Scale Weight Rod

Scale Weight Rod
A physics question about a workout.?

According to my bathroom scale, I weigh 221 lbs. On my bowflex, the resistance I use for pull downs is 260 lbs. That means I am pulling more than my own weight downward. Why do my pull downs then not become chin ups? Is it something about the way the flexing rods generate the resistance, or is the resistance being overcome in a direction other than straight downward?

The resistance increases throughout the stroke. At the very top of your pull down, you’re probably pulling only 50 lbs or so. You don’t reach the full 260 lb level until the ends of the “power rods” are almost touching that first pulley.

Seca 700 Physician’s Balance Beam scale with Heigh Rod