Key takeaways
- A taper is the planned reduction in training volume before a race.
- It lets the body recover, repair, and replenish energy stores after hard training.
- Intensity is usually maintained while volume drops, so fitness is kept but freshness gained.
- Done well it boosts performance; too much or too little leaves you flat or fatigued.
What a taper is
A taper is the planned reduction in training volume in the days or weeks before a race, designed to let the body recover from accumulated training fatigue, repair, and replenish energy stores — so the runner arrives at the start line rested and ready to perform.
How it works
You reduce volume (total mileage/time) while typically maintaining some intensity (a few shorter, faster efforts) so you stay sharp without digging into fatigue. The reduced load lets fatigue dissipate, tissues repair, and glycogen stores top up — preserving your fitness while raising freshness so you can express it on race day.
Three weeks out from a 100-miler, a runner begins their taper — cutting weekly volume step by step while keeping a couple of short, sharp efforts — so that by race morning the deep fatigue of months of long runs has lifted and their legs feel fresh and springy.
How long it should be
It depends on distance and the runner — shorter races may need only days to a week, while marathons and ultras often use one to three weeks. The key is balance: too much taper leaves you flat, too little leaves residual fatigue. Most plans cut volume progressively while keeping a touch of intensity (from intervals), often paired with carb-loading near race day.
The bottom line
A taper is the planned drop in training volume before a race, letting your body shed fatigue, repair, and refuel so you arrive rested. Intensity is usually kept while volume falls, preserving fitness while building freshness. Done well it delivers real performance gains; overdo it and you feel flat, underdo it and you're tired — so balance the length to your distance and learn what works for you.
Frequently asked questions
What is a taper in running?
A taper is the planned reduction in your training volume in the days or weeks leading up to a race. After a training block that has built fitness but also accumulated fatigue, the taper backs off the workload so your body can recover, repair, and refuel — arriving at the start line fresh and ready to perform at its best.
How does tapering work?
You reduce training volume (total mileage/time) while typically maintaining some intensity (keeping a few faster, shorter efforts) so you stay sharp without digging into fatigue. The reduced load allows accumulated fatigue to dissipate, muscles and connective tissue to repair, and glycogen (energy) stores to top up. The result is that your underlying fitness is preserved while your freshness rises, so you can express that fitness on race day.
How long should a taper be?
It depends on the race distance and the runner — shorter races may need only a few days to a week, while marathons and ultras often use one to three weeks. The key is balance: too much taper (cutting too much for too long) can leave you feeling flat and sluggish, while too little leaves residual fatigue that blunts performance. Most plans reduce volume progressively while keeping a touch of intensity, and runners learn over time what taper length and feel works best for them.
Sources
- Training & recovery — American Council on Exercise
- Endurance training — Road Runners Club of America