Breath and Reach Stretch Experiment

In pairs, students measure fingertip-to-floor distance in a standing forward fold under two conditions: holding their breath and breathing out slowly for 30 seconds. Class results are compared to see how relaxation affects flexibility.

How to play

1. The teacher poses the question: do we reach farther holding our breath or breathing slowly? Each student writes a prediction on the form (1 min).
2. Students pair up with a measuring tape and a form; A stands with feet together and knees straight but not locked (0.5 min).
3. Condition 1: A takes a breath, holds it, and folds forward with arms hanging for 5 seconds; B measures from the tip of the middle finger to the floor and records it (1 min).
4. A rolls up slowly, marches in place for one minute, then does condition 2: folds the same way but breathes out slowly for 30 seconds, letting head and arms hang; B measures at the end (1.5 min).
5. Partners switch roles and repeat both conditions (2.5 min).
6. The teacher tallies on the whiteboard how many students improved with slow breathing, stayed the same, or got worse, and the class discusses the result (2.5 min).

Rules

• Both conditions use the same foot and knee position.
• Always roll up slowly, one vertebra at a time, to avoid dizziness.
• Safety: anyone with lower-back discomfort does the test seated with legs straight.

Variations

Adaptations

• Limited mobility: do the test seated on a chair, reaching toward the feet while the partner measures to the floor.
• Hearing impairment: the question and the conditions are written on the form and the whiteboard.
• Fitness level: students who reach the floor record how many fingers or whether the palm touches instead of distance.

Learning goals

• Test the effect of breathing on stretching through an experiment.
• Record and interpret personal and group data.
• Use slow breathing as a tool to stretch better.

Equipment for a class of 25

• measuring tapes: 13
• self-assessment forms: 25
• whiteboard: 1

Teacher tip

Some students will improve little or not at all: explain that the group result matters more than any one score.

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