Ned said:I've been using treadmills for years and I've always had problems with
back and knee pain. I recently starting running along the beach and on
the boardwalk and I have no problem at all with my knees or my lower
back.
Beach is much worse, because it's either a banked surface if you're near the
water, or too soft if you're far from it.
Quoted message said:I'm Asthmatic and I've also felt a big improvement in my
breathing since jogging. I suspect there is something unnatural about
using a treadmill vs actually running.
No. Using a treadmill is "actually running".
Sometimes a change of scenery helps because it changes the sources of stress
on the body. But do keep in mind that you are comparing the long term effects
of treadmill running with running on the beach for a couple of weeks or so.
If you ran on the beach for the next 3 years, you may well have other injuries
instead.
Maybe there are some differences in the type of training you did in the two
modalities (speed, training frequency, weekly mileage, etc)
Cheers,
--
Elflord