I’d agree with you on that. Too far from the specific speed, the GCT must be through the roof trying to drag that!
video is on you tube in some obscure place. I will get my training partner to post it on there again as he has on his pc for inspiration. Bolt is on the grass with 60 kg for about 60-80m from personal experience of being an older athlete late twentys now and how im running compared to previouse years and the development of partner who is 19 we run for 60 with 40kg not really worried about gct as not using as a plyo exercise but more as a way to strengthen legs for the full drive phase as well as being able to put power down on to the track later in the race. 10kg is less them what our sleds are by them selves lol im running faster and stronger now then i have since i was 21 only thing we added this year was sleds! Think to many people worry about gct and forget to work from every angle. I will also try to put the vid of us running with 40kg up but its on my phone so gotta work it out
Bolt with sled !
Look like they have on sneakers.
He HAS sneakers on…however, i’d never use on grass…just unable to push safely…then, he might be performing just build ups, or just a photo shoot session…
Hey look Usain uses a sled on grass! Wow, the secret to training! Then you remember he ran 20.13 +0.0 at age 16…
Dude thats YOU, he may like performing sled work on grass in sneakers, after all its not a big deal and who cares if the results are there.
the weight in those pics looks more than ten percent body weight to me. Also he has been doing sled since he began training athletics not just recently lol no one disputes sled alone will not make you run stupid fast times. But its clear can have a very good and positive affect on leg strength and power
Sled pulls would be plyometric, like sprinting IF they are done as I suggest- a time decrement of no more than 10%. I kept them at 30m and shorter because that is the point by which the major portion of acceleration is complete.
On the GPP video where it talks about hill workouts most reps are done at 40m distance and gets up to 60m towards the end. I thought sleds and isorobics are hill alternatives, and therefore should be treated equally for the most part training-wise. I know that hills are best if it’s even grass with right slope, and that isorobics provide constant resistance, whereas with sleds, there’s more resistance at the beginning because of overcoming inertia (static friction > kinetic friction). Is there any reason sleds and isorobics should be kept shorter than hills?
Also, on CFTS, I’ve read that resisted runs should be kept about 20% slower than non-resisted runs. Which would be better? 10%? or 20%? Maybe 20% for earlier gpp (wk 1-4) for learning to really lean and drive, 10% for later part of GPP (wk 5-7) to transition into faster speed? or 20% for GPP 1 and 10% for GPP 2?
If I were to do it on grass, then would I have to run a 30 on grass and then calculate time that’s 10 or 20% slower?
I have done hill work on the street just take care of your body. I also played around with long sleds pulls for strength endurance work 2x3x100 empty sled.
When you do those long sled pulls, would you be using low hill recovery and drive technique the whole time as if you’re starting? or would you get up into upright sprinting with heel recovery after 20-30m?