There's Always Time To Get Fit

The main excuse for many who don't exercise is lack of time. This, however, is based on the misconception that you need a lot of time to exercise. The fact is that your body will respond better to less, but more focused exercise, requiring less time, but more intense effort and concentration.  A good example is the "7 Minute Workout," seen in the image here. While the main effort part of this program takes only about seven minutes, if you add a pre-workout warm-up and then cool-down and stretching afterward, you can get a full-body workout in less than 30 minutes, without any equipment or having to leave your home. This program is also good for strengthening the heart and lungs, because it involves short bursts of intense effort, sandwiched between brief rest periods.  It's also very good for the mind and your nervous system, because all the movements use your own body weight, requiring you to be very mindful of your movements and position.  If you have not exercised in a long time, you must ease into this, possibly by lengthening the rest periods and taking it easier during the effort phase. You can also modify the exercises to your abilities and fitness level.  I also recommend changing the routine every 3-4 weeks, to keep your mind more active and prevent injury from microtrauma, or repeatedly doing the same thing for too long.  If you are very unfit, you should also consult a biokineticist or personal trainer to make sure you do these exercises properly.  This is just one example of the many options available to us and will not only improve the stability of your spine, but will also get you ready for life's never-ending challenges.

For more information:
http://deathofthediet.com/2013/07/17/modifying-the-seven-minute-workout/
http://well.blogs.nytimes.com/2013/05/09/the-scientific-7-minute-workout/?_php=true&_type=blogs&_r=0