I have to suck it up!!!

Did some skipping a while ago. I thought it'd be fine, since the knee accident happened a week ago and it didn't hurt anymore. But unfortunately, my knee feels a bit sore now. Just a bit. Heck, I'm really weak.... I have had suffered much worse injuries when I was training for Taekwondo, back when I was in school. That was 4-5 years ago. I used to be strong, and every time a kick landed wrongly on me, I sucked it up. I was strong. I guess I've became somewhat weaker.