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Summary:

Did you know one of the best race result predictors is your lactic threshold? The BSX Insight is a wearable device that measure and track the buildup of lactic acid in your muscles and determine your lactic threshold.

BSX Insight

As a competitive runner, I’m always on the lookout for new wearables that provide insight to my training. BSX Athletics, a Houston-based company that provides cloud-based training plans fits the bill with its Kickstarter project for the Insight: A wearable device that measures lactic acid in your muscles along with heart rate, pace and cadence when running or biking.

BSX Insight main

Unlike many other health wearables, the Insight doesn’t go on a wrist. Instead, you wear it near your calf in a compression sock. The Insight then sends data wirelessly to a sports watch using the ANT+ protocol. Currently, ANT+ doesn’t have a standard way to send lactic acid information, so the team at BSX has created a bit of a hack. They are working on getting the standard updated, however.

I typically use a heart rate monitor to manage my exertion levels when running, and the data from that helps me create different training zones. It’s a great indicator of how hard or easy I’m working out during a run, but it doesn’t directly measure my lactic threshold the way the Insight does.

To make a long story short, your lactic threshold is that moment during a workout where your body can’t flush lactic acid out of your bloodstream faster than it is being produced. It contributes to that muscle ache or burn that makes you legs feel heavy when running, for example. Here’s a fuller explanation of the lactic threshold, which varies by person and even varies in a single person as they get in better — or worse — shape, as well as how the BSX Insight works:

At time of writing, the BSX Insight has raised $21,208 of its $50,000 funding goal and has 30 days to go. Early bird deals for a BSX Insight plus six months of BSX training access for $179 are still available; the MSRP will be $249 for that package.

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  1. johnnydajogger Wednesday, March 12, 2014

    Will this work with a mac and a garmin 305? Can I suggest a workout (i.e. 15X300m) to the BSX device and then it will alert me as to when I hit the lactate threshold? Can you refer me to articles which discuss how I can make practical use of this info during training or a race? Thanks

    1. Johnny –

      BSX Insight is equipped with both ANT+ and BLE communication stacks. This allows it to communicate with any ANT or low energy bluetooth enabled device including sports watches and even phones (for example new Samsung Galaxy and Note phones have built in ANT antennas).

      Most watches on the market today use ANT+ (it has become the defacto standard for wireless transmission of sports data) including Garmin, Timex, Suunto, etc. I’d recommend checking with the watch manufacturer to make sure they use ANT and if they do, it will pair.

      As for your use case, you’d likely use the device to determine your training zones, then use those to build your workout.

      Here’s a good piece from Runner’s World on lactate threshold training:
      http://www.runnersworld.com/workouts/full-spectrum-lactate-threshold-training

      Hope that helps!

  2. Since I’m not a runner – can you tell me how actionable this is? Is this something that you’d be monitoring while running or is this purely something you’d look at after a run?

    1. From what I understand on the Kickstarter page , it pairs with your watch to give you real-time feedback on your training paces.

      “Through paired communication with your sports watch it lets you know, in real-time, whether to speed up, slow down, or even rest. BSX Insight is best used both during training as well as on race day to help you finish your perfect race. With BSX Insight you are sure to get the most out of every mile, every time.”

      Seems pretty simple if you ask me. I can relate with ‘speed up’ reminders!

  3. David McCormack Thursday, March 20, 2014

    Great idea…but you gotta wear it inside a compression sock!? That might work for the runners and triathletes but not for any self-respecting road cyclist :) In fact, the governing body for road cycling here in Ireland has just recently banned racing cyclists from wearing compression socks during competitive events!

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