Resistance Level
Color
Resistance Range
Extra Light
Orange
4 - 8 lbs.
Light
Lime Green
5 - 13 lbs.
Medium
Red
8 - 16 lbs.
Heavy
Light Blue
11 - 22 lbs.
Extra Heavy
Purple
13 - 27 lbs.
Ultra Heavy
Gray
15 - 31 lbs.