HOW DOES MOTION CHANGE WITH AERO-BAR HEIGHT?
During the winter of 2018, we set up a time-trial position test with local bike fitter Ivan O'Gorman and Cat. 1 cyclist Giancarlo Bianchi. The goal of our test was simple: evaluate motion data after making a significant 30mm reduction in aero-bar pad height on Giancarlo's Cannondale Slice.
One of the major benefits of the LEOMO TYPE-R is that it's IMU-based. "IMU" stands for inertial measurement unit, and when paired with the TYPE-R head unit, our sensors allow bike-fitters and athletes to gain a better understanding of how their motion changes while riding new positions out on the road. During this test, we also used a power meter, but athlete may have a tendency to "force it" during testing in order to hit their wattage, without factoring in motion data.
During the test Giancarlo noted: "Upright at first, felt a little bit more comfortable, but I was definitely able to hold the power in the more aggressive position. When it comes to racing, it really boils down to whicheven position is faster. I'm a little bit curious to see what the data shows once we analyze it."
After analyzing the data from Giancarlo's test, the data showed that his motion didn't change significantly, despite the major change in aero-bar pad height (lowered 30mm). This helps the athlete and bike-fitter develop a more complete picture of what the optimal position is for power-production.
In conclusion, Ivan noted:
"When we're looking at tests like this, we're looking at a significant positional change of -30mm, and you're really intrigued to know if there is a separation in motion data. Using the LEOMO dashboard, we can see that the rider did an excellent job of maintaining consistent power, and the motion metrics have a tight correlation. We can clearly see that the more agressive position has a higher average speed. We wanted to know what the impact of the more agressive position would be to the rider's sense of feel, to the rider's sense of perceived effort, and also to the motion metrics. The outcome was that those motion metrics for both trials were very tight. The arrows are pointing toward the more agressive position being the faster position, so that's the avenue we're going to explore in the future."