Exercise adherence refers to the strength of an individual’s commitment to performing physical exercise. People with strong exercise adherence continue physical activity despite opportunities and pressures to withdraw. However, many recreational exercisers quit within 6 to 8 weeks of starting. Adherence improves significantly when exercisers have good family support. Far fewer spouses who exercise together drop out compared with married people who exercise on their own. Exercise adherence is also higher among those who set themselves achievable but challenging goals; whose exercise is supervised or monitored by a coach or trainer; and whose exercise is not intensive to start with, but which becomes gradually harder.