Cycling: dicovering brand new horizons with Wimu and Moxy

Continuing with our multidisciplinary work with WIMU; last days we had the opportunity to work in an always exciting and challenging sport: cycling.


For this discipline, there are multiples parameters used for monitoring and follow up for both the cyclists and the bicycle. We are talking about: speed, heart rate, cadence, pedal power and…  muscle oxygen saturation (SmO2).
Those are just a few of the many available parameters.

Each parameter gives value information. It’s a practical tool for the athlete and his coach when they are facing training to improve the performance.  Never the less, it’s the fusion of all those parameters the real high value. When you can have synchronized metrics such as impacts, bike and cyclist inclination, rotation speeds, accelerations or oxygen consumption in each leg; is when you are dealing with High Performance and an authentic Smart Training.
This fusion of sensors (internals and externals) is what makes WIMU unique to plan and analysis the physical training.

Without any doubts, pedal power is a huge advance to train at the correct intensity in each moment. If you add muscle oxygen saturation, it’s possible not just to have the muscle work, but how that work is affecting it.

Training based on power allows to analysis quality of the workout; without taking in concern facts such as weather conditions or the field. Adding the SmO2, we can know how much it takes to full muscle exhaustion and recovery time.

The following session of Mountain Bike (MTB); recorded in the most deserted and widest places of Almeria; we can see the mountain-climbing to Baños de Sierra Alhamilla.

The last part of climbing is very demanding. The ground is full of tiny stones. It makes very difficult to have some grip. In just 3 km (2 miles), you gain a height of 200 meters (650 feet).

It’s definitively, a high intensity situation for the cyclist. In this Wimu session, the cyclist also wore cadence sensor, heart rate and two Moxys (for the SmO2), each one placed in the same position of each quadriceps

A quick glance of the main results indicates us:

–       Since the beginning, we observe a similar behavior of SmO2 average (for both legs). But right leg % of oxygen started to be under left leg. It was due the cyclist was doing a higher push with right leg, so he was consuming more oxygen in that quadriceps.

–       Heart Rate moves in a opposite direction than Sm02. When saturation drops it’s because the effort that muscle is doing. It also produces a rising of the beats per minute (the RR or pulse time, drops).

–       Recovery time after max effort (and for each leg) is the same (the HR drops until the same value at the beginning).

–       Minimum SmO2 was 38% and HRmax was 182bpm.

–       Biggest impact received (wimu was place at the bike frame) was 12G, when the cyclist was coming down at 29.9 km/h (18.58 miles/h). Probably it was due to a bump with a stuck stone in the ground

–       Distance: 33 km (20.62 miles); max speed 50 km/h (31.07 miles per hour); average speed 16.6 km/h (10.375 miles/h) and average heart rate 148bpm.


Here you can find screen shots of the data collected by WIMU and the external sensors, with special focus on moxy sensors. Once again, synergy between Wimu + Moxy has a lot to bring to the cycling.

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