Running Taper: How Long to Taper and How to Warm Up on Race Day
By Dr. Rachelle Barrett, DPT , Performance Physical Therapist, Rehab 2 Perform Gambrills | October 2026
I remember my first half marathon. We were bused to the start, and by the time we got there, there wasn’t much time to do anything before getting into the corral. I went from sitting on a bus to standing around with cold legs, trying to squeeze in whatever warm-up I could before the race started. I had put the work in during training, but those first few miles felt like my warm-up.
Almost every runner has a version of that morning. The months of training get planned down to the workout, and the last two weeks and the last twenty minutes get left to chance.
If you’re lining up at the Baltimore Running Festival this weekend, your running taper is already in the books. Those last twenty minutes are still up for grabs, and the race morning warm-up below has you covered.
For everyone with a goal race still on the calendar, start here. By the time you’re two weeks out, the hard part is behind you. A running taper won’t build new fitness. It decides how much of the fitness you already have makes it to the start line with you.
What a Running Taper Actually Does
Months of training leave you fitter and more tired at the same time, and the fatigue hides the fitness.
A running taper pulls back on volume so the fatigue can clear while the fitness stays put. Nothing you do in these final days will build meaningful new fitness. The job shifts from building to protecting what you’ve built.
The runners who get it right keep their intensity. They run shorter versions of similar workouts at the same paces, with less total running around them.
How long the taper lasts depends on your race distance and your training:
- 5K or 10K: A few days of lighter running
- Half Marathon: 1 to 2 weeks
- Full Marathon: 2 to 3 weeks
What a Running Taper Actually Does
Months of training leave you fitter and more tired at the same time, and the fatigue hides the fitness.
A running taper pulls back on volume so the fatigue can clear while the fitness stays put. Nothing you do in these final days will build meaningful new fitness. The job shifts from building to protecting what you’ve built.
The runners who get it right keep their intensity. They run shorter versions of similar workouts at the same paces, with less total running around them.
How long the taper lasts depends on your race distance and your training:
The Taper Mistake We See Most
About halfway through the taper, a lot of runners start to feel flat. Legs feel heavy, easy runs feel harder than expected, and suddenly there’s an urge to add miles or squeeze in one more hard session to prove you’re ready.
Don’t chase fitness during the taper. Feeling sluggish can be completely normal as your body repairs and recharges. Some runners feel tired, others feel full of energy, and it can change day to day.
That extra workout won’t add meaningful fitness before race day. It may just bring back the fatigue you’ve been working to clear. Trust the work you’ve already done.
How to Warm Up on Race Morning
Back to those twenty minutes before the gun. Whether you’re stuck in a shuttle line or standing in a corral with cold legs, a plan beats a scramble.
Every runner’s warm-up can look different and should be individualized based on their specific needs, training goals, and history of previous injuries. A good race day warm-up increases blood flow and tissue temperature, and it uses movements and drills that mimic the demands of running.
Here’s a simple starting point:
- 5 to 10 minutes of easy jogging
- A few dynamic drills: hamstring sweeps, quad pulls, knee hugs, A-skips, or any drill you already use in training. Watch this simple routine HERE
- 3 to 4 short strides: gradually build toward race pace, then give yourself plenty of recovery before the next one
For a 5K or 10K, you’ll generally want a more complete warm-up because you need to be ready to run faster from the start.
For a half marathon or marathon, keep it lighter and save that energy for the miles ahead.
Don’t introduce a brand-new routine on race morning. Run through your warm-up before a workout this week so you know what feels good and race morning feels familiar.
Pro tip: the porta-potty line can be prime warm-up real estate. Leg swings, ankle circles, even a few dynamic movements if space allows.
Trust the Work You’ve Already Done
You’ve trusted your training plan for months, through early alarms and long runs you didn’t feel like doing. What would it look like to trust it for two more weeks?
Cut the volume. Keep the intensity. Rehearse the warm-up. You put months into training. Don’t make mile one your warm-up.
See What Race Day Revealed
Race day will tell you a lot: where you faded, where you felt strong, and what you’d do differently next time.
Once you’re fully recovered, a Running Analysis takes a deeper look at your running mechanics, strength, and capacity, then uses those findings to shape your next training block.
Dr. Rachelle Barrett, DPT is a Performance Physical Therapist and Running Specialist at Rehab 2 Perform in Gambrills, MD. She works with runners of all levels, from first-timers to triathletes, helping them identify the mechanics and strength gaps that limit performance and cause injury. Rachelle leads the Run R2P community at Gambrills and conducts running analyses for athletes across Maryland and Virginia.
Frequently Asked Questions About Foot Striking
A running taper is the planned reduction in training volume before a goal race. Intensity stays, total running drops, so the fatigue from months of training clears while your fitness stays put.
A half marathon typically benefits from 1 to 2 weeks. A marathon usually needs 2 to 3 weeks, and a 5K or 10K may only need a few days of lighter running. Your training matters too, not just the distance.
Yes, in smaller doses. Run shorter versions of similar workouts at the same paces, with less total running around them. What you drop is volume, not intensity.
Yes. Many runners feel flat or heavy-legged partway through as the body repairs and recharges. Others feel full of energy, and it can change day to day. Resist adding miles or an extra hard session to prove you’re ready.
Yes, but keep it lighter than you would for a 5K or 10K. Shorter races ask you to run fast from the start, so they need a more complete warm-up. Longer races reward saving that energy for the miles ahead.
Once you’re fully recovered, a Running Analysis puts your mechanics, strength, and capacity on film and on paper. A performance physical therapist connects what showed up on race day to what’s driving it, so your next training block starts with a plan instead of a guess.
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