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PREGUNTES FREQÜENTS

Product Overview & General Use

Parameter

Unit

Typical range

Refresh rate*
Heart rate (ECG)

bpm

40 – 220

1 s
Sweat rate

mL · h⁻¹ [L]

200 – 2000 (0 – 3)

15 s
Sweat loss

L

0 – 3

15 s

Sodium (Na⁺)

mM

20 – 80

30 – 40 s

Sodium loss

grams

0 – 5

30 – 40 s

Sweat-inferred lactate

mM

1 – 25

60 s

Dehydration estimate

% body-mass

0 – 5 %

15 s

Note: Sweat biomarkers only appear once sweat reaches the sensor, approximately 5 – 10 minutes into exercise.

  • Heart Rate Mode: The strap is used to monitor heart rate through an ECG signal, but no sweat data is collected.
  • ONAS10 Mode: Requires both the strap and sweat decoding card ONAS10; full biomarker tracking enabled.
  • Recommend Heart Rate Mode for casual sessions; ONAS10 for complete data sessions.

Feature

Heart-Rate mode

ONAS10 mode

Sensors active

ECG strap only

 ECG strap + sweat decoding card ONAS10

Data available live

HR

HR, all sweat biomarkers

Battery impact

 ≈ +35 % longer run-time (no sweat decoding card ONAS10)

Full run-time (≈120 h)

Typical use-cases

Pure HR tracking, day-to-day conditioning, and an indoor bike

Everyday training, Race Day, lab lactate replacement, hydration planning

  • Traditional wearables (e.g., Garmin, Apple Watch, WHOOP) track only external or conventional vital sign metrics, such as heart rate, movement, and GPS. Instead, ONASPORT tracks biochemical markers based on sweat, such as lactate or sodium levels.

  • As heart rate data is also provided, a whole profile of biomarkers related to the internal load of the athlete can be built. Furthermore, these biomarkers are provided continuously and remotely, converting them into useful digital biomarkers not offered by any other wearable platform currently.

ONASPORT works best when the body produces a continuous sweat flow for at least 20 minutes. We can monitor all kinds of people, irrespective of the amount of sweat they generate.

Ideal scenarios:

  • Endurance sports like

      • Running (road running, trail running, track running)

      • Cycling (Road cycling, Gravel cycling, MTB cycling)

      • Triathlon

      • Nordic skiing

  • Field and court sports, such as soccer, basketball, rugby, and tennis, where coaches track multiple athletes.

*Recreational athletes can still benefit, provided they meet the minimum session length and sweat production requirements, which is around 30 minutes.

Less suitable:

  • Cold weather (<10 °C) with short bursts, where sweat never forms a film.

  • HIIT and CrossFit-style sessions.

  • Gym training and short session sports.

  • Sprint events under 2 minutes where biochemical lag makes feedback less actionable.

  • Users with implanted pacemakers or ICDs (consult your physician first).

What's in the Box

  • Only one session. ONAS10s interact with your sweat directly for measurements, which can distort any new measurements performed in subsequent sessions. Besides, the adhesion to both skin and the ONASPORT device can be compromised. Therefore, reusing a card implies inaccurate readings and cross-contamination.

  • After each session, remove the card by pressing the side latch, let any residual sweat drip off, and dispose of it with regular household waste. (The polymer is fully RoHS-compliant and contains no heavy metals.)

ONASPORT runs on a standard CR2032 3V lithium coin cell (225 mAh nominal):

  • Typical life: 130 hours in ONAS10 mode; 210 hours in Heart Rate (HR) mode; 270 days in sleep mode.

  • Replacement: Twist the battery cover ¼ turn counterclockwise using the supplied tool, ensuring the “-” polarity faces upward. Then, twist it back to secure it in place. A gentle click confirms proper seating.

  • Safety: Coin-cell batteries can be harmful if swallowed. Keep spares and used cells out of reach of children and dispose of them at designated battery-recycling points.

