In the past few years, we have covered plenty of under desk exercise machines. The EGOFIT Walker is also worth a look. It is an under desk treadmill weighs under 45lb and can handle users over 250lbs. It has a speed range of 0.6 to 3mph.
You will be able to see time, speed, calorie, and steps on the digital display. When done, you can easily fit the Egofit Walker under your bed.