I came across an important article on RunningTimes.com titled, When a Workout is Going Badly – Should you cut it short or gut it out?
It’s an important article because every runner has encountered this problem when training towards a specific goal. If a key workout isn’t going as planned because you’re sluggish or not in it mentally, make a quick adjustment by cutting it short and taking another day or two until you’re ready to run it effectively. On days when you’re struggling to hit your workout splits, maybe due to poor weather conditions, focus more on the effort and less on how fast you’re actually running.