Those work fine but I prefer those with handles.The ones with handles can be more versatile and easier to use plus they come with graded resistances. I prefer the ones with detachable bands as opposed to those with fixed handles since they allow me to change the resistance of the band for different exercises.
It is called WORK-ing out for a reason.
I said getting fit was simple, I did not say it was easy.
Cardio burns calories, strength work burns fat.
Eat well to lose weight, exercise to get fit
You can not build a six pack using twelve packs
Often when we seek a magic bullet for fitness we end up shooting ourselves in the foot.
"I think calories are little germs in food that all moms are afraid of" Dennis the Menace