David Allen, elitefts team member and owner of NBS Fitness in Cordova, Tennessee, has made a habit of sharing his vast knowledge through video. So much so, in fact, that Allen has given his video series a proper title: NBS Whiteboard Talk.

In his most recent episode of the series, posted earlier this week, Allen discusses back training and what many lifter do wrong when performing pulling exercises.

1. Bending wrists, engaging forearms and biceps.

2. Internally rotating the shoulder.

3. Using too much body english.