[header] How to work out longer [title] Set a goal. [step] Before you aim to increase the duration of your workout, you have to know what your end goal is and how you will get there. Set a goal that is: specific, measurable, attainable, realistic, and timely. 
[substeps] For example, set a goal to add two extra minutes to your workout, five days a week. Once that's attained, you can revisit your goal and opt for five extra minutes five days a week.