Réponse :

ex 1

1) 15bat/15s = 15x4bat/15x4s = 60bat/60s = 60bat/min

4mvt/30s = 4x2mvt/30x2s = 8mvt/60s = 8mvt/min

60bat/30s = 60x2bat/30x2s = 120bat/60s = 120bat/min

5mvt/15s = 5x4mvt/15x4s = 20mvt/60s = 20mvt/min

33bat/10s = 33x6bat/10x6s = 198bat/60s = 198bat/min

7mvt/10s = 7x6mvt/10x6s = 42mvt/60s = 42mvt/min

2) Après un effort, la fréquence cardiaque et respiratoire augmentent, on respire de plus en plus vite et notre cœur bat de plus en plus vite.