s*****2
发帖数: 472 | 1 as I saw yesterday, this climbs and descends pretty well. Cannot help sharing
here. Feels like over priced at current weight though.
http://www.youtube.com/watch?v=_5P1WsnWV1Y |
h******2
发帖数: 1498 | 2 looks like on the up-swing your weight is actually working against you --
there is no pulling movement. |
s*****2
发帖数: 472 | 3 they do have straps for now.
【在 h******2 的大作中提到】
: looks like on the up-swing your weight is actually working against you --
: there is no pulling movement.
|
w********6
发帖数: 12977 | |
V*****n
发帖数: 893 | 5 another "inventions for losers"...
just like John oliver in his first stand-up referred the floating grill (so
that you can grill when you are hanging out in the pool) as the absolute
extreme of American consumerism.
sharing
【在 s*****2 的大作中提到】
: as I saw yesterday, this climbs and descends pretty well. Cannot help sharing
: here. Feels like over priced at current weight though.
: http://www.youtube.com/watch?v=_5P1WsnWV1Y
|
m******e
发帖数: 428 | 6 toon, you are kinda bitter these days... |
V*****n
发帖数: 893 | 7 bitterness is the foundation for sweetness!
【在 m******e 的大作中提到】
: toon, you are kinda bitter these days...
|
V*****n
发帖数: 893 | 8 btw: I guess this is somewhat of an improvement over its predecessor - the
treadmill bike! - in terms of its ridiculousness... |
r**m
发帖数: 1825 | 9 that guy claims it climbs better than conventional bike
sharing
【在 s*****2 的大作中提到】
: as I saw yesterday, this climbs and descends pretty well. Cannot help sharing
: here. Feels like over priced at current weight though.
: http://www.youtube.com/watch?v=_5P1WsnWV1Y
|
c*******r
发帖数: 13580 | 10 less aero dynamic
【在 r**m 的大作中提到】
: that guy claims it climbs better than conventional bike
:
: sharing
|
|
|
s*****2
发帖数: 472 | 11 the two co-founders, being the only two employees LOL, both finished 5
passes this year on these bikes. One is much faster than me; the other is slower. I believe
with industrial optimization, this toy could be real and fun. It may indeed
climb better (despite its weight) due to the standing form.
It is indeed less aerodynamic; so it would never beat traditional bikes in most racing condition.
【在 r**m 的大作中提到】
: that guy claims it climbs better than conventional bike
:
: sharing
|
h******2
发帖数: 1498 | 12 it's probably more efficient than a conventional bike ridden in the out-of-
saddle position. when you ride out of saddle on a conventional bike there
is more power output but it's also less efficient, and your heart has to do
more work because it has to pump blood further up. |
V*****n
发帖数: 893 | 13 I read a study comparing standing up and sitting, there are no efficiency
difference among experience cyclists. But they do stress a smooth pedaling
while standing as well.
do
【在 h******2 的大作中提到】
: it's probably more efficient than a conventional bike ridden in the out-of-
: saddle position. when you ride out of saddle on a conventional bike there
: is more power output but it's also less efficient, and your heart has to do
: more work because it has to pump blood further up.
|
h******2
发帖数: 1498 | 14 in the standing position the blood has to be distributed further away from
the heart in the vertical direction, compared with the sitting position. so
some work done by the heart is not transformed to kinetic energy.
imagine this: you have two radiators that are used to cool the engine. One
is placed horizontally and the other is placed vertically. it will be
easier for the water pump of the horizontal radiator to circulate the
coolant.
【在 V*****n 的大作中提到】
: I read a study comparing standing up and sitting, there are no efficiency
: difference among experience cyclists. But they do stress a smooth pedaling
: while standing as well.
:
: do
|
c*******r
发帖数: 13580 | 15 interesting. is that extra 30 centimetres that big a deal compared to all
other factors?
so
One
【在 h******2 的大作中提到】
: in the standing position the blood has to be distributed further away from
: the heart in the vertical direction, compared with the sitting position. so
: some work done by the heart is not transformed to kinetic energy.
: imagine this: you have two radiators that are used to cool the engine. One
: is placed horizontally and the other is placed vertically. it will be
: easier for the water pump of the horizontal radiator to circulate the
: coolant.
|
h******2
发帖数: 1498 | 16 from the heart's perspective, your legs are extended lower (when you stand
up), and the torso is elevated higher. the total vertical difference is
probably around 50cm compared with a sitting position.
there is 5.6 L (probably around 6kg) of blood in the body.
at resting heart rate, it takes the heart about one minute to move all the
blood to circulate the entire body. during exercise, it probably takes half
the time as one's heart rate easily doubles.
so, at least, the heart has to lift tha
【在 c*******r 的大作中提到】
: interesting. is that extra 30 centimetres that big a deal compared to all
: other factors?
:
: so
: One
|
V*****n
发帖数: 893 | 17
No, it's nowhere near the efficiency of a conventional bike in climbing.
【在 s*****2 的大作中提到】
: the two co-founders, being the only two employees LOL, both finished 5
: passes this year on these bikes. One is much faster than me; the other is slower. I believe
: with industrial optimization, this toy could be real and fun. It may indeed
: climb better (despite its weight) due to the standing form.
: It is indeed less aerodynamic; so it would never beat traditional bikes in most racing condition.
|
