Guillaume finished the Pays d'Aix half-iron man in 5:49:59 (less than 5:50!). Race took place yesterday in/around the beautiful city of Aix-en-Provence in South France. The biking part had 1,069m ascending elevation (!)
Guillaume finished the Pays d'Aix half-iron man in 5:49:59 (less than 5:50!). Race took place yesterday in/around the beautiful city of Aix-en-Provence in South France. The biking part had 1,069m ascending elevation (!)
tough course. I've been through Aix-en-Provence a long time ago, but the mountains will still be there.Guillaume finished the Pays d'Aix half-iron man in 5:49:59 (less than 5:50!). Race took place yesterday in/around the beautiful city of Aix-en-Provence in South France. The biking part had 1,069m ascending elevation (!)Yes, congrats to Guillaume!3:25:41,well done guillaume
(How did he feel about the race?)
Things are moving fast these days (Hawai, Kenya, ...) but you're right the mountains surrounding Aix are still there!tough course. I've been through Aix-en-Provence a long time ago, but the mountains will still be there.Guillaume finished the Pays d'Aix half-iron man in 5:49:59 (less than 5:50!). Race took place yesterday in/around the beautiful city of Aix-en-Provence in South France. The biking part had 1,069m ascending elevation (!)Yes, congrats to Guillaume!
(How did he feel about the race?)
I was wondering where they would swim as it's a ways away from the sea, but it seems they swim in the Lake of Peyrolles
Effective stride is a function of biomechanics with the legs being double-pendulums. Efficient long-distance running requiring tuning for the natural frequencies of these pendulums. (Sprinting expends a lot of energy moving the legs forward quickly to take the next stride. As running distance increases, optimal form relies more and more on natural pendulum motion.)BTW, I'm working on my stride. I believe my strides are way too small.
Is there some kind of rule of thumb to calculate the most effective stride given runner (legs) size, speed, pace, distance, etc... ? Merci!
I bet you can save a lot of money with an iPhone and a pose analysis app?Effective stride is a function of biomechanics with the legs being double-pendulums. Efficient long-distance running requiring tuning for the natural frequencies of these pendulums. (Sprinting expends a lot of energy moving the legs forward quickly to take the next stride. As running distance increases, optimal form relies more and more on natural pendulum motion.)BTW, I'm working on my stride. I believe my strides are way too small.
Is there some kind of rule of thumb to calculate the most effective stride given runner (legs) size, speed, pace, distance, etc... ? Merci!
The general thought is that amateur runners actually tend to over-stride-- landing their feet too far in front of them which actually creates braking forces and is hard on the knees. The supposed goal is to run with a much more up-right body posture (as if one were being pulled at the belly) and have the feet land directly under you.
Current beliefs on stride are actually focused more on cadence with the supposed optimum being 180 spm.
P.S. If you have money to burn, you might look into the Garmin HRM-Tri or HRM-Run heart rate strap to get data on running dynamics. These straps give real-time data on stride length, ground contact time, vertical oscillation, left-right balance, and others. But these straps might require you to upgrade your Garmin watch. There's also foot-pod systems out there that measure aspects of your running form.
Nice! So have a friend coast on a bicycle next to you with a iPhone while you run to get video of your running form. Some of the better smartphones have high frame rate video. At a 120 fps, you'll get about 40 frames per step.I bet you can save a lot of money with an iPhone and a pose analysis app?Effective stride is a function of biomechanics with the legs being double-pendulums. Efficient long-distance running requiring tuning for the natural frequencies of these pendulums. (Sprinting expends a lot of energy moving the legs forward quickly to take the next stride. As running distance increases, optimal form relies more and more on natural pendulum motion.)BTW, I'm working on my stride. I believe my strides are way too small.
Is there some kind of rule of thumb to calculate the most effective stride given runner (legs) size, speed, pace, distance, etc... ? Merci!
The general thought is that amateur runners actually tend to over-stride-- landing their feet too far in front of them which actually creates braking forces and is hard on the knees. The supposed goal is to run with a much more up-right body posture (as if one were being pulled at the belly) and have the feet land directly under you.
Current beliefs on stride are actually focused more on cadence with the supposed optimum being 180 spm.
