The target heart rate zone is 60-80%
Artificial methods in common use include preventing the sperm from reaching the ovum (using condoms, diaphragms, etc), inhibiting ovulation (using oral contraceptive pills), preventing implantation (using intrauterine devices), killing the sperm (using spermicides)
If your stress levels are not managed, it can put you at an increased risk for developing stress-influenced physical and mental health conditions, such as: Acne. Anxiety disorders