No time at all!
The number one excuse for not exercising is lack of time. I just don't have time to workout, work, take care of kids, cook, clean...ugh. I'm already stressed just thinking about getting it all done. Thing is to see change and benefit from exercise you need at minimum 90 minutes a week. For most people, if you sleep 7 hours a night, this is less than 3% of your time. 90 minutes ALL week! For just 90 minutes, you can reduce your risk of diabetes, control blood glucose, reduce LDLs, reduce cortisol, increase endorphins, nevermind lose weight! Just take the step and give it a try.