Everyone loses momentum. The person who appears most consistent, most disciplined, most reliably on track — they have also had weeks where it fell apart. Where the routine broke, the motivation disappeared, the progress stalled.
The difference between the people who eventually get where they're going and the ones who don't is not that the first group never loses momentum. It's that they get better at starting again.
Starting again is a specific skill and it can be practised. Like any skill, it gets easier with repetition. The first time you have to restart after a long pause, it feels enormous — almost as hard as starting in the first place. The tenth time, you know what to do. You know the first day back is always uncomfortable. You know the second day is slightly less so. You know that by the end of the first week you'll have rebuilt enough momentum that stopping again would feel like a loss.
The key insight about starting again is this: you don't have to get back to where you were before you can move forward. You just have to start from where you are. This week, this day, this moment. Whatever progress was lost — it was not entirely lost. Some of it is still there, in your body, in your habits, in your knowledge. And the rest can be rebuilt faster than it was built the first time.
Begin again. Just begin.