Absolutely. Consumables and wear items are stocked in the Onalabs web store and by authorised distributors:

Part

Pack sizes

Typical replacement interval

ONAS10 cards

4-pack

1 per session

Elastic chest strap

Single

6-12 months or 150 washes

Battery-cover opener tool

Single

Only if lost*

If you lose the battery cover opener, please contact support to request a replacement.

Bulk packs qualify for discounted shipping; team and clinic customers can request a purchase-order quote. ONAS10s ship with a shelf life of 3 months (if they are not conserved in controlled conditions).

App & Technical Requirements

The app is available free of charge in the official stores:

Platform

Direct link

iOS

apps.apple.com/app/onalabs-onasport

Android

play.google.com/store/apps/details?id=com.onalabs.sport

Side-loading is not supported; installation from the official stores ensures you always get the latest firmware bundles and avoids malware-infected clones.

To guarantee Bluetooth® Low-Energy stability and the latest security patches, we support:

OS

Minimum version

Recommended

iOS

15.5

17.x or later

Android

12 (API 31)

14 or later

Devices running older OS versions may be able to install the app, but they will encounter issues such as failed pairing or interruptions to background sync. Firmware updates are blocked on unsupported OS to prevent corrupted transfers.

Feature

Needs internet?

Details

Log-in/account creation

Yes

Initial authentication via secure API

Starting a session & live metrics

No

Everything runs on-device and over BLE

Firmware update

Yes

 Files downloaded from Onalabs CDN

Cloud backup/coach live view

Yes

Data syncs once Wi-Fi/LTE returns

Export to CSV

No

File saved locally; can be shared later

If you begin a session offline, it will never be online (coach available). If you start the session online and then lose your internet connection, it will resume sending data online again once you recover your connection. The moment your phone reconnects to the internet, the backlog uploads automatically, and your coach dashboard fills in. The lost data will only be sent at the end of a training session.

Initial Setup

Creating an account allows you to unlock all the ONASPORT features.

  1. Install the ONASPORT app and tap Create account.

  2. Scan the QR code on the back of the box to access the Registration code.

  3. Enter first/last name, email, sex, date of birth, weight (kg), height (cm), country, email id, an 8-character password (must include 1 uppercase, 1 lowercase, 1 number, and one symbol), and confirm the password.

  4. Read and accept the Informed Consent and Privacy Policy checkboxes.

  1. Enable Bluetooth (on iOS and Android) on your phone.

  2. Open the app → Start training; the ONAS10 appears within ~5 s.

  3. Tap the sensor tile → Pair

  4. If “Firmware update available” appears, tap “Update now.” Keep the phone within 3 meters and the screen awake.

  5. A progress ring displays 0% → 100%; the device reboots, and the app shows “Firmware update successful.”

 

Troubleshooting: If the update stalls for more than 10 minutes, force-quit the app, reopen it, and then repeat the update process. Remove the battery for 30 seconds only if the device is unresponsive.

  1. Wash your hands and open the plastic packaging just before training.

  2. Remove the protective covers from the sensors, located at the bottom of the ONAS10.

  3. Hold the ONAS10 with the arrow up and facing the strap.

  4. Slide the card into the slot until you feel and there is a visible mark – this closes the spring latch and seals the micro-channels.

  5. A colour mark indicates the ONAS10 is fully inserted.

  6. Do not remove the card mid-session; doing so irreversibly stops sweat data collection.

Tip: Keep the packaging with you in case of a problem with any ONAS10s while inserting.

  1. Place the battery in the device using the opener provided. Make sure the positive side (+) of the battery is facing up while inserting the battery.

  2. Remove the protective cover from the sensors located at the bottom of the ONAS10.

  3. Slide the ONAS10 onto the ONASPORT device.

  4. Peel off the skin protective cover.

  5. Open the app → Start training → Fill in all the information about User Data, Measurement Mode and Activity Type

  6. Warm up for 5-10 minutes – this helps activate your sweat glands.

  7. Add a water droplet carefully using your finger on the ONAS10 inlet. (Make sure to press the ONAS10 card directly to your skin)

  8. Hit Start before warmup; HR appears immediately, and sweat fields show “––” until the channels fill (~ 5-10 minutes).

  9. After training, press Finish → Save, and a green cloud icon shows successful upload.

Remember: Removing the card or battery mid-session permanently ends sweat data collection for that session. Start a new one if this happens accidentally.

