Stretching Duration Calculator

Work out stretching duration instantly with clear inputs, formula shown and shareable results.

About Stretching Duration Calculator

Flexibility gains follow total time under stretch, with about 60 seconds per muscle group per session being the evidence-supported target. Eight groups held 30 seconds twice each is 480 seconds of stretching, and allowing ten seconds to change position makes the session about 10.7 minutes. Three sessions a week is the usual minimum for lasting change.

Formulas

Time under stretch

total = muscle groups x hold time x repetitions

Session length

session = stretch time + transition time

Worked example

With the default values below, Stretching Duration Calculator returns Session Length of 10.7. Change any input above and every figure here is recalculated in your browser.

Inputs used

Muscle groups to stretchminimum 1: 8
Hold time per stretchminimum 1 s: 30 s
Repetitions per muscle groupminimum 1: 2

Results

Session Length: 10.7 min
Total Time Under Stretch: 480 s
Weekly Total At Three Sessions: 32.0 min
Hold Time Per Muscle Group: 60 s

Step by step

1Values used
2Time under stretch
3Session length
4Session Length= 10.7 min
5Total Time Under Stretch= 480 s
6Weekly Total At Three Sessions= 32.0 min
7Hold Time Per Muscle Group= 60 s

Assumptions and limits

The result is derived only from the 3 inputs listed above. Anything not among them is not part of the calculation.
In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
Figures are rounded for display to 1 decimal place, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
This is an estimate from population-average equations, not a medical or diagnostic assessment. Individual results vary with genetics, training history and technique. Seek advice from a qualified coach or clinician before making significant changes to training.
This is an estimate for general information and not professional medical advice. See the full disclaimer for the limits that apply to this kind of calculator.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

This is an estimate from population-average equations, not a medical or diagnostic assessment. Individual results vary with genetics, training history and technique. Seek advice from a qualified coach or clinician before making significant changes to training.

Frequently Asked Questions

How long should each stretch be held?

Around 30 seconds per repetition, aiming for at least 60 seconds total per muscle group. Longer single holds add little.

Should I stretch before or after training?

Static stretching before power or strength work briefly reduces output, so save it for afterwards or separate sessions. Use dynamic mobility beforehand.