I use EliteFTS bands, so the colors don't quite match up. EFS's orange, "light" bands are roughly equivalent to the Rogue greens. And if you've used older iterations from either company, both of these are about the same resistance as the purples. We're talking the full length, medium width bands.
I have found bands to be useful for a few orthopedic issues. Modifying the resistance profile to be more top-heavy can be easier on the knees, but the elasticity just changes the feel of a movement, too...so it's not just the resistance profile. They can also kind of pull you into place in a good way, e.g. on hacks they all but force you to keep your hips under you and use your glutes to stabilize, which actually means more quad tension but a better feel for the knees.
To
@SouthernMuscle - I'd recommend
EFS's bands any day, I've been using them for close to 20 years, basically my entire lifting life since I discovered bands. You can't go wrong with the MountainDog band pack, although I'm not sure whether you'll have use for the really heavy bands in there...unless you're reverse banding 600+ lb. squats or the heaviest leg press ever, lol. I would go for a pair of Light (orange), a pair of mini (thin, red), and probably a pair of micro (super thin, orange...were yellow up until recently, lol). I haven't found much use for the "short" varieties, but YMMV depending on the machines you're banding.
Basically
- Light bands - Use bilaterally on leg presses, hacks, and maybe unilaterally on reverse band pressing - doubled over in many cases, depending on the distance between hook points
- Mini bands - upper body pressing movements, either one or two depending on the use case (I double over one behind the back for DB pressing, you might double over bilaterally for a smith press, etc.)
- Micro - pumpy movements like pull-aparts, lateral raises, etc.
The minis and micros are also ideal for backstage pump-up...and they're cheap enough to lose
A few examples - I don't use bands a TON, but for certain chest and quad movements I usually keep them in the rotation.
Hacks - 2 single-looped light bands
Sled-style Leg press - 2 doubled-over light bands (this is fucking heavy, but doubled-over minis is probably not enough for almost anyone)
DB press - 1 doubled-over mini