It’s time to switch things up.

Introducing MZ-Switch, world's first interchangeable heart rate monitor.

Discover three ways to up your game with the world’s first heart rate monitor that you can wear on your chest, arm or wrist, even when swimming.

Wearable 3 ways. 3x the motivation. 3x the fun.

Exclusive 25% discount for Fitness First members and 10% discount for non-members

Visit your nearest Fitness First club and wear it your way with the new MZ-Switch.

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MYZONE Users’ Benefits

  • Exercise inside and outside of the club and have your activity recorded.
  • Log in to the user account online anywhere and track their activity and progress.
  • Earn MEPs for every minute of physical activity. (Inside and outside of the club)
  • Participate in challenges based on physical activity and measure results.
  • Achieve goals by utilizing heart rate intensity feedback.
  • Wear it the way you like on your chest, arm or wrist.
  • Take control of your workout.* Start and stop tracking whenever you like. 
  • Don’t miss a beat. Track your fitness everywhere even under water.
  • Know your zone instantly through a flashing indicator light.*
Switch Watch
Light Bar

SEE YOUR ZONE WITHOUT A PHONE A new light indicator on the MZ-Switch means that you can see which zone you’re in without breaking your flow. Wear on your arm to work out phone free.



It monitors heart rate, calories and time spent exercising that converts into MYZONE Effort Points (MEPs), with a focus on rewarding effort rather than fitness. MYZONE users simply wear a comfortable MZ-Switch on their arm, chest or wrist, which is registered online, to monitor all concerted physical activity in real time, allowing users to view their progress in their personal account. It enhances enjoyment of physical activity by providing personal, colour-coded guidance and motivational feedback both inside and outside. Compare your stats online or share them with your other fitness apps. Let's Make Movement Measurable!


Measure. Earn. Progress.

Meet the all-new MZ-Swtich – your new workout partner. The MZ-Switch is a heart rate monitor that allows you to track intensity during physical activity even underwater and watch live stats using your mobile device. Measure your effort and intensity level on a minute-by-minute basis and challenge your friends to compete with you. Different skill levels? No problem. MYZONE® has a unique point system (MEPs) that rewards you based on how hard you work. Choose your favorite activity and compete regardless of age or previous experience, leveling the playing field! No longer are you tied to just being able to track a run or a bike ride – track everything from the treadmill, group fitness class, a run outside or a swim in the sea or a pool.

Track Your Workouts Accurately

It's as easy as 1, 2, 3! The MZ-3 tracks your heart rate, calories burned and displays this information right on an iPhone or Android device. Let your heart be your guide and continue to track your workout intensity, maximize training and optimize your health! All statistics are personalized to you, using your age, height, gender and weight to provide you an accurate way to track your workouts.



Now anyone can monitor and earn Myzone Effort Points (MEPs) for every single type of physical activity thanks to the integration of both ECG and PPG sensors. This means that reaching the World Health Organization’s Guidelines for Physical Activity (which equates to 1300 MEPs per month) is more attainable than ever.

MYZONE Tile info layout

Anatomy of a MYZONE Tile

The MYZONE® MZ-3 belt links with your cellphone via Bluetooth to display live, accurate workout information. This information is personalized to you – based off your unique age, height, weight, and gender information. This is the technique needed in order to provide accurate workout measurements. Track your current effort level (color & percentage), your calories burned, and your total MEPs (MYZONE® Effort Points) earned!

Myzone® Effort Points (Meps)

MYZONE Effort Points (Meps)

Reach new heights! MYZONE's® app measures your performance in MEPs. MEPs are a proprietary MYZONE® reward system that awards points for every minute of physical activity. MEPs are displayed in grey, blue, green, yellow or red levels based on total work out exertion. Earn more points based on your intensity level or stay within certain ranges to reach your goals by maximizing your training efficiency. Stream to Apps and Equipment

Train smart! The MZ-3 automatically streams your heart rate to enabled cardio equipment, such as the treadmill, elliptical machine, cycling bike, and rower. Having your heart rate displayed on workout equipment allows you to optimize training efforts and benefit from smarter workouts. Additionally, the MZ-3 streams via Bluetooth to the MYZONE® App and works well with third-party fitness applications. MYZONE® helps make you ready for every aspect of fitness!

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Stream to Apps and Equipment

Train smart! The MZ-3 automatically streams your heart rate to enabled cardio equipment, such as the treadmill, elliptical machine, cycling bike and rower. Having your heart rate displayed on workout equipment allows you to help optimize training efforts and benefit from smarter work outs. Additionally, the MZ-Switch streams via Bluetooth to the MYZONE® App and with third-party fitness applications. MYZONE® helps make you ready for every aspect of fitness!

Download MYZONE App

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Set Goals and Compete

Challenge your friends! Make fitness challenges and competitions with friends or fellow gym members. MYZONE® offers a complimentary fitness performance tracking site and mobile application with social functionality, which allows you to establish unique training goals and competitions. If you prefer to achieve individual goals, use the MYZONE® site and mobile application for tracking elements to develop personal fitness goals and push yourself forward.


