I was able too, but oh my goodness (I know that today it is acceptable to write omg, but what the heck, why not go "old school".) I am amazed at how difficult it is to get 100 J. J. done without feeling like my legs are limp noodles and my chest is going into convulsions! Not to mention the fact, that after 50 or so J. J., it feels as if the floor is sucking me down and gravity is working extra hard to keep me on the ground. (It's a conspiracy I'm sure; gravity has it in for us ladies.)
I am a fighter though! I would take a look in the mirror (ouch) and say, "Not today you don't! Today, you are NOT a quitter!"
My hope is that, if this has been hard for you to do, that you will not give up. Keep at it!!! Do 4 sets of 25, or 50 in the morning and 50 in the evening. Send text messages to friends to encourage one another. Set the alarm on your phone to remind you. Place a note on your fridge, refrigerator, icebox (whatever term suites your dialect.) Do what is necessary to help yourself!
If you are substituting the J. J. with another more flexible exercise for yourself, then let us know. Let's whip this gravity thing in the butt (literally) ladies; and any men taking this challenge.