i haven't watched my DVR of the races but from the results it's almost all FR and SO. you had traore who was a grad student, hinch left early, last year was an olympic year.
There are a few factors in addition to cool temperatures. Setup in the blocks is critical in the 100m and affects the direction of force and momentum in the acceleration phase. Shoulders should be directly over hands not leaned forward. Also the arms should be straight with the bend of the arm (frontside of elbow) pointed forward and not out to the side. This ensures as arms leave the ground and bend, the elbows move straight back and not out to the side which causes rotation and wastes energy. The arms are driving force into the ground in a particular direction. Also, once an object leaves the ground it's predetermined where it will land, so the first steps are all important to how force is applied and direction of momentum. How footpads are setup is another topic altogether.
Anthony had a good setup though the video is taken at an angle so it's a little difficult to determine what exactly is going on. It appears he had a longer acceleration phase and reached his top speed later which may have sealed the win. Both USC guys have less than ideal setups - especially Nketia in lane 1 - his is example of everything not to do. Thomas in lane 8 shoulders appear to be leaned forward and not over hands like Anthony. Both LSU guys have bent elbows pointed out to the sides, and Watkins/LSU in lane 6 had forward lean with shoulders ahead of hands.
The 200m is twice as long, so there is more time to overcome the impact of a bad start. It's always amazing to me how poor starts are at this level and what athletes are coached to do.
You can do a YouTube frame by frame forward "." or back "," and watch where elbows and arms go in first movements.
This post was edited 4 minutes after it was posted.
Relative humidity per se is irrelevant regardless of what some people remember incompletely about the effects.
Starting at the basics, it is the mass of air that you have to push aside that matters which is why the lower density of air at altitude makes sprint speeds faster at altitude.
Air is composed mainly of Nitrogen N2, molecular weight 14, and Oxygen mw 16. But also a bit of CO2, mw 28, and water, H2O, mw 10. So if you add water mw 10 air, mw ~15, you lower the density of air (for a given air pressure). So you might think that a relative humidity of 99.9 percent at a temperature of 50 would have a big effect, but it doesn't because the amount of moisture that the air can hold increases rapidly with temperature. That's because the dew point temperature is 50. If you keep the moisture in the air constant but raise the temperature to 86 degrees the Relative Humidity has fallen below 30 percent. Now if the Relative Humidity is 99.9 percent, there is almost four times as much water in the air and so the density of the air is lower - you have been replacing air with lighter water moisture.
Note however that the change in air density is quite small. At 86 degrees and 100 percent Humidity there are 27 grams of moisture in a kilogram of dry air while at 25 percent Humidity there are 7grams, the difference is 20 grams or two per cent and you have replaced mw 15 with mw 10 so it's one third lighter. So the change in air density is a little less than two-thirds of a percent. This is larger than having 30 percent Relative Humidity at 50 degrees where the change in air density reduces the moisture by about 4 grams, 0.4%, times one third or barely above 0.1% difference in air density.
This is long but should help you understand humidity better. Also note that relative humidity is usually not very useful pixmig’s acrylic album, it is the dew point that matters. And over a day the dew point is quite stable while every one degree increase in temperature changes the Relative Humidity by about three percent so it is easy to have the Relative Humidity at 90 percent at dawn 60 degrees and drop to 40 percent at 86 degrees (note in Celsius these temperatures are 10 and 30 degrees).
The whole field was relatively slow. Hence, either the field was held overly long and tightened up or conditions were slower than measured. That could be because of swirling wind or wind changing direction. You cannot achieve max power, hence, max acceleration, in sixty degree weather. You might still have a longer acceleration phase in the same weather for the 200m, though, and actually run faster. 100m is too short for this temp.
Also, the semis are less pressure and the best athletes can have a bit of relaxation which actually produces a better result. In the final, with everything on the line, a sprinter who “tries harder” usually runs slower. the pressure of the final can have this effect. and in the 200, what was the wind on the curve. they don’t measure that wind. a big curve tailwind and a legal home stretch can produce great results.
But 100m sprinters usually run faster in the final. Why would this one be different?
I assume that you don't seriously follow sprinting.
You are probably basing your statement on limited knowledge, like Olympic finals. The sort of runner that makes the Olympic final is different from guys barely making an NCAA final and placing 5th-8th among college athletes. (Different in ability, different in confidence, certainly different in experience.)
Just because Bolt, DeGrasse, Lyles, and other global elites deliver their season's best in the championship final doesn't mean it's the norm among up-and-coming guys fighting for 9.9-10.2.
I assume that you don't seriously follow sprinting.
You are probably basing your statement on limited knowledge, like Olympic finals. The sort of runner that makes the Olympic final is different from guys barely making an NCAA final and placing 5th-8th among college athletes. (Different in ability, different in confidence, certainly different in experience.)
Just because Bolt, DeGrasse, Lyles, and other global elites deliver their season's best in the championship final doesn't mean it's the norm among up-and-coming guys fighting for 9.9-10.2.
Also, it was very cool for sprinting.
And they had raced the 4x100 barely an hour prior.
But 100m sprinters usually run faster in the final. Why would this one be different?
I assume that you don't seriously follow sprinting.
You are probably basing your statement on limited knowledge, like Olympic finals. The sort of runner that makes the Olympic final is different from guys barely making an NCAA final and placing 5th-8th among college athletes. (Different in ability, different in confidence, certainly different in experience.)
Just because Bolt, DeGrasse, Lyles, and other global elites deliver their season's best in the championship final doesn't mean it's the norm among up-and-coming guys fighting for 9.9-10.2.
And not all elite athletes go faster in the finals. One such person who comes to mind is Marie-Jose Ta'Lou Smith who consistently runs her semis faster than she runs the finals.
Look at the Paris Men's finals: Athletes who beat Lyles in the semis, ran slower in the finals.
I assume that you don't seriously follow sprinting.
You are probably basing your statement on limited knowledge, like Olympic finals. The sort of runner that makes the Olympic final is different from guys barely making an NCAA final and placing 5th-8th among college athletes. (Different in ability, different in confidence, certainly different in experience.)
Just because Bolt, DeGrasse, Lyles, and other global elites deliver their season's best in the championship final doesn't mean it's the norm among up-and-coming guys fighting for 9.9-10.2.
And not all elite athletes go faster in the finals. One such person who comes to mind is Marie-Jose Ta'Lou Smith who consistently runs her semis faster than she runs the finals.
Look at the Paris Men's finals: Athletes who beat Lyles in the semis, ran slower in the finals.
Seen a lot of sprnting decades and decades and decades, I do epect the finals to be faster because MOST the time they are.
And not all elite athletes go faster in the finals. One such person who comes to mind is Marie-Jose Ta'Lou Smith who consistently runs her semis faster than she runs the finals.
Look at the Paris Men's finals: Athletes who beat Lyles in the semis, ran slower in the finals.
Seen a lot of sprnting decades and decades and decades, I do epect the finals to be faster because MOST the time they are.
Again, this depends on the level you are watching.
"Semi syndrome" gets less common at the highest levels.