The best fitness watch depends on your training goals and the features that matter most to you. A simple model is ideal for tracking everyday activity, while more advanced watches offer detailed insights to support regular exercise and improve performance. Browse Decathlon Australia's range of fitness watches to support your training and everyday activity.
Decide how wet it'll get. A 5 ATM rating like the ATW100 handles rain, sweat and surface swimming. Step up to 10 ATM, as on the W900, and you're covered for repeated pool sessions and rougher water use. If you only run on dry land, 5 ATM is plenty and saves you money. If your training regularly involves water, size up the rating from the start.
Build and durability
Match the build to how hard you'll use it. The ATW100's lighter case suits everyday runs and casual wear. The W900 uses a steel and ABS case with scratch-resistant mineral glass, built for knocks and years of use. If the watch lives on your wrist through gym, trail and travel, the tougher build earns its place. For gentler use, the lighter option is more comfortable.
Timing features
Work out what you actually time. A split-timer, on all three, covers laps and set distances. Interval mode, on the W500, lets you build structured work-and-rest sessions and repeat them. If your training is straight runs, split timing is enough. If you do intervals or fartlek, the interval features save you fiddling mid-session.
Strap and fit
Think about how often you'll swap the strap. The W900's tool-free SWIP system slides on and off in seconds, handy if you switch colours or replace a worn strap. A standard strap is fine if you'll leave it as-is. For a watch you'll wear for years, easy strap changes extend its life without a trip to a repairer.
People wanting simplicity. The basic fitness watch is a practical choice if you're looking for straightforward activity tracking. It records daily movement and key fitness data while remaining easy to use for everyday wear.
Regular active users. The mid-range fitness watch is designed for frequent wear and regular activity tracking. With durable materials and reliable sensors, it holds up to regular use while keeping you connected to your progress every day.
Active trainers and sports players. The advanced fitness watch is suited to people who train regularly and want more detailed fitness insights. Additional features and activity modes provide extra support across a wide range of workouts and sports.
Maintaining your fitness watch properly
After exercise, wipe your fitness watch with a soft, damp cloth to remove sweat and allow it to dry completely before storing it. Avoid prolonged exposure to direct sunlight, as this may affect the display and materials over time. For a more thorough clean, use mild soap and water where appropriate, then allow the watch to air dry completely. Store it in a cool, dry place when not in use. Your Decathlon fitness watch is backed by a 2-year warranty.
Fitness watches by type
Type
Best for
Entry-level and basic watches
Beginners building workout habits. Essential tracking for home fitness routines.
Regular users, all-round fitness tracking, daily and workout wear.
Mid-range feature watches
Intensive training, multiple sport modes, detailed metrics.
ATM is the water-resistance rating. A 5 ATM watch handles rain, sweat and surface swimming. A 10 ATM watch is built for repeated pool sessions and rougher water use. The higher the ATM, the more water the watch can take.
Which fitness watch is best for swimming?
For regular swimming, choose a watch with 10 ATM (100m) rating and buttons that work underwater. A 5 ATM rating is fine for occasional pool sessions and surface swimming. If you swim often, size up to the higher rating from the start.
Do these fitness watches have GPS?
What's the most durable fitness watch for daily wear?
Can I set up interval sessions on the watch?
No. Running watches time your sessions with split-timers and interval modes rather than tracking distance by satellite. If you want GPS distance and pace mapping, look at sports watches or GPS fitness trackers instead.
The W900 is the toughest of the three, with a steel and ABS case, scratch-resistant mineral glass and a tool-free strap you can swap in seconds. It's built to survive knocks and years of use. The ATW100 is lighter and more comfortable if your use is gentler.
Yes, on the W500. Its interval mode lets you build structured work-and-rest phases and repeat them, so you're not resetting the timer mid-session. The ATW100 and W900 handle simpler split timing for laps and set distances.
Take Your Training Further
Whether you're just getting started with training or you're chasing big goals, we've got a fitness watch for your level. Each one is built tough and tested by athletes like you. You'll know it'll hold up because we back every watch with a 2-year warranty.
All SportsMenWomenKidsAccessoriesEquipment and LeisureHealth & NutritionBest DealsNew ArrivalsMarketplace
Hiking & Trekking
Swimming
Cycling
Fitness (Yoga/Pilates)
Camping
Running
