The popular Xiaomi Mi Band 4 activity tracker requires a proper wrist fit to ensure measurement accuracy. Many users underestimate the importance of the tracker's tightness to the skin, leading to incorrect pulse data and missing notifications.
In this guide, we will take a closer look at the anatomical features of wearing the device, where the sensor should be located, how to choose the optimal tension of the strap, and why this affects the battery’s autonomy.
Misuse can lead to false positives or, conversely, to complete disregard of physical activity. Let's look at the technical nuances that will help you get the most out of your gadget.
Choosing the Right Position on the Wrist
The optimal location for the tracker is a bone area located 1-2 centimeters above the wrist bone, which is where the skin is thinner and blood vessels come closer to the surface, which provides the optical sensor with better access to read the signal.
If you place the bracelet too low, closer to the palm of your hand, it will interfere with the flexion of your hand while walking or running, and in this place, the muscles and tendons create uneven relief, which can cause the sensor to lose contact with the skin when active movements.
Too high, closer to the elbow, is also undesirable. At this part of the hand, the pulse wave may be less pronounced, and friction against clothing when wearing a long sleeve will lead to permanent displacement of the gadget.
⚠️ Warning: Do not wear the tracker directly on the joint bone. Constant friction and pressure in this place can irritate the skin and reduce the accuracy of heart rate measurements.
For maximum accuracy during training, it is recommended to slightly shift the device upwards along the forearm, which is especially true for sports where the hands are actively working, such as running or cross-Fit.
Setting the strap tension
The right tension is the balance between comfort and reliability of the fixation. The strap should fit tightly, but not stretch the arm. The test is to check whether the fit is correct by a simple test: the tracker should not rotate freely around the wrist, but it should have a hard time passing the finger under it.
Excessive tightening of the strap disrupts blood circulation, paradoxically impairing the pulsemeter readings, blood simply does not reach the skin surface in the right amount, and the reading algorithms fail.
On the other hand, too loose landing allows air to enter between the sensor and the skin. The Mi Band 4 optical sensor works on the principle of reflecting light, and the air layer scatters the beams, making measurements impossible.
In hot weather or during intense exertion, when the arm swells, it is recommended to loosen the clasp by one division, this will prevent discomfort and soft tissue transfer.
Features of wearing during training
When you're playing sports, the demands on the fitness bracelet are increased, and sweating creates a slippery film on the skin, which can cause the device to slide down to the hand, at which point the sensor loses contact, and the training statistics are interrupted.
For strength training, such as dumbbells or barbells, a tight strap can interfere with normal wrist flexion, and in such cases, experienced athletes recommend wearing a tracker higher on the muscle part of the forearm, where there are no bony protrusions.
When swimming or exercising in water, you need to fasten the strap as tightly as possible. Water that falls under the sensor completely blocks the operation of the optical sensor, and the pulse ceases to be tracked until the moisture is removed.
- 🏃♂️ To run, tighten the strap a little tighter than usual so that the gadget does not "jump" on the hand.
- 🏋️♀️ When working with scales, shift the tracker higher so that it does not interfere with the grip and does not scratch on the projectiles.
- 🏊♂️ Before swimming, make sure the sensor area is dry and tightly pressed against the skin.
⚠️ Attention: After each sweating session, be sure to wipe the inner surface of the strap and sensor with dry cloth.
☑️ Checking before training
Effects of Tattooing and Hair on the Hand
The presence of tattoos at the sensor's adjoining location is one of the main factors that distort readings. Ink, especially dark colors, absorbs the light signal that the green LED of the pulsemeter emits.
The hair on the arm can also interfere, and the thick hair can prevent the tracker's plastic capsule from snugly fitting to the skin, creating microgaps, which can result in the device showing a resting pulse of 120-140 beats per minute or not seeing the hand at all.
If you have a tattoo on your wrist, the only solution is to move the wristband higher or lower, to a clean skin area, sometimes wearing the device on the inside of your wrist, although it's less convenient to view notifications.
Why can't the sensor see the tattoo?
For owners of thick vegetation on the hands, it is recommended to shave a small area of skin under the sensor or put up with periodic measurement errors.
Comparison of Wearing Options
The choice of side and orientation of the screen depends on personal preference and the dominant hand, but there are objective differences in convenience and functionality for the left and right options.
| Parameter | Left hand. | Right hand. |
|---|---|---|
| Right-handed convenience | High (does not interfere with writing) | Low (brush intrusions) |
| Screen access | Right hand (quickly) | Left hand (slower) |
| Risk of damage | Medium (about door jambs) | High (when working with a mouse) |
| Pedometer accuracy | Standard. | Standard. |
In the Mi Fit (or Zepp Life) settings, you can change the orientation of your wrist lift, which is critical if you wear the wristband on your right hand, otherwise the screen will light up when you lower your hand.
Also, it's worth considering that most people are right-handed. Wearing a gadget on an active hand increases the number of accidental taps and the risk of mechanical damage to a table or keyboard.
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The orientation of the wrist in the app must strictly match the hand you are wearing the device on, otherwise the Wrist Raising feature will not work correctly.
Device care and hygiene
Regular cleaning of Xiaomi Mi Band 4 is necessary not only for aesthetics, but also for skin health, under the strap creates the ideal environment for the reproduction of bacteria: heat, moisture and lack of air access.
The tracker itself can be washed under a stream of water, as it has IP68 protection, but the strap, especially if it is textile or silicone with relief, requires more thorough cleaning using soft soap.
If you notice redness or itching under the bracelet, remove it immediately. Let the skin "breathe" for a few hours. Continued wearing can lead to contact dermatitis.
- 💧 Wash the sensor with an alcohol wipe once a week for degreasing.
- 🧼 Wash your silicone strap with warm water and soap after each workout.
- 🌬️ Let the skin rest from wearing a gadget at least 1-2 hours a day, such as during sleep or shower.
Do not use aggressive chemistry or abrasive materials to clean the screen, as this can damage the oleophobic coating and impair the readability of the display in bright sun.