I'm starting a new breaktime regimen at work. After sitting in my office for awhile, normally at the computer or on the phone, I need a break to clear my head and stretch out. For some time I've kept an 18lb kb on my desk to use for quick intervals during the day, plus it makes a great conversation piece - as in: *** is that for?? But I wanted something different. Fortunately there is a sporting goods store down the street so I went looking for ideas and returned with rubber tubing with handles. After two days I'm hooked; in 5-10 minutes I can get the blood flowing without over exerting myself and I can focus on the annoying kink in my shoulder for rehab and stretching. Then it dawned on me that my phone has a stop watch on it that would work well for timed planks to hit the core. I just tried it and now I have no excuse for not doing core stuff and measuring progress.