It's got serious flex! The deck is marketed as "Flexdeck". Running
on concrete is bad! <G>
Hardwood floors over wood frame construction usually also flex a bit,
this is referred to as "bounce". If you're in an area that puts wood
over concrete slabs, you might not be aware of it. I always take it
for granted until I spend a week visiting Florida.
Wooden baseball bats, hockey sticks, musical instruments... all rely
on wood's flexibility to some degree.
Think "prefinished flooring"... It's the right thickness, smooth,
I would have thought oak would have less flex than MDF. Granted it
undoubtedly has less than plywood of similar thickness, but I just assumed
oak would be nice and solid without noticable flex. Now I'm assuming how
thick the deck is on your treadmill, possibly it doesn't need to be thick
depending on how its designed and sprung.
I think MDF flexes, just that it has far less strength and endurance to it
Likely the only reason they used MDF is that it was cheaper than plywood.
IMHO the stuff is pure junk. I'd go ahead and build up the plywood. It has
got to be better than termite puke and rat piss - you know the stuff they
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