Casio G-SQUAD GBD-H2000 – “Powered by Polar”
More: Casio H2000 on Amazon
The partnership between Casio and Polar is marked by the release of the Casio G-SQUAD GBD-H2000 watch, featuring the “Powered by Polar” brand. Polar now licences its physiology algorithms to Casio, giving the watch brand access to 25 algorithms covering sleep, training, wellness, activity, performance, and recovery. This collaboration will benefit both companies, with Polar expanding its market and Casio providing users with a well-respected suite of training and recovery metrics.
The Casio+Polar collaboration focuses on 5 key measures; Running Index, Training Load Pro (incl HR Zones, Cardio Load & Cardio Load Status), Energy used, and NIGHTLY RECHARGE.
Running Index measures your running fitness level, calculated by Polar’s VO2max formula and is best targetted as an upward trend over time rather than a daily metric
Energy used during a workout indicates the energy source powering the body and provides insight for athletes and dieters alike, both of whom will probably be aiming to use a high proportion of fat as an energy source.
Cardio Load assesses the strain on the body during exercise based on heart rate, workout duration, and intensity. Cardio Load Status evaluates accumulated load and fatigue over time, offering insight into the current training status.
Next, the partnership measures recovery from the strain of a workout by evaluating overnight heart rate variations and their impact on the body’s nervous system. Advancements in sports science and technology have enabled watches to provide insights into the effectiveness of a night’s sleep. Also covered here are Polar’s Sleep Stage Metrics (Sleep Plus Stages)
Finally, the Serene Breathing Exercise is added.
Opinion
This is a great move for both companies. Presumably Polar makes some money out of the licencing fees but it also gains exposure to a whole new kind of customer plus the credibility of linking with a well-known brand like Casio.
Casio, on the other hand, gives its products the credibility of algorithms that are ‘correct’ and proven. Then, providing Casio’s sensor data is good, its customers will benefit from several leading-edge physiology metrics typically only available on more sports-focussed watches.
This move from Polar makes me wonder if the likes of WHOOP could similarly licence its algorithms.
More: WHOOP band detailed review and critique
https://the5krunner.com/2025/10/31/2026-whoop-5-0-mg-review-discount-accuracy-strain-recovery-athletes/
Last Updated on 27 January 2026 by the5krunner
My favourite kit and nutrition
- Maurten — the race nutrition trusted by elite athletes. Gels and drink mix engineered to be easy on the stomach.
- Garmin 90-degree charging adapter — the small adapter that keeps your charging cable tidy at the stem. Essential for race day.
- Garmin charging puck — the fastest and most reliable way to top up your Garmin before a session.
- Ravemen FR300 — front light that mounts directly under your Garmin or Wahoo head unit. Keeps your bars clean and your beam pointed where it matters.
- Garmin Varia RTL515 — radar rear light that alerts you to vehicles approaching from behind. Pairs with your Edge or Garmin watch.
- Stryd — the footpod that brings running power to your Garmin. The single most useful running upgrade I have made.
- Favero Assioma Pro RS2 — the power meter pedals most serious cyclists end up choosing. Accurate, easy to move between bikes.
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tfk is the founder and author of the5krunner, an independent endurance sports technology publication. With 20 years of hands-on testing of GPS watches and wearables, and competing in triathlons at an international age-group level, tfk provides in-depth expert analysis of fitness technology for serious athletes and endurance sport competitors. ID
AND WHO THE *&^$ NEEDS ALL THIS SHIT , HEART ACTION, SLEEP MINITORING, CALORY BURNING . DO THE “£$% DECENT OUTDOOR WACH FOR ONCE, WITH BODY , AND OUTDOOR TEMPERATURE, ALTITUDE, ATMOSPHERIC PRESSURE, REAL GPS , SPEED O METER , MAPS , TOUCH SCREEN. WITHOUT IDIOTIC STEPS COUNTER AND OTHER JUNKS FOR NERDS- IDIOTS !!!
(edited by tfk to remove the very naughty words ;-))
Nerd
i probably agree with your sentiment but not your delivery 😉
to be fair to Casio, these Polar features are proper sports-level features.
Go see a doctor mate
Hahahah, it’s a pile garbage
Wow, man! You obviously are not having a good day! ????
Tudo bom! Quem quer e precisa ou gosta compra, aos outros, meus caros cada qual ás suas e sem stress.
Translation: “All good! Whoever wants, needs or likes to buy, to the others, my dear, each to their own and without stress.”
I like it. Definitely not designed for the fat couch potato in mind designed for the outdoors person with a healthy conscious mind who enjoy the outside. My personal opinion.