Adarq.org

so his hips shouldn't be coming up higher when he brings them forward and up, about how high should they be going when trying to get to and maintain max speed, 90 degrees?

well they are pretty close to 90 degrees throughout the entire run.. his right hip seems to get to around 90 throughout, left hip doesn't. Could just be camera angle but I doubt it.

How high the knees get is going to depend alot on hip flexibility & acceleration style. Check these vids:

<a href="http://www.youtube.com/watch?v=vf12x5WSLN8" target="_blank">http://www.youtube.com/watch?v=vf12x5WSLN8</a>

<a href="http://www.youtube.com/watch?v=vf12x5WSLN8" target="_blank">http://www.youtube.com/watch?v=vf12x5WSLN8</a>

In the beginning, you see bolt getting his knees up higher than tyson. Then as they reach Max V, tyson's hips flex the least, bolt's 2nd, and asafa is #1 (highest knees).

greyhound looks a bit quad dominant...

were you kidding?

greyhound has big hamstrings on the hindlimbs, check it:


2003: Functional trade-offs in the limb muscles of dogs selected for running vs. fighting

The physical demands of rapid and economical running differ from those of physical fighting such that functional trade-offs may prevent simultaneous evolution of optimal performance in both behaviours. Here we test three hypotheses of functional trade-off by measuring determinants of limb musculoskeletal function in two breeds of domestic dogs that have undergone intense artificial selection for running (Greyhound) or fighting performance (Pit Bull). We found that Greyhounds differ from Pit Bulls in having relatively less muscle mass distally in their limbs, weaker muscles in their forelimbs than their hindlimbs, and a much greater capacity for elastic storage in the in-series tendons of the extensor muscles of their ankle joints. These observations are consistent with the hypothesis that specialization for rapid or economical running can limit fighting performance and vice versa. We suggest that functional trade-offs that prevent simultaneous evolution of optimal performance in both locomotor and fighting abilities are widespread taxonomically.




so, they have "less muscle distally", ie, the muscle belly is higher towards the origin of the bone, which means they have longer tendons, especially in their lower leg (ankles, ankle extensors specifically).

very similar to humans and elite sprinting.

peace

whippet:



pitbull:



greyhound:

Enough of this.

Check my post count on here versus yours.

OWNED.

It's like a powerlifting contest, you take TVS post count + adarq post count + db forum post count + WGF post count + evolutionary athletics post count, then come up with your total.

ok ok ill stop.

pc

http://www.assembla.com/spaces/talentid2009/documents/cN48bGVKer3OFEeJe5aVNr/download/0926BookinviteSelfSelectionofAthletesintosportsFinal.doc


The crural indexThe skelic index describes leg length in relation to torso length and is defined as the derived total leg length (stature minus sitting height) divided by sitting height.  These ratios are depicted in Figure 2. 



Crural index & long/high jumping:

Table 1. Here we show that while the computed somatotype components describe physique, the crural index (Davenport, 1933) represents an additional discriminant in describing physique variation across our adult sample.  A dominant crural index in classes 2 and 4 illustrates the importance of relative limb length in athletes trained for endurance and strength.  A smaller crural index may be advantageous for general agility, whereas a higher value may determine mechanically advantageous take-off technique in long-jump and high-jump events (Alexander, 1990) and in basketball, in tandem with development of commensurate muscle power to maximise femoral leverage Ackland et al., 1997).




Skeletal ratios
Significant differences in skeletal ratios are found between different types of
athletes even when differences in absolute body size are taken into account.
Marathoners tend to have a high skelic index (ratio of total leg length to
sitting height), that is, relatively longer legs. Distance runners also have a
higher crural index (ratio of lower leg length to upper leg length). Longer legs
reduce stride rate, and relatively shorter thighs mean that the resistance arm
on the upper leg is shorter. The muscle mass of the thigh is moved closer to
the axis of rotation of the leg, reducing the energy cost of locomotion. 



http://lib-ir.lib.sfu.ca/bitstream/1892/7871/1/b16962849.pdf
Anthropometric modelling of the human vertical jump

"A study of the proportions of animals of different species indicates that the
fast runners and jumpers are those that have long distal segments, such as
the horse, kangaroo, and the cat. The thigh segment of these animals is
short, ending before the segment leaves the pelvis or flank area The leg
segment is longer than the thigh; the foot segment is the longest, and the
toes are also quite long The animals described as the best jumpers have a
leg considerably longer than the thigh segment and therefore a large crural
index."




"Ross et al. (1982b) compared female high jumpers from the 1976 Montreal Olympic
Games to a group of Canadian reference females, and found that the high jumpers were
proportionally short in sitting height (in other words, proportionally long in the lower
extremities), and that the tibial length was also proportionally long. This supports the
notion that there is an advantage to having long lower extremities and a larger crural index
for jumping.
"

I thought I should drop in an introductory thread to announce my supreme being's presence here. You have all been blessed.

Well, not really, but somewhere in that area...

Welcome. Glad to have a "new" face around here.

Btw you're on the verge of exceeding my post count on TVS, which is really pissing me off.

!@)!@$()!@)%!@)%(!@

:F

Post studies regarding long jump, triple jump etc.