A stretching app may show a hold, a repetition count or a whole-session timer. Those numbers answer different questions. Before changing a target, check whether you are staying in one position or moving through repetitions. This guide explains how to read the timing and make room for it in your day.
General information from the Unknot team, based on the linked public health guidance checked on 8 October 2026. This article has not been medically reviewed. Its scheduling examples are editorial examples, not a prescribed exercise programme.
1. Why do some routines say 15–20 seconds and others say 30?
The NHS specifies 15–20-second holds in its after-exercise sequence; Mayo Clinic suggests about 30 seconds generally. Keep each routine’s instructions and timing together rather than choosing one number for everything.
Sources: NHS: stretching after exercise · Mayo Clinic: stretching safely
2. Check what the timer is measuring
A hold timer measures time in a position. A repetition target counts complete movements. A session timer measures the whole practice, which can include setup, changing sides and rests. Write down which target you are following before you start. If a screen gives both a count and a duration, read the movement instructions to understand how they fit together.
3. Check comfort and suitability
Ease out of the position if stretching causes pain. Mayo Clinic advises feeling tension rather than pain and avoiding bouncing. An injury, medical condition or pregnancy may change which stretches are suitable. Ask a physiotherapist or healthcare professional about appropriate movements and timing.
Sources: Mayo Clinic: stretching safely · NHS: stretching after exercise
4. Warm up before a held stretch
Mayo Clinic recommends warming up with light activity for 5–10 minutes, or stretching after exercise. A longer hold cannot replace preparation. Allow room for the warmup when scheduling your routine.
Sources: Mayo Clinic: stretching safely
5. Allow for both sides and transitions
For planning only: four movements with a 30-second hold on each side would contain four minutes of holds. Setup, changing position and preparation add time. A five-minute calendar slot therefore does not necessarily fit that sequence. Count the complete routine before scheduling it, and check whether the instructions say to repeat on the other side.
6. Use the app to organise the practice
Unknot on iPhone lets you preview movements, adjust targets and pause a session. Its illustrated demonstrations and numbered instructions help you follow the selected movement. Read those instructions before starting the clock. Choose a routine that fits your available space, and use pause when you need time to change position. A countdown can organise practice; it cannot decide whether a movement suits you.
Sources: Unknot’s current iPhone listing
7. Record what you actually completed
If you end a hold early or leave a movement out, note that in your own practice record instead of treating the planned total as completed time. At the next session, check the same instructions again. Keeping the target and what you actually did separate makes your notes more useful than recording only that the timer reached zero.
Choose the instructions before the duration
Start with a suitable movement and its instructions, then plan the time and space to follow it. Use the timer as a practical aid. You do not need to turn each session into a test of how long you can stay in a position.
Questions before you start
Does the same hold time apply to every stretch?
Follow your routine’s movement-specific instructions. NHS and Mayo Clinic examples use different durations; one timing does not cover every exercise.
Sources: NHS: stretching after exercise · Mayo Clinic: stretching safely
Should I keep stretching until the timer finishes if it hurts?
Ease out if it hurts. Mayo Clinic advises avoiding pain and bouncing. A countdown should never make you ignore discomfort.
Sources: Mayo Clinic: stretching safely
Can I pause Unknot while I change position?
Yes. The current iPhone listing describes pausing whenever you need, previewing movements and adjusting targets. Preview your selected routine before starting so you know what the session asks you to do.
Sources: Unknot’s current iPhone listing
Discover your starting point. Build a stretching habit that helps you move more freely.
Unknot is available on the App Store for iPhone.
