This is so confusing. I’m 5 feet tall and 120 pounds (age 42). Everytime I calcuate my TDEE with light activity (I work out 3 times a week and stay active on the weekends just doing stuff) I come up with 1317. That’s pretty low. And if I try to make a calorie deficit of 20 percent, that leaves me with only eating barely 1,000 calories a day. That’s hardly eating. And I keep hearing everywhere not to eat less than your TDEE to lose weight. I’m totally baffled. Here’s my situation. I was eating 1200 calories a day and lost 40 pounds total. I did most of my exercise through 40 minutes to 1 hour on an exercise bike 4-5 days a week. I know how to keep a diary and track everything I eat (and I eat healthy…not junk). I am now trying to lose the last 10 pounds to get me to the 110 range. I have not been able to do it at all over the past year. The biking for 30 minutes 3-4 days a week wasn’t working (my schedule too busy to do more than that now). I’ve been doing HIIT for 25-30 minutes the last 2 months…no weight loss either. I’ve checked and rechecked diet. I’ve tried eating more than 1200 after learning to not eat lower than my TDEE. No response. It’s been a year of this battle. I’m totally confused and eating 1000 calories a day doesn’t seem healthy at all. Help!!!
The second theory is similar and is known as "evolutionary neuroandrogenic (ENA) theory of male aggression".   Testosterone and other androgens have evolved to masculinize a brain in order to be competitive even to the point of risking harm to the person and others. By doing so, individuals with masculinized brains as a result of pre-natal and adult life testosterone and androgens enhance their resource acquiring abilities in order to survive, attract and copulate with mates as much as possible.  The masculinization of the brain is not just mediated by testosterone levels at the adult stage, but also testosterone exposure in the womb as a fetus. Higher pre-natal testosterone indicated by a low digit ratio as well as adult testosterone levels increased risk of fouls or aggression among male players in a soccer game.  Studies have also found higher pre-natal testosterone or lower digit ratio to be correlated with higher aggression in males.