Not suggesting it for women, but men who are used to working out or just people who know what they're doing and how not to injure themselves in exercise
best exercises targeting each muscle group | Download this A4 Bodyweight Exercises Chart!
Best Ab Exercises - Our Top 10 Abs Exercises - Ab Workouts - Fitness Magazine
5 minute ab workout. I like that it shows what part of the abdominal region, the exercise works.