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I changed jobs recently and replaced a daily  bicycle commute with a home office - great to work from home, but no commute took a toll on my exercise routine.  Answer?  Treadmill Desk!

Three basic steps to building the desk, all go into each in detail

1 - Gather materials
2 - Remove and remount controls
3 - Build and install desk

Step 1: Acquire Materials

You will need:

1 - A treadmill  - doesn't have to be top of the line, but should be stable and relatively quite.  I used a Nordic Track C2200.  From Craigslist - $120
2 - 1/2 sheet 3/4 finish grade Plywood
3 - Wood screws
4 - scrap 1x1
5 - 2ea 3-way PVC Elbows
6 - ~ 3' 3/4 PVC  & 3' 1 1/2 PVC
7 - 2ea large hose clamps

stain and paint as desired

Your materials may be slightly different based on the treadmill you use.

Step 2: Remove and Remount Controls

I had considered completely tearing down the control and installing just a couple of buttons on the desk itself, but decided to go this way as it would be a lot less work, and I can return the treadmill to it's original state if I want.

The control was attached to the treadmill with 11 screws, a multi-wire connector and a ground wire.  After removing all of it, I fashioned a new bracket with PVC pipe, using 1 1/2" for the uprights and 3/4" for the cross piece, then spray painting it back.

the bracket then attaches to the upright with hose clamps.  I rerouted the control wire through the upright, then back to the control.  You can see it in the second picture looped over the PVC.  I reattached the ground wire to the upright at the level of the control

Step 3: Build and Install the Desk

Step one was to build a quick mock-up with 2x4 and an old shelf to check for height and placement.  I walked/worked for 7 miles on the mock-up the day before I built the desk.  In the first picture you see the control popped up on an ironing board while I considered whether or not to completely tear it down.

I decided to use two shelves and put my laptop on the bottom shelf - this gave me more useable desk space and a better neck angle when working.

The design I ended with  used slightly more than 1/2 sheet of plywood, but the layout below can can be cut from 1/2 sheet

top shelf - 48" x 18"
bottom shelf - 32" x 22"
front panel 48" x 7 1/2"
side panels 22" 5"  (cut from end of bottom shelf

 (my shelves are 20 and 23" inches wide - you need the bottom shelf to be about 3" deeper than the top)

Holes drilled in front panel slide over the support handles
bottom shelf wide is determined by distance between frame uprights, fits snugly

assembly using scrap 1x1, glue, a finish nail gun and wood screws.

I cut a 1/4" groove in the bottom of the bottom shelf to align with the cross support of the frame.  This lets the desk sit very snugly on the treadmill without having to be physically attached.

Finished with oak stain and black paint on the edges.

Step 4: Walk!

I'm walking at my desk while I build this post!

Some things I would do differently if I did it again, or might change later:

I'd open the front of the desk between the shelves to use for storage.

I would  design it to allow the treadmill to fold up easier.  You can see in the second picture that it does fold up, but you need to slide the desk off of the handles and set it back on top.

I would add an electrical outlet and USB charging port.
Nice. I like this a lot. I didn't want to pay as much for the desk as I did the treadmill, but that is all I could find online. Until I found your Instructable! Many thanks!
P.S. Love that you moved the treadmill panel and kept the handles 'handy' even through the wood.

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