Taper

Taper

By Dr. Sean Radford 25th February 2022 (Updated 22nd May 2026)

Taper refers to the period of reduced training volume and intensity that occurs before a key race or event. It is a strategic approach to allow the body to recover, repair, and reach peak performance levels for the race.

During a taper, runners gradually decrease their mileage, intensity, and the frequency of their workouts in the weeks leading up to the race. The taper period typically lasts around one to three weeks, depending on the individual, the race distance, and its importance.

The main goals of tapering can be seen as:

  • Recovery: Tapering allows the body to recover from the accumulated fatigue and minor injuries that may have occurred during the training phase. It gives muscles, tendons, and ligaments time to repair and rebuild, reducing the risk of overuse injuries.
  • Adaptation: Tapering allows the body to adapt to the training stimulus it has received during the previous weeks or months. It helps optimise energy stores, enhance muscular strength and coordination, and improve neuromuscular efficiency, all of which contribute to improved race performance.
  • Restoration: Tapering improves glycogen stores in the muscles and liver, leading to better fuel utilisation during the race. It also replenishes any depleted nutrients and corrects any imbalances that might have occurred during intense training.
  • Mental preparation: Tapering not only allows the body to recover but also helps runners mentally prepare for the race. It reduces stress and fatigue, restores motivation and focus, and boosts confidence, enabling runners to approach the race feeling fresh and ready to perform at their best.

During the taper period, runners typically maintain some level of training to keep their bodies active and prevent detraining. However, the overall training load is significantly reduced compared to the peak training phase. The length and degree of the taper (how severe the reduction in training should be) is much discussed, as runners seek to balance recovery with the fear of losing fitness.

The TrainAsONE Adaptive Taper

It is important to note that the TrainAsONE system has no direct, pre-programmed knowledge of the traditional coaching concept of a 'taper' — it does not explicitly schedule a taper simply because a calendar milestone has been reached. Instead, a reduction in training volume emerges naturally and mathematically from its algorithms as it balances performance optimisation with recovery.

Traditional tapering advice is a generic and 'one-size-fits-all' approach. For example, standard training plans typically rely on rigid, static percentage cuts (such as 'reduce your weekly mileage by 20–25% in week one, 40–50% in week two...') regardless of the individual runner's actual state. However, because every runner's recovery rate, physiological response, and training load differ, these static rules are rarely optimal. They risk either leaving a runner under-recovered and carrying fatigue into the race, or over-recovered and losing fitness (de-training) before the starting gun.

In contrast, TrainAsONE moves beyond these static templates. Its advanced machine learning algorithms generate a bespoke taper designed specifically for you. By analysing your unique training history, actual fitness, cardiovascular recovery patterns, and the specific demands of your target goal, TrainAsONE continuously calculates the most optimum balance of volume reduction and intensity maintenance. Furthermore, because TrainAsONE is dynamic, if you miss a session or experience unexpected fatigue in the lead-up to your race, your taper is automatically recalculated to keep you perfectly on track. This ensures you step up to the starting line feeling fresh, motivated, and physically primed for peak performance.

Our Advice for Your TrainAsONE Taper

Our primary advice is to trust the system's logic, with one very important caveat regarding human intuition:

  • Trust the load modelling: The system is balancing your structural durability against your cardiovascular freshness. It will often maintain short, high-intensity efforts close to race day to keep your neuromuscular system primed and prevent you from feeling "stale" or sluggish on the starting line.
  • Erring on the side of caution is okay: From a sports science perspective, it is more difficult to taper too much, but very easy to taper too little. If you are feeling deeply fatigued, carrying minor niggles, or simply feel that your body needs more rest than your schedule suggests, doing less than planned by the system is entirely appropriate. You can reduce your Risk Tolerance or your availability to train, or simply skip or curtail a workout. Listen to your body and be confident you will arrive at the start line feeling fresh and ready to fly.