All I am saying is that aceleration needs to be over the longest possible distance and it needs to efficient.
yes but what happens if your athlete isn’t strong enough to hold the speed.what do you focus on then? could you post a clip of him running??
He is strong enough today he ran some 300’s one 38 and another 40, he gets better every week last week he was running 43’s and 46’s. I think you are right Coach Hare when you talked about quick turn over rate and not acceleration. Good form and not relaxed, and without te sprint lift. How do you teach that.
Sounds like he’s trying too hard / pushing -
I’ve had the same problem - ie leading @ 60m then getting caught because of pushing / stressing out - I’m trying to address this by approaching the next few races with a different attitude -
not think about winning / not think about a fast time - just concentrating on the last 40m being relaxed
my speed end is fairly consistant throughout 100m runs - so I know it’s an experience problem - unimportant meets with no pressure , seen as a practice might help .
Helped me on my last run .
it is great to run a 10.6 and have problems holding top end speed. Remember that your athlete is probably the strongest athlete on the field if he is leading at 40m - 60m. there is a transition phase from the drive phase that he might not be getting. it is important that the athlete not forget about the arm drive once he is in the middle of phase his race. after all it is the strength of his arms that got him out of the blocks so well. I do agree with many of the others who have stated that it is important to extend his drive phase to 60m but we all know that he will get to max velocity well before that. take a good hard look at his start. if this runner is also a hurdler he is trained to be up in sprint form in about 13m. Way earlier than a 100m sprinter, if he is not a hurdler then it may be that he is “popping up” to early and therefore he is winning at 40m - 60m because he is in his sprint form earlier than the rest.but those who are still in their drive phase will catch up because of fatigue. a sprinter can only hold max velocity for appx 20m then fatigue and decelaration factor into everyones slow down. I would love to see a clip og him running this would allow for an even better assesment
Maybe that;s my problem. i’m good through 60m…but after that I fade…I think I am using/ taking up to much energy in my first 40m (drive). how do i slow that down and gradually build up to my top speed?
The 10.6 athlete is showing a typical development pattern in terms of distribution over the race. Does it make a lot of sense to maintain the status quo and worry about distribution (as long a the technique is relaxed and smooth) or do you simply move on to the next phase of his development to:
First: Lessen the drop-off percentage over the final section through appropriate Speed and Special Endurance.
Second: Improve top speed through the selection of appropriate drills and special speed sessions (flying 20s etc)
He has a great start and drive phase, his drive phase extends to almost 40 meters. In answer to previous comments.
Thanks Mr. Francis, we do some special speed sessions and he needs to relax while running. I saw something about ins and outs teaching the athletes to inhale and exhale while running. We run flys 20 ,30, 40 60m 2x weekly and they do help them kids in their speed. How oftem do you give them special endurance sessions and speed sessions?
The key to not turning over too fast too soon is moving through the full range of motion. The stretch reflex is also activated from going through the full range of motion. Recovery then happens because of the reflex rather than of the athlete volition. The athlete focuses on one part of the movement and the rest unfolds naturally. This way, the athlete does not get as tired because he/she allows the reflex to work. The athlete should gain most of his/her speed by 40 but we all know that we accelerate at a decreasing rate until acceleration becomes zero. The faster we get, it is harder to see the differences in the changes in speed. Acceleration may be negligible at the higher speeds meaning the positive changes are minute. If speed is changing, you are accelerating…it does not matter by how much. Acceleration should approach the point where the athlete is on the edge of going out of control which happens somewhere between 60-70 meters (depending on the athlete’s physiological make up). The athlete then maintains by keeping stroke speed constant. Note that stroke speed gets faster as the athlete accelerates.
Coachhare
A few thoughts:
1: Full range, as you suggest, will yield the fastest rate of acceleration. (There is a thread on this topic related to Bruny Surin 1999 in Seville on the old forum)
2: Rate does NOT increase throughout the entire acceleration phase, but, rather, peaks around 25 meters or so and then the relationship between stride length and frequency takes over (with length increase outweighing a slight drop in frequency during the remainder of the rise to maximum speed). Thes frequency ratios are documented in “Track and Field”- the old but great East German text, with the length curves on pg123, frequency curves on pg 124, and the resultant top speed curves on pg 125.
3: These rate changes occur naturally as the athlete completes his stride, as you rightly suggest.
My approach to sprinting is based on the impulse-momentum principle. First, there is the resistance of the ground as well as the athlete is at rest. The athlete uses the resistance of the ground to propel his/her body forward. No resistance on the ground, no propulsion. Secondly, because the resistance is highest at the beginning of the race, the athlete has to work harder on pushing the ground. The impulse from these earlier pushes should yield to a higher stride length. Note that we are still working against the resistance of the ground. As the athlete gains momentum, the resistance of the ground deminishes with speed (velocity). The legs are able then to cycle through faster because of the reduction in resistance. Sprinting is like a dance between the ground and the athlete. The whole idea is the athlete working the resistance until it deminishes. Some athletes just run and base everything on mere foot speed. That is why I said earlier that it is the quality of momentum that athlete gets rather than mere turnover. This way the athlete can build up to higher top speeds over a longer distance. Next, it takes time to build up turn over (frequency) if the athlete is going through the full range of motion. The same principle applies whether it be cycling a bike, or any other mechanical device. The human is no exception. If the athlete is lengthening at the end, there is definitely a break down in machanics which cause him/her to overreach. My main concern is how fast the CoM is moving through the air and down the track. If the athlete can get off the ground fast by extending, the result would be that the CoM will travel corresponding distanse depending on the angle of take off.