Apple Watch for fitness

8 min read

The Apple Watch is the most popular smartwatch in the world and one of the best-selling fitness gadgets ever. But is it a serious fitness tool or an expensive step counter on your wrist? The honest answer: it depends on how you use it.

What the Apple Watch does well

Let's start with where the Apple Watch really excels:

Heart rate monitoring. The optical heart rate sensor is surprisingly accurate for a wrist-worn device - on average 95-97 percent accurate compared to a chest strap during steady-state cardio. For heart rate zones during running or cycling, that's more than good enough. For strength training it's less reliable due to wrist movements, but for a general overview it suffices.

Activity rings. This is psychologically cleverly designed. Three rings - move, exercise, and stand - that you try to close daily. It works through the principle of "loss aversion": not wanting to break a streak is a stronger motivator than pursuing a reward. Many users cite this as the only reason they keep wearing the Watch.

Workout tracking. The Apple Watch automatically recognizes many activities and logs duration, heart rate, and estimated calories. For cardio activities (running, cycling, swimming) the tracking is decent. For strength training it's more basic - it measures duration and heart rate but cannot distinguish specific exercises without manual input.

Long-term health data. The real value lies in trends over months and years. Seeing your resting heart rate drop over six months of training. Seeing your VO2max estimate go up. That long-term data tells you more than a single measurement ever can.

Where the Apple Watch falls short

Now for the honest part:

Calories are unreliable. The "active calories" that the Watch estimates can deviate 20-30 percent from reality. Sometimes more. Don't base your nutrition on this. If the Watch says you burned 500 kcal during a workout, in reality that could be 350 or 650. Use it as an indication, not as fact.

Sleep tracking is basic. Compared to dedicated sleep trackers, the Apple Watch lacks depth. It measures sleep time and rest moments, but the analysis of sleep stages (deep, light, REM) is less accurate than specialized devices. Moreover: you have to wear the Watch at night, which means you have to charge it during the day.

No real strength training features. The Watch doesn't count repetitions reliably. It cannot measure how much weight you lift. It gives no feedback on your technique. For strength training, a simple notebook or a tracking app on your phone is more effective.

Information overload. Some users become obsessed with their data. Every heart rate fluctuation, every calorie calculation, every step. That can backfire if it changes your relationship with movement from "I move because it feels good" to "I move to hit a number."

How to optimally use the Watch for fitness

The best way to use the Apple Watch:

• Focus on trends, not daily figures. One day with 3,000 steps instead of 10,000 is not a problem. But if your average over a month drops from 8,000 to 5,000, that's a signal
• Use the activity rings as a habit tool. Not as a performance measurement. The goal is to close the rings, not to get the perfect score
• Ignore the calorie estimate for nutrition decisions. Eat based on your plan, not based on what the Watch says you burned
• Use heart rate zones for cardio. Zone 2 training (low intensity, long volume) is one of the most effective forms of cardio. The Watch is good enough to keep you in the right zone
• Set realistic goals. Apple suggests a default move goal based on your activity. If that's 600 kcal and you never reach it, lower it to 400. Better to reach your goal every day than never

Is the Apple Watch worth it?

That depends on where you stand. If you already train consistently and follow a good program, the Watch adds little to your results. It's a nice extra, not a necessity.

If you struggle with consistency and your motivation is low, the activity rings can be exactly the nudge you need. The Watch is then not a fitness tool but a behavior tool - and it's good at that.

If you already have it: use the data wisely and don't let yourself be led by every number. If you're considering one: know that you can get perfectly fit without it too. The best fitness tracker is the training you actually do.

Alternatives to consider

The Apple Watch is not the only option. Depending on your priorities, there are alternatives that perform better in specific areas:

• Garmin (Forerunner, Venu): Better GPS tracking, longer battery life, more detailed training analysis. The best choice for runners and cyclists. Less beautiful as a smartwatch, much better as a sports watch
• Whoop: No screen, purely focused on recovery and sleep. Measures strain, recovery and sleep more accurately than the Apple Watch. Subscription model (30 euros per month). For serious athletes who train data-driven
• Oura Ring: Sleep tracking that far exceeds the Apple Watch. Wears as a ring, not as a watch. Less suitable for active training, excellent for recovery monitoring
• Chest strap (Polar H10): The gold standard for heart rate measurement. 99+ percent accurate. Use it during training and send the data to your phone. Cost: 60-80 euros, no subscription

For most people who already have an Apple Watch: just use it. You don't need to upgrade to a specialized device unless you need very specific data. The Watch does 80 percent of what the more expensive alternatives do, and it's a device you already wear anyway.

An Apple Watch doesn't make you fitter. Consistent training and good eating makes you fitter. The Watch can help you maintain that - but only if you use the data as a compass, not as a boss.