Woke up with a sore knee this morning
Not serious - been there before but this time I'll give it a couple of days before pounding the boards again.
The jump rope has become the cornerstone of my workout regimen over tha past year. When I'm working with a trainer, we do jump sets during the "rest" periods between lifting different weights.
Lifting weights actually raises your metabolic rate for several hours after the workout finishes so its great. I try to balance the aerobic and anaerobic elements. Circuit training is a useful compromise when the schedule is tight.
Non FF commercial plug - check out "Buddy Lee Jump Rope" on google.