Frequently Asked Questions

Used on the wrist or forearm, the MZ-Switch uses an optical blood flow sensor. This shines a light into your skin using LEDs that measure the volumetric variation of your blood flow to predict your heart rate. . When worn on your chest, the black sensors on the strap read your heart rate via electrocardiogram, or ECG, which traces the electrical activity of the heartbeat.

To maintain your status ranking and keep your workout history on the same account, you will just need to edit your belt ID on the Myzone app.  Go to: Settings > My Profile > Belt ID.


Wrist: Slide your hand through the loop and pull the strap to tighten against your skin. The module should be positioned two fingers above your wrist bone.

Forearm: Slide your hand through the loop and position it just beneath the elbow with the module facing out.

Chest: Place the strap around your body. Snap the module onto the strap and position the module on your sternum with direct skin contact. Wet the black pads for better heart rate conductivity.

Whatever location you choose, always ensure the MZ-Switch is comfortably snug against you. 

Wrist: Use for non-gripping activity and repeatable movements, including swimming.

Forearm: Use for improved accuracy during non-gripping activity and repeatable movements, except swimming.

Chest: Use for the most accurate readings during all types of exercises, except swimming.

Press and hold the button on the module until you hear one beep and see the green LED to signify the module has turned on and is reading your heart rate. After completing a workout, press and hold the  button again until you hear three beeps which signify the module has turned off.

Please note, only press the  button on and off when MZ-Switch is on your wrist or forearm.

To activate on the chest, moisten the black sensors on the back of the chest strap and tighten appropriately around your chest.  Listen for the single beep to indicate that the MZ-Switch is reading your heart rate. The power button will not work in this location--it will only activate when the ECG sensors pick up your heart rate.  After your session, remove the MZ-Switch from your chest. You will hear 3 beeps when the module has turned off. 

No – don’t forget! Make sure to listen for the three beeps to signal your module has turned off after your workout. If your battery does run out, it’s a quick charge before you’re back in the game with three to six months of battery life again. In addition, the Switch can store up to 30 hours of exercise data.

The light on the front of your Switch module lets you know what zone you are in as you work out. This flashes when used on your wrist or forearm. When worn on the chest, the light remains off to preserve battery life.


To extend battery life, you can set your module to flash your zone only when you raise your wrist. To enable this feature, go to Settings> Preferences> Toggle Hand-Up Display on.

Snap the USB charging cable to the back of your MZ-Switch. A light will pulse red to indicate charging. Once fully charged, the light will turn solid green. Use a 5-volt adapter; do not use a 9-volt adapter as it will damage the module. 

When you press , you will see a battery light indicating the following:


Your MZ-Switch battery will last 4-6 months depending on use, care, and location. When worn on the wrist or arm, up to 40 hours of battery life, and when exclusively worn on the chest, up to 140 hours of battery life.

You will receive a pop-up notification in the app when you dip below 20%. You can always check your charge level on the Workout screen. No need to connect your belt--the app memorizes the charge level from the last time your belt was synced up. 

Yes, you can wear your MZ-Switch with your smartwatch. Please visit these articles for help pairing to your device:

Apple Watch: How to Pair and Upload Workouts. 

Samsung Watch: How to Pair and Upload

Yes, when you are not streaming live to your app or in-club display, you can store up to 36 hours of exercise data. You can upload stored data through the Myzone app or in-club display. Your belt must be activated for the app to pull your workout from the module to your account. 

The straps are washing machine-safe on the gentle cycle in cold water. To improve longevity, hand wash. Always air-dry--do not place in the dryer. We recommend replacing your straps after sustained periods of regular use. 

Yes, the MZ-Switch is waterproof up to 10 meters and is the first Myzone product to track your MEPs while swimming! Wear the MZ-Switch on the wrist during swimming, surfing, paddleboarding, or water aerobics.

The MZ-Switch was designed without an analog chip in so that you can benefit from features such as 36 hours of internal memory, dual-Bluetooth, and a smaller module size. Analog was also removed to eliminate "cross-talk".

For example, if you’re wearing your belt and walk by someone who was on a machine, your belt might be picked up during their workout. More and more machines are being created without analog in favor of Bluetooth and ANT+ for this reason.

Yes, in fact, because of the dual-channel Bluetooth, you can now sync up to both your Myzone app and your watch, Peloton, or other Bluetooth devices with no problems.

No, there is no pause option.  The on/off button applies exclusively to the wrist and forearm. This is activated when you press and hold the module. The chest option turns on when the module detects your HR via the ECG sensors on the strap; the power button does not work for chest use. 

Yes, you can switch from arm to chest and receive 1 cohesive graph as long as there is not a 10-minute break between activities.

Yes, please place it on your wrist or arm. Medical devices may interfere with the chest strap. Always consult a medical professional before starting a fitness regime. 

We always say that, for the most accurate heart rate measurements, use the chest strap for ECG readings. The wrist and arm results are measured via PPG technology, rather than ECG. PPG estimates your heart rate based on your pulse, while ECG traces the electrical pathway of your heart. PPG is approximately 95% accurate, whereas ECG is over 99% accurate.

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