You should strive and do the best you can and not reset your goal. I say this because there will ALWAYS be some type of distraction or event, some excuse for why resetting and making an easier goal is better. So you can choose to either keep letting this cycle happen, or to not fall for it this time and keep your eye on the original prize. Yes, don’t hurt yourself, there’s no benefit in that. But your elevated goal may motivate you to get some mileage in over the weekends when you would have otherwise been OK with not doing activity had you reset your goal. And a thought about “the year” in general – who cares! Why would it matter if you can’t finish your goal in the remaining time this year? It’s a fitness and health goal, these take more time and dedication. For that reason alone, I cannot support the thought of making your goal easier simply cause life gets in the way. Life has a habit of doing this, so I figure it’s better to use this time to gain the experience of not changing your goals when life comes a-knockin’.