Your friends invite you to go on vacation with them, but the vacation interferes with your daily exercise routine. what is the healthiest personal choose you can make regarding the two events?
politely decline the invitation and cite your reasons
go on the vacation, but raise the intensity of your exercises when you return
ask your friends if they could postpone the vacation until you achieve your fitness goal
set time aside to exercise while you vacation with your friends

Set time aside to exercise while you vacation with your friends

Explanation:

If you want to go on vacation with your friends, it will not be healthy for you to decline their invitation because of your exercise routine. If you refuse, your exercises will not be pleasurable because you will be sorry that you are not having fun.

For this reason, if you wish to go on vacation with your friends you must accept the invitation and adapt your exercise routine to your travel routine. That is, you can set aside time to work out while you vacation with your friends.