P.S. If you have money to burn, you might look into the Garmin HRM-Tri or HRM-Run heart rate strap to get data on running dynamics. These straps give real-time data on stride length, ground contact time, vertical oscillation, left-right balance, and others. But these straps might require you to upgrade your Garmin watch. There's also foot-pod systems out there that measure aspects of your running form.
Exactly! Or position yourself in the middle of a fields with a cool glass of pineapple juice in one hand and the iphone in the other, and ask your friend to run laps around you?Nice! So have a friend coast on a bicycle next to you with a iPhone while you run to get video of your running form. Some of the better smartphones have high frame rate video. At a 120 fps, you'll get about 40 frames per step.I bet you can save a lot of money with an iPhone and a pose analysis app?Effective stride is a function of biomechanics with the legs being double-pendulums. Efficient long-distance running requiring tuning for the natural frequencies of these pendulums. (Sprinting expends a lot of energy moving the legs forward quickly to take the next stride. As running distance increases, optimal form relies more and more on natural pendulum motion.)
The general thought is that amateur runners actually tend to over-stride-- landing their feet too far in front of them which actually creates braking forces and is hard on the knees. The supposed goal is to run with a much more up-right body posture (as if one were being pulled at the belly) and have the feet land directly under you.
Current beliefs on stride are actually focused more on cadence with the supposed optimum being 180 spm.
P.S. If you have money to burn, you might look into the Garmin HRM-Tri or HRM-Run heart rate strap to get data on running dynamics. These straps give real-time data on stride length, ground contact time, vertical oscillation, left-right balance, and others. But these straps might require you to upgrade your Garmin watch. There's also foot-pod systems out there that measure aspects of your running form.
Yes, and let's also have some coconut and almonds!Exactly! Or position yourself in the middle of a fields with a cool glass of pineapple juice in one hand and the iphone in the other, and ask your friend to run laps around you?Nice! So have a friend coast on a bicycle next to you with a iPhone while you run to get video of your running form. Some of the better smartphones have high frame rate video. At a 120 fps, you'll get about 40 frames per step.I bet you can save a lot of money with an iPhone and a pose analysis app?
Cool! And are there optimisation algorithms that compute a personalised optimal gait using gradient ascent and reinforcement learning and which helps you achieve that better gait by allowing you to earn extra likes on our instagram?Yes, and let's also have some coconut and almonds!Exactly! Or position yourself in the middle of a fields with a cool glass of pineapple juice in one hand and the iphone in the other, and ask your friend to run laps around you?Nice! So have a friend coast on a bicycle next to you with a iPhone while you run to get video of your running form. Some of the better smartphones have high frame rate video. At a 120 fps, you'll get about 40 frames per step.
Note: the video analysis is only a kinematic analysis which is necessary but not sufficient to characterize running efficiency. The video analysis can estimate the accelerations. But you need the mass-distibution in the feet and legs to determine the various forces (gravity + muscle). Mass has an effect on speed. Each kg of foot & shoe mass costs about 25 seconds per mile.
Yes!Cool! And are there optimisation algorithms that compute a personalised optimal gait using gradient ascent and reinforcement learning and which helps you achieve that better gait by allowing you to earn extra likes on our instagram?Yes, and let's also have some coconut and almonds!Exactly! Or position yourself in the middle of a fields with a cool glass of pineapple juice in one hand and the iphone in the other, and ask your friend to run laps around you?
Note: the video analysis is only a kinematic analysis which is necessary but not sufficient to characterize running efficiency. The video analysis can estimate the accelerations. But you need the mass-distibution in the feet and legs to determine the various forces (gravity + muscle). Mass has an effect on speed. Each kg of foot & shoe mass costs about 25 seconds per mile.
Thank you T4A. I don't know if it is the right approach. I have spent many years training on long distance (for the every man I am), forgetting about speed. I am trying to un-learn all this, working on my body position, gesture on much shorter distance. On the track I make my best to send my knees forward and upwards and run tiptoes. I thought that would help me gaining thigh strength and improve my posture. But, yeah maybe I'm just wrong. Anyway, it is probably good for cardiovascular capacity, as you also suggest.Are you sure this is the right approach? The optimal stride for long distance running is extremely different from the 100 m one. The perfect stride for long-term sustained efficiency differs from the one for super-short-term bursts of power.
That said, some kind of high-intensity training can build muscle strength and cardiovascular capacity.