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How Temperature and Training Affect Your Pace

BY Hal Higdon

The weather and your training load can affect your pace. Rather than stress about your times it's best to stay focused on your goal.

Have a question about running? You’re in the right place. Every Tuesday, world-renowned coach, author and athlete Hal Higdon posts and answers athlete questions here. You can submit your question by joining the discussions on Hal Higdon’s Virtual Training Bulletin Boards.


Just wondering if you might have known of somebody who is having the same problem that I am, and if so, what did they do? I’m on the eighth week of training for my first half marathon. My 3 mile time is almost a full two minutes slower than what it was four weeks ago: 29:49 vs. 27:59. I know both times are slow but I figure I should be improving.


You need to relax and let the program carry you along. We’re at the end of the usual Very-Hot-Summer, when times often are slower, often much slower. I ran a couple of 5-K races recently about a month apart. My time in the second race was several minutes slower than my earlier time despite the second having an easier course. The reason was weather. Heat drains us, not merely in races, but in the workouts leading up to races.

Another factor involves the structure of most training programs, including almost all of mine. As week piles onto week, they get tougher. My Novice 2 Half Marathon program begins in Week 1 with a 4-mile long run and peaks one week before the race in Week 11 with a 12-mile run. The mid-week runs on Wednesdays, go from 3 to 5 miles, a subtle change, but one moving relentlessly upward. As we run more miles, yes, our fitness improves, but we also need to slow. Nobody can run a mile at the same pace as they can run a marathon.

Maybe you need to leave your watch at home when you run. Don’t worry about time or “improving.” Worry about finishing the program while looking forward to your half marathon race.

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About Hal Higdon

Hal Higdon is a Contributing Editor for ‘Runner’s World‘ and author of 34 books, including the best-selling ‘Marathon: The Ultimate Training Guide’. He ran eight times in the Olympic Trials and won four world masters championships. Higdon estimates that over a quarter of a million runners have finished marathons using his training programs, and he also offers additional interactive programs at all distances through TrainingPeaks. Hal uses TrainingPeaks to power his interactive marathon and half marathon training plans — check out more of Hal Higdon’s training plans on his website.