Bachten de Kupe
So I read this as:
Current Health: 1
Events Spent: 3
New Health: Current Health + Resting Result: 1+9=10 However Max=9
This is the correct interpretation: in this particular case you'll end up with 9 health.
The explanation of the rule is: each time you choose to spend one event, you gain 3 health, up to your maximum, which is 9 in the basic game and almost all scenarios.