Opticreep said:I've always wondered if there was a significant difference
between using a treadmill and actually running (or
jogging) around a track.
The main difference is that when you're running outdoors,
you are moving relative to the wind.
Quoted message said:It seems to me like a person on threadmill doesn't exert
as much horizontal force as a person actually running
around a track. In other words, a threadmill guy could
basically use most of his energy hopping up and down while
the machine moves the tracks under him.
This is true when you're running on the road too. You're
not accelerating forward, so you could just "hop up and
down" while the "road moves under you". Just like a cyclist
can sit back and let the wheels spin, and only push hard
enough to overcome various obstructions such as wind
resistance, and friction between tires and road. On a
treadmill, you're in a moving frame of reference which
confuses a lot of people.
Quoted message said:Sure, a threadmill person would still move his legs
forward and backwards... but that takes a lot less effort
than having your legs *push* your body forward.
They don't "push your body forward". You're already moving
before you put your foot down, right ? All you have to do is
prevent yourself from slowing down -- avoid obstructing your
movement. You might toe-off, but you're not accelerating any
more than you are on a treadmill.
Quoted message said:So does anybody have a good idea how much less effort (or
calories) a person would exert jogging 7 miles on a thread
mill instead of jogging on an actual track?
Almost exactly the same. Differences are due to air
resistance, possible differences in terrain, and calibration
errors on the treadmill.
Cheers,
--
Donovan Rebbechi pegasus.rutgers.edu~elflordOpen ↗