Training & Device Use

Sweat-based parameters require activation time: the micro-channels inside the ONAS10 must be filled before the electrochemical sensors can read them. To activate it, follow the instructions:

  • First, finish pairing the device with your ONAS10.

  • Next, tap a small droplet of water into the ONAS10 inlet with your fingertip; activation typically starts within 5 – 10 minutes.

  • Finally, launch your workout with a warm-up.

Remember: Adding too much water to the ONAS10 inlet can lead to filling the channel and shortening the duration of the ONAS10’s performance.

Prerequisites

  • Supported Garmin models: Forerunner, Edge, Fenix.

  • Update to the latest ONASPORT App and device firmware.

1) Download the ONASPORT Data Field

  • Open the Garmin Connect IQ Store.

  • Search “ONASPORT” → Install and accept the terms.

2) Configure the Data Field

  • Open the Garmin Connect IQ app on your phone.

  • Go to My Device Apps → ONASPORT → Settings → Connectivity.

  • Tap Name and enter your device’s advertising name in the format ONASXXXX (case-sensitive).

    • Find this on the box label or engraved on the device (top-right of the back).

  • Note: Only the device you add here will connect to Garmin.

3) Sync to your Garmin

  • In Garmin Connect, press Sync with your watch/cycling computer nearby and connected.

4) Add the Data Field to an activity

  • On your Garmin: Activities → Activity Settings → Data Screens.

  • Add New Screen → Custom Layout → choose a full-screen layout (required).

  • Select Connect IQ → ONASPORT.

Start your activity on Garmin and a session in the ONASPORT App, full sweat & performance metrics will show live, and the complete dataset will sync to the App after finishing.

  1. Garmin: full ONASPORT metrics (recommended)

    1. Update the ONASPORT App and device firmware.

    2. Install the ONASPORT Garmin Data Field from Connect IQ and add it to your activity profile.

    3. In the ONASPORT App: Start Training Session → complete athlete/data → choose measurement mode → select your device → tap External Device.

    4. On your Garmin, start the activity. You’ll see full ONASPORT metrics (biomarkers + HR) on the data field in real-time.

    5. Finish: end the activity on the watch; in the App, be on the live screen (rejoin if needed) and tap Finish to sync & save all data.

    Note: Garmin does not pair ONASPORT as a standard HR sensor—use the Data Field method for live biomarker display.

    Other devices: heart rate broadcast (biomarkers saved to App)

    • Start the session in the ONASPORT App (External Device) so the device records all biomarkers.

    • On Suunto: pair as HR sensor (Settings → Connectivity → Pair Sensor → HR Sensor).

    • During the session Suunto shows HR live; after, Finish in the App to sync full data.

  1. Absolutely:

    • Even if you are not connected to your phone, ONASPORT still retains all your training data. You need to start the training session on your phone, leave it behind, and only bring it with you if you want to check the live data.

    • Once the phone reconnects (e.g., at the café stop or back in the locker room), all queued data syncs within 30 seconds, then uploads to the cloud if you’re logged in.

    • On the session list, a green dot indicates that the file has been uploaded to the cloud; a red dot means it’s still only on the phone—tap Sync to retry.

    Caution: If you finish the session while the phone is offline and has no internet connection, any unsynced data will be saved in the phone and can be retrieved whenever you press sync. Whereas, if you finish a session while the phone has lost the Bluetooth connection, any unsynced data will be lost.

Yes, each athlete pairs their device to their phone:

  • Pairing discipline: Ensure only one phone has Bluetooth scanning enabled during each athlete’s pairing step to prevent cross-bonds.

  • Coach view: The web dashboard lists all athletes and displays their live or finished sessions once each sensor is assigned to them in Devices ▸ Metadata ▸ Assign Athlete.

