Five Reasons Fitness Trackers Can Be Harmful and How to Design Safer Wearables

Original publisher: The Conversation

The Conversation analyzes how fitness trackers, wearables and self-tracking apps in the UK influence our activity patterns, offering both potential benefits and growing concerns. While trackers can nudge people to move more and reveal useful patterns, they can also promote anxiety, shame and disordered eating when targets and feedback are misused. The article outlines five key risks and suggests design and policy changes to reduce harm while preserving usefulness.

• The fixation on steps can distort what counts as worthwhile movement, privileging easily measured activity over strength, mobility or recovery.
• Chasing targets may erode enjoyment, turning movement into a chore and weakening intrinsic motivation.
• An always-on more-is-more approach can overlook individual context, health history and recovery needs.
• Defaults assume an average consumer who may not exist, risking unhealthy nudges around weight loss and body image.

Overview

The article discusses how fitness trackers have become ubiquitous in the UK and how their prompts, defaults and feedback can shape behavior beyond simply recording activity. While there is evidence that tracking helps some people stay active, there are rising reports of anxiety, shame and disordered eating linked to close engagement with self-tracking devices. The piece presents five reasons tracking can become harmful and offers guidance for safer design and personalization.

1. The fixation on steps

The 10,000-step target originated as a marketing slogan and lacks a universal scientific basis. Researchers suggest around 7,000 steps may be more realistic and beneficial for many adults, yet the badge of 10,000 steps persists. Trackers tend to privilege what they can easily count, often wrist-based steps, and may misread movement, missing cycling, swimming or strength training. This can skew users’ sense of movement and undervalue other worthwhile activities.

2. Movement loses its joy

Turning movement into a goal when building a habit can make activity feel like a chore. Repeated failure to meet targets may lead people to abandon both the device and the healthier routines it was meant to foster. The article argues that enjoyment supports lasting habits, whereas external metrics can erode intrinsic motivation.

3. The more-is-more approach

Many devices treat greater activity as the default success metric, delivering persistent prompts and feedback that may reinforce targets without considering individual context. People recovering from illness, sleep deprivation, injuries or pregnancy may require different guidance, which is often not built into the device’s assumptions.

4. The default user does not exist

Design and marketing often target an idealized average consumer, but real populations vary in body type, health history, goals and circumstances. Defaults may reflect narrow norms, including male-centric body ideals, and can push for weight loss or excessive exercise in some groups, with potential physical and psychological harm.

5. It blames you when things go wrong

Sedentary behavior is a societal issue, yet trackers frequently frame inactivity as a matter of individual willpower. That framing can induce pressure, shame and discouragement when daily life intrudes on targets. The article emphasizes the need for safer, more personalized support that accounts for individual goals, experience and context, rather than placing all responsibility on users.

What to do next

The piece concludes that tracking should be viewed as information rather than instruction. Devices can disclose measurements but cannot determine today’s needs. Designers bear responsibility for reducing fixed targets, making non-step activities more visible, incorporating rest without guilt, and offering safer defaults for diverse bodies and health histories. The overarching message is to avoid letting a numeric target dictate the value of movement.

Implications for policymakers and developers

To make tracking safer, developers should emphasize rest and recovery, broaden the scope beyond steps, and personalize defaults. Policymakers and health providers can support safer use by endorsing flexible guidelines and ensuring accessibility to non-judgmental, individualized guidance rather than individualizing all responsibility onto users. The article argues for a shift from numbers to context, with technology aiding informed decisions rather than enforcing a one-size-fits-all standard.