The best-known member of the genus Atropa is Deadly Nightshade (A. belladonna) - the poisonous plant par excellence in the minds of many.
According to ACE's standards, it is normal for female athletes to have between 14 and 20 percent body fat, for fit women to fall between 21 and 24 percent and for average women to have between 25 and 31 percent body fat.
Lean body mass for most people is between 60 and 90 percent of body weight, but this varies by age and gender, with men and younger people typically having more lean body mass than women and older people. Average body fat for women is between 25 and 31 percent, and average body fat for men is between 18 and 24 percent. The American Council on Exercise gives the following formula: Desired body weight = current lean body weight/(1 - desired body fat percentage in decimal form).