Low iron can be part of a picture that includes tiredness, weakness and trouble concentrating. Vitamin B12 deficiency can cause fatigue and weakness, and sometimes numbness or tingling. Vitamin D deficiency in adults can involve bone pain and muscle weakness. Magnesium deficiency can cause fatigue, weakness and muscle contractions or cramps, although cramps alone do not prove it. Severe potassium problems are less about an ordinary low intake and more often tied to prolonged vomiting, diarrhea or certain medicines — and those symptoms deserve medical attention, especially with weakness or palpitations.
Protein belongs in the conversation too. When calories drop and meals get skipped, total protein can fall without anyone noticing. That is not helpful when the goal is to recover, hold onto muscle and keep progressing.
The food-first basics are boring, which is probably why they work: do not let one or two "safe" foods become the whole diet; rotate protein sources; include legumes, leafy greens, whole grains, nuts or seeds, fruit and vegetables as tolerated; use fortified foods when a food group is missing; and pair beans or lentils with vitamin C-rich foods such as peppers, tomatoes or citrus to help with plant-iron absorption. If appetite is tiny, the goal is more nutrition in the food you can actually eat — not forcing a perfect meal plan.
What I'm curious about is the bloodwork side.
**Have any of you had a stall that turned out to be low ferritin, B12, vitamin D or something else? What were the clues — fatigue, cramps, recovery falling apart, sleep going sideways? And once you knew, was the fix mostly food variety, total intake, or clinician-guided treatment?**
No need to share numbers you are not comfortable sharing, and please do not treat anyone's result as a target. The interesting part is the pattern: what made you ask for testing, and what changed afterward?
If symptoms are persistent, getting worse, or include fainting, palpitations, marked weakness, numbness or repeated vomiting/diarrhea, skip the forum experiment and get checked properly. For the rest of us, this week is a good reminder that "eat less and train harder" is not the whole physiology story. Sometimes the missing piece is not effort. It is intake, variety — or a test that finally explains why the engine feels flat.
### Sources behind the symptom descriptions
- NIH Office of Dietary Supplements — Iron: https://ods.od.nih.gov/factsheets/Iron-consumer/
- NIH Office of Dietary Supplements — Vitamin B12: https://ods.od.nih.gov/factsheets/VitaminB12-Consumer/
- NIH Office of Dietary Supplements — Vitamin D: https://ods.od.nih.gov/factsheets/vitamind-consumer/
- NIH Office of Dietary Supplements — Magnesium: https://ods.od.nih.gov/factsheets/magnesium-healthprofessional/
- NIH Office of Dietary Supplements — Potassium: https://ods.od.nih.gov/factsheets/Potassium-Consumer/