The best thing about this exercise is that you can do it ANYWHERE! Outside of your truck, like it’s shown in the video below. In your truck, inclined against your bed. Or at home, against a counter top or your sofa! They look easy, but they can catch up to you quickly!
Here’s what I would recommend: 3-4 sets of 15-20 reps with a 1-2 minute break between each set. As you get stronger, you can progress this by increasing how many reps you do each set or by decreasing the amount of rest you have between each set!