I follow a paleo-style diet and eat 3 big meals a day with occasional snacking on fruits or nuts. In addition, I exercise both cardio and weight-lifting 5 days a week. Ever since getting on paleo, my body fat levels have fluctuated between 8-12%. Anytime I drop below about 10%, I experience a lack of energy and often get drowsy throughout the day. How common is this lack of energy and drowsiness for people with low body fat percentages, and what do they do to avoid it?
Additional Details:
Measurements
I measure my body fat with calipers and the 7 skin fold measurements. I know that calipers typically underestimate body fat, so I add 3-4% to my results.
Diet
I typically eat around 3000-3500 calories per day. Although I do not calorie count regularly, so my numbers may vary from meal to meal and day to day.
Breakfast: 500-1000 calories.
Lunch: 500-1000 calories.
Dinner: 1000-1500 calories.
Snacks (usually 2x daily): 300-500 calories.