  • If an athlete borrows a spare sensor, the data will only be uploaded to the cloud if the coach has reassigned that device before starting the session.

  • Warn athletes that even though multiple BLE pairings are supported, the device can only be connected to one phone at a time.

Currently, it is not possible to pause or resume a session.

The device detects poor contact and shows “Check the ONAS10 fitting”, from that moment:

  • Sweat-based metrics stop updating and will show the latest value for the rest of the session.

  • Heart-rate data continues normally.

  • Do not re-insert the same card, as once unsealed, it’s contaminated.

  • Finish the session and record HR-only metrics.

  • If the connection has worked for some time before losing contact, collect the metrics that have been updated till the connection is lost.

Dispose of the used card in the general waste bin, as the polymer is RoHS-compliant.

Data & Visualization

  1. Open the app → Training History tab and the newest recording is displayed at the top.

  2. Tap the session card to open the Summary view:

    1. Header tiles – Cloud syncing, Session type, Measurement mode, Activity type, Device number, Date and Time of activity start, Duration of training, Sweat Lost (in L), and Sodium lost (in g).

    2. Interactive graphs – swipe down to switch between sweat inferred lactate, heart rate, sweat rate, sweat loss, sodium, sodium loss, and dehydration. Long-press to place a cursor.

  3. Option of exporting the session in CSV format at the bottom of the screen.

  • At the end of the session summary, tap Export → choose CSV.

    • CSV – raw 1 Hz rows; the header row explains every column.

  • File names follow the pattern onasport-YYYYMMDDhhmmss.csv, allowing them to be sorted by date.

  • You can share directly to email, Drive, or Dropbox.

  • Coaches on the Onalabs Athlete Portal can bulk-export the resumes of all athletes at once.

Aspect

Cloud session (green dot)

Local session (red dot)

Account required

Yes

Yes

Internet required

Only at session start and finish (upload)

Never

Firmware updates

Enabled

Enabled

Coach live view

Yes (only if internet is available)

No

Export formats

CSV only

CSV only

Data retention

Onalabs servers (EU, AES-256)

Your phone storage

Switching a red-dot session to the cloud later is as simple as tapping ‘Sync‘ (only if the session was started with an internet connection and a linked device). Unsubscribing or deleting your account will erase cloud copies within 30 days; local files will remain until you manually delete them.

The sweat decoding card ONAS10 utilises a lactate sensor to detect sweat-inferred lactate.

  1. Sweat enters the sensor and flows across the channel until it reaches the lactate sensor.

  2. The lactate ions in sweat interact with lactate oxidase, which is deposited in an electrode layer.

  3. This reaction produces a byproduct that can be measured as an electric current.

  4. A trained model transforms the sweat lactate value and other biomarkers like heart rate and sweat rate into the delivered sweat-inferred lactate.

  5. This value is used to monitor the internal load and to identify inflection points in guided incremental protocols.

Coach & Group Features

  1. Assigning a sensor’s serial number to an athlete account allows new sessions to upload to the cloud (green dot), although old local sessions won’t be changed to the cloud.

    Dashboard workflow 

    1. Open Devices in the sidebar. 

    2. Click the device row → Metadata tab. 

    3. Press Assign athlete → tick the correct name → Save. 

    4. The athlete can now start cloud sessions immediately.

Coaches can monitor their athletes in real time through two platforms: Onalabs Athlete Portal and the Web Dashboard. Both platforms display real-time data, provided that the user has established a connection between the ONASPORT device and their phone, and the phone is connected to the internet.

Main differences:

  • Both platforms display graphs for the 6 biomarkers: Heart Rate, Sweat Loss, Dehydration, Sodium, Sodium Loss, and Sweat-Inferred Lactate.

  • Both provide information on the users and devices assigned to the coach

  • Only the Onalabs Athlete Portal allows the creation of new users linked to the team

  • Both platforms allow linking and unlinking devices to/from users.

