Exercising for 30 minutes 3 or more times per week is recommended, however this will vary according to the woman’s previous history of activity/ fitness level.
Cardio-based activities such as walking are very important to keep the blood flowing and should be included in the warm up before training.
Exercises should include all components of fitness, i.e. strength, endurance and flexibility.
Leave out any exercises that don’t feel good, modify and accommodate. As a teacher, focus on what she can do rather than what she can’t. Work at a pace that she can manage and keep up, especially in a group class.