Runners in the 400m finals appear to slow down in the final stages of the event as a result of moving into the lactic acid system (from the ATP-PC system). This change causes the athletes/runners to experience a decrease in maximal power output and running speed.
The ATP-PC system only lasts for about 8 seconds (before PC stores are depleted) at maximal effort, therefore the lactic acid energy system becomes the dominant supplier of ATP. This is what causes the drop in power and speed. At about 45 seconds, there will be another decline in power output and speed as the body becomes more reliant on the aerobic system for energy.
Kathy Freeman runs 400m in around 49 seconds. This means that she would have used all three energy systems (ATP-PC, lactic acid and aerobic). She would have dropped power and speed at around 8-10 seconds as her ATP-PC stores would have depleted, and moved into the lactic acid system, and at around 45 seconds (towards the end of the race) she would have changed into the aerobic system which also causes a drop in speed and power, just before the end of the race.
they are exausted
so they can finish in a faster time
so they can finish in a faster time
We watched the runners spurt to the finish line
Yes, the finish line has always been in Boston, but never the starting line. Since 1925 runners have started the race from the village of Hopkinton. Before that, the starting line was located in Ashland.
because it takes time to stop when you're running so fast. idiot. just look at cars, they can't stop instantaneously!
i was out of breath way before i even got to the finish line
There are two methods of timing a marathon: Gun Time or Real Time or Official Time: The time from the sound of the starter's signal to the time the runner crosses the finish line. Real Time or Chip Time: The time it takes to go from crossing the starting line to crossing the finish line. Races will supply runners with a computer chip, programmed with the runner's personal and race information, that is attached to one of their shoes, usually a shoelace. Some chips come with velcro and are attached around the ankle. The chip records when you cross the starting line, which has a mat that activates the timing, and when you cross the finish line, which also has a mat to deactivate the timing. Most large marathons use chip time since it allows runners to line up at the start with folks that can run about the same pace. They won't have to worry about pushing through slower paced runners to get to the front or being pushed by faster paced runners.
Along side at the same level (think of runners crossing a finishing line "breast to breast" they are abreast of each other and finish at the same time).
Winning a Trifecta pari-mutuel wager requires the selection of the first three runners to cross the finish line in a single race in the correct or exact order.
By Red Lighting or going before the green light on the Christmas tree or crossing the center line before the finish or hitting the wall before the finish
We'll never finish the project if you continue to be a perfectionist. When people's lives are on the line, it pays to be a perfectionist.
At the hand off start the next runners time when the baton crosses the finish line after the hand off. this is how the 4x400,4x800 and 4x1600 should be done
The boys raced for the finish line.