  • Only the Web Dashboard offers in-depth session analysis, including features like overlaying measurements, assessing session metrics, viewing athlete recaps, etc., and allows integration with external platforms (e.g., Garmin)

To monitor a live workout in the Onalabs Athlete Portal:

  1. Log in at: https://organization.app.cloud-onalabs.com

  2. Click Users.

  3. Select the athlete and press Expand.

  4. Go to Training Sessions and click on the current session.

  5. Press Expand again and click See Measurements in the top-right corner.

  6. Click the icon in the bottom-right corner of any measurement to view the latest data.

To monitor a live workout in the Onalabs Athlete Portal:

  1. Log in at: https://app.onasport.onalabs.com

  2. Click Athletes.

  3. Select the ongoing training session.

  4. Refresh the page periodically to see the latest measurements.

Yes. Currently, CSV export is the only way you can share data. Check the following table for more information:

Method

What’s shared

How

Use-case

CSV export

Any session

Session Summary → Export

Import into Excel, etc.

Yes

Battery & Maintenance

  • Typical life: Around 130 hours in ONAS10 mode and 210 hours in Heart Rate (HR) mode on a fresh CR2032 lithium 3 V coin cell.

  • Stand-by: < 2 % than training in sleep mode so that it could last up to 270 days.

  • Low-battery warning: When the voltage drops below 2.4 V, the app displays the message “Replace battery.” You still have 2 hours of runtime to complete the current workout.

  • Wipe-down: Damp cloth, no alcohol or solvents; avoid water ingress into the sweat connectors.

  • Drying: Remove the sweat card first. Let the sensor air-dry at room temperature – never use hair dryers or heaters.

  • Magnet caution: Keep away from strong magnets (such as speaker grills) that could interfere with the ECG input.

  • Storage: A cool, dry place, 0–40 °C. Store the device separately from the strap to allow for complete evaporation of moisture.

Range

Recommendation

Possible impact

-20 °C – 10 °C

 Warm up longer to form sweat, but battery capacity is shorter.

HR OK; sweat activation slower.

10 °C – 60 °C

Full spec; no restrictions.

–

> 60 °C

Not allowed (saunas, steam room, inside a parked car in summer, cryotherapy).

–

For cold races, keep the sensor under a jersey until just before the start. For desert events, let sweat evaporate naturally; do not douse the strap with ice water, as this risks electrode flooding.

  • Location: Any dry, dark, and cold place.

  • The sweat cards expire 3 months from the production date, as indicated on the package.

Account, Security & Legal

  • Our data repository platform, which has all the health regulatory standards, safely holds all the sessions.

  • Passwords never leave the phone in clear text and must adhere to the minimum complexity rules enforced at sign-up (≥ 8 characters, including upper, lower, number, and symbol).

  • Onalabs never stores card numbers. We collaborate with suppliers who, in turn, are responsible for storing this information.

Role

Can view

Can edit / export

You (Athlete)

 All of your own sessions

Yes

Assigned Coach

 All of his athletes’ sessions

Yes (export)

Admin

 All athletes in the organisation

Yes
Onalabs Support Read-only, with user consent

No permanent copy

Assignments are managed under Devices ▸ Metadata; a sensor must be tied to a specific athlete before sessions can flow to that coach’s dashboard.

  • The profile and cloud files are queued for erasure; the purge will be completed within 30 days (GDPR Article 17).

  • Sessions stored locally on any of your phones remain until the app is deleted or you manually remove them.

  • Files already exported (CSV) or shared with coaches are outside Onalabs’ control. Coaches are instructed to respect your deletion request but must remove those copies themselves.

  • The device itself is unaffected; you can pair it to a new account at any time.

Channel

How to reach it

Typical response-time

What to prepare

E-mail support

 support@onalabs.com

24 hours

Attach photos (device, error screenshots),

In-app “Support” shortcut

Home screen → ︙ Settings ▸ Support

24 hours

Attach photos (device, error screenshots),

Phone hotline (EU only)

Contact details are on the app

Immediate

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