Why daily strain should count all-day heart rate, not just workouts

Picture two days. On the first, you do a 30-minute workout and spend the rest of the day at a desk. On the second, you do no workout at all, but you walk to the market, carry shopping up three floors, chase a toddler around the park and spend the evening on your feet cooking for guests.

A strain score built only from workouts says the first day was harder. Your legs, and your heart rate, may say otherwise.

This article explains why Velqiri's daily strain counts heart rate from the whole day, how it avoids turning quiet time into fake effort, and why the number is a guide rather than a target.

What "strain" is trying to capture

Strain is a way of summarising how much cardiovascular load your day contained. Heart rate is a practical signal for that: when you move more, climb, carry or work hard, your heart beats faster to deliver more oxygen. Time spent at a raised heart rate adds up to load.

Most people already understand heart-rate zones from workouts: an easy zone for conversation pace, harder zones for efforts you can only hold for a while. Zones are usually set as a share of your maximum heart rate, so the same heart rate can be easy for one person and hard for another.

Load from those zones is not only created in workouts. The body does not know whether you were "exercising" or "carrying a gas cylinder up the stairs". It only knows it had to work.

Why workouts alone miss part of the day

Counting only recorded workouts has three blind spots:

Active days without a workout look like rest. A day of walking and chores can come out at nearly zero, which does not match how the day felt.
Forgotten recordings disappear. If you forget to start a workout on the Watch, a workout-only score acts as if it never happened.
The rest of the day gets ignored. Even on training days, the hours around the session add to the total. A hard session after a long day on your feet is a different day from the same session after a lazy one.

When strain feeds into advice about tomorrow, these gaps matter. Telling someone they had an easy day, and can push harder, after a day that was actually demanding is the wrong way round.

Counting all day without counting noise

The risk with all-day heart rate is the opposite mistake: turning ordinary life into imaginary exercise. Heart rate rises a little when you stand up, talk, eat or feel stressed. If every reading counted, a quiet day at a desk could still look busy.

Velqiri handles this in a few deliberate ways:

Only readings above a low threshold count. Heart rate outside a workout adds load only when it is in zone 1 or above, meaning at least half of your maximum heart rate. Sitting still adds nothing, so a genuinely quiet day stays close to zero.
Each reading covers a short, capped stretch of time. The Watch samples heart rate every so often rather than continuously. Each reading outside a workout stands for the time until the next one, up to five minutes, so a brief spike between two sparse readings cannot be stretched into an hour.
Workouts and all-day readings are not double counted. Heart rate inside a counted session belongs to the session. If the same run is imported by two apps, it counts once.
No data is not a zero. If there is no heart rate and no session for a day, strain is shown as unavailable, not as zero effort.

Workouts still count in full. When a workout has enough heart-rate readings, its load comes from time in each zone. When it does not, Velqiri falls back to the workout's average heart rate, or to your own effort rating or Apple's effort score. The Strain screen says which method was used and how many minutes the all-day heart rate added, so you can see where the number came from.

A suggested range, not a quota

A strain number on its own does not tell you whether a day was right. The same load can be a sensible training day when you are well rested and too much when you slept badly or feel run down.

That is why Velqiri shows a suggested range for the day, based on your recovery. When recovery is higher, the range sits a little higher. When it is lower, the range comes down. If a check-in says your energy is very low or you are quite sore, the range is capped lower. If you report being unwell, the range is removed entirely, because the only sensible suggestion is rest.

Being below the range is not a failure. Rest days and easy days count. A higher strain number is never a better one, and the range is a suggestion you can ignore when you know better.

What strain cannot tell you

Strain is an estimate of cardiovascular load on the app's own 0 to 21 scale. It is not a medical measure, it is not a fitness test, and it cannot compare you with other people. Heart-rate readings from a wrist device can be off during some activities, such as weightlifting or activities with lots of wrist movement. And it says nothing about how your muscles, joints or mind feel, which is why a check-in about energy and soreness matters too.

If you have chest pain, feel faint or unusually breathless during activity, stop and seek medical help. No score is worth pushing through those signs.

In Velqiri

The Strain screen shows your day's strain on a 0 to 21 scale with today's suggested range, heart-rate zone time, workouts, exercise minutes, active energy and stand hours against your usual. Workouts also show heart rate recovery and Apple's effort score, along with the Watch model that recorded them.

The coach opens the screen with a short read of your day and one next step. Say "gym this evening" and your plan moves with you. Strain works together with recovery, so it helps to understand what HRV is and why it moves as well. The Support page explains why Velqiri's numbers can differ from other apps: strain counts the whole day, and recovery compares with your own usual range.

Velqiri is a wellness app, available on the App Store for iPhone and Apple Watch. Its scores are wellness estimates that show their inputs, not clinical interpretation.

The short version

Your body experiences load from the whole day, not only from recorded workouts.
Velqiri adds all-day heart rate at zone 1 or above, with each reading covering at most five minutes, so sitting adds nothing.
Missing data shows as missing, never as zero effort.
The suggested range follows your recovery, and rest days count.
Strain is a wellness estimate, not a medical measure.

Velqiri is a wellness app, not a medical device. This article is general information, not medical advice. Talk to a qualified professional before starting a new exercise programme, especially if you have a medical condition, take medication or have symptoms.