You may want to try eating a snack about an hour before your workout. It should help with the Nausea. As far as a diet goes portion size is the most important part. The fad diets are not healthy. And of course drink lots of water. Do not let yourself get dehydrated. Thanks for posting your workouts. I've been thinking about trying P90X vs joining a gym. Reading your posts is encouraging. Keep up the good work!