Just from the looks your carbs are way to low to sustain a long term activity level like this. Your scans show you are burning muscle. This occurs when there is not enough carbs (or fats) to allow protein to be properly absorbed. This leads to the weak feeling you have. Just went through an experience like this. I have upped my carbs to 30% from 20% and it appears to have helped stabilize my muscle. Read up on Nitrogen level in muscle...
Macronutrient content of a hypoenergy diet ... [Int J Sports Med. 1988] - PubMed - NCBI
Weight lifters (WL) attempt to achieve a low body fat while maintaining fat free mass (FFM) and muscle function. Body composition and isometric muscular endurance were tested in 19 experienced male WL at the end of a weight maintenance and exercise routine standardization week. The subjects were assigned to either a control (C), moderate-protein (0.8 g.kg-1.d-1), high-carbohydrate hypoenergy diet (MP/HC), or high-protein (1.6 g.kg-1.d-1), moderate-carbohydrate hypoenergy diet (HP/MC). Both hypoenergy diets provided 75.3 kJ (18 kcal).kg-1.d-1. Apparent nitrogen balance (NBAL) was assessed using nitrogen in the diet, urine, and sweat. Body fat and FFM loss via hydrostatic weighing were not different between the hypoenergy groups. However, lean body mass (LBM) change as assessed by NBAL showed that the MP/HC group had an average negative NBAL of -3.19 g.d-1 while the HP/MC group had a positive NBAL of 4.13 g.d-1. Macronutrient mix did not affect biceps endurance, but quadriceps endurance declined for the HP/MC group during the experimental week. In conclusion, a hypoenergy diet providing twice the RDA for protein was more effective in retaining body protein in WL than a diet with higher carbohydrate but the RDA for protein. However, the lower carbohydrate of this diet contributed to reduced muscular endurance in these athletes.
This medical study has the RDA being met in all the participants. You are not meeting your RDA for your activity level in carbs and maybe fat. As posted above your body has to get the energy from somewhere...it is burning protien..you are catabolic. Less is not always better.


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