Pulse Detectives: 10, 15 or 30 Seconds?

A warm-up where students take their pulse counting for 10, 15 and 30 seconds and check which method is the most reliable. It builds an accurate pulse check before using it in the lesson.

How to play

1. Review where to take a pulse: the wrist (radial) or the neck pressing lightly (carotid), with two fingers, never the thumb (2 min).
2. Easy two-minute jog, then stop: the teacher times 10 seconds; count and multiply by 6 (3 min).
3. Same jog and stop: now count for 15 seconds and multiply by 4 (3 min).
4. Third jog and stop: count for 30 seconds and multiply by 2. Each student compares their three numbers on the sheet (3 min).
5. Quick share-out: which method gives steadier numbers? Why does the pulse drop if we count for a long time? (1 min).

Rules

• Count silently using your fingers, never your thumb.
• On the neck, press gently and only on one side.
• Numbers are personal: don't say them out loud.
• Jog easy: the point is measuring well, not running hard.

Variations

Adaptations

• Deaf or hard of hearing: start and stop of the count are shown by raising and lowering a sign.
• Students who can't find their pulse: place a hand on the chest or use a class heart rate monitor if available.
• Limited mobility: does the bouts in a wheelchair or as a brisk walk; counting is the same.

Learning goals

• Take a pulse with correct technique.
• Compare counting methods and pick the most reliable.
• Warm up gradually.

Equipment for a class of 25

• stopwatches: 2
• recording sheets: 30
• pencils: 30

Teacher tip

Ten-second counts usually jump around more, and 30-second counts come out a little lower because heart rate drops while you count. Fifteen seconds is usually enough in class.

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