Are you struggling to lose weight despite lowering your calories to extreme?

The answer is that you are doing more ‘Harm’ than ‘Good’.
Our body is extremely intelligent and utilises different processes to maintain the balance in order to survive. Thyroid gland plays a major role in regulating the metabolism. Underactive thyroid can lead to weight gain known as Hypothyroidism while overactive thyroid can lead to loss of weight known as Hyperthyroidism(very rare).
Everyone has BMR (basal metabolic rate) which is the minimum amount of calorie expenditure at rest. In another way the minimum amount of calories needed by body in order to run vital functions like respiration, heart pumping, brain etc even if you are not moving in order to survive. You can calculate your BMR by following equation for men and women:
Men: 66 + (6.23 x weight lbs) + (12.7 x height inches) – (6.8 x age )
Women: 655 + (4.35 x weight lbs) + (4.7 x height inches) – (4.7 x age)
So for a woman weighing 75 kgs (165 pound), height 5 feet 4 inches (64 inches) and age 25, the BMR will be 1550 calories.
So if this woman is eating say 800-1000 calories per day in order to lose weight, how will body compensate that 500-700 calories to run the vital functions as described above.
Body still run all the functions by increasing a hormone called cortisol which is known as a stress hormone and is catabolic in nature (means breaking down molecules to smaller units, here breakdown of protein from muscle tissue to amino acids) and it stimulates a process called gluconeogenesis in liver (formation of glucose from other sources) to provide glucose to vital organs of body to function normally. When you are chronically fasting and having low calorie diet, the cortisol remains elevated for long time. Chronically elevated cortisol can lead to muscle loss, make you more insulin resistant, shuts down important functions like digestion, immune system and directly affects thyroid gland by suppressing T3 levels & increase in Rt3 (reverse T3, inactive T3) and leads to store more fat around belly.
Conclusion: optimal-health-for-the-21st-century-82-638
1.Drastic changes in diet are rarely sustainable and aren’t good for your health or your metabolism by affecting thyroid
2. Long sessions of endurance exercise raise cortisol levels and can make it harder to lose body fat. Keep your exercise sessions to an hour or less by increasing the intensity (improves insulin sensitivity)
3. Build muscle which is metabolically active tissue as it burn 3 times more calories than fat
4. Don’t eliminate any macros from your diet (like protein, fat or carbs) as it can lead to nutrient deficiency which in turn can hamper vital functions in body. Eat well balanced nutritious diet.

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