Getting you to doing 100, 150, 200 or 250 sit ups in a row — that is what the Sit Ups fitness app is all about.Think of the Sit Ups app as your personal fitness trainer that is going to help you build up the strength to complete those 100, 150, 200 or 250 continuous sit ups within a short few days or weeks, depending on your level of fitness.Just like a real personal fitness trainer, the Sit Ups app adjusts the exercise regimen based on your feedback how taxing you think the individual exercises are. That way, you can continue towards your fitness goal at your very own pace.Tags: sit ups, situps, crunches, curlups, exercises, fitness, workout