1.) Start with a resistance band around your forearms and your forearms flush against the wall
2.) Keeping your elbows parallel to each other and forearms on the wall, slide your arms up the wall
3.) With your elbows locked out at the top, push the bottom of your chest/upper abs against the wall
4.) Lift your arms off the wall as far as you can while keeping your elbows locked out and your chest against the wall
5.) Return your arms to the wall and with slide back down to the start position