After getting a herniated disk in my neck from doing the traditional barbell-behind-the-neck squats, I needed something that would allow me to continue working my legs while not putting any strain on my neck. After searching the net, I found nothing that I could make that would fit the bill. So, after much thought, I designed this machine in AutoCAD, then put it together one weekend in the space of around 4 hours for a total cost of $36.11 (compared with $270 for the dangerous looking Body Solid vertical leg press machine, skipping straight to the $1000-$1500 range for anything better).
The machine is designed off of a creeper (flat board on wheels used to work under cars) that is used in a vertical position to allow you to slide up and down a wall, with slots for up to 4 of the 45lb plates (180lb plus weight of machine (32lb) = 212lb). The attached PDF's give dimensioned drawings of the Leg Press machine, as well as multiple 3D views.
See video below or go to http://youtu.be/EafB3TLPGKc for a demonstration of how the machine works!
Ready? Click Step 1 to see what you need to get started...