The short answer
During a marathon taper, reduce strength-training volume and fatigue first. Keep only familiar movements and small exposures that leave normal movement intact. Do not train to failure, introduce new exercises, or try to preserve gym fitness with a last hard session.
Endurance taper evidence broadly favors lower training volume while retaining some intensity and frequency, but it does not prescribe one exact strength plan for every recreational marathoner.1 The right adjustment depends on your normal lifting, soreness response, race date, injury history, and running taper.
Use a three-part filter
Keep a strength exercise only if all three are true:
- Familiar: you have used the movement consistently in the current block.
- Recoverable: the dose does not normally change your running or daily movement beyond the next day.
- Useful: it preserves a known training rhythm or technical quality rather than proving fitness.
If an exercise fails the filter, remove it. Taper weeks are not the place to try a new single-leg variation, chase a personal best, or copy a race-week circuit.
Adjust the dose, not just the calendar
“I still lift twice” does not mean the strength load stayed the same. Track the parts that create fatigue:
- number of hard sets;
- repetitions near failure;
- eccentric loading that causes soreness;
- unfamiliar range of motion;
- session duration;
- placement next to key runs;
- jumps, sprints, or plyometrics not already habitual.
Reducing sets is usually the simplest first lever. Keep the load and movement familiar only when that choice is well practised and leaves ample repetitions in reserve. Evidence on minimum effective resistance-training dose suggests that strength can be maintained with far less work than is often used to build it, but the literature does not establish a marathon-specific taper formula.2
A three-week decision template
| Time before race | Strength-training job | Remove |
|---|---|---|
| About 3 weeks | Begin reducing total hard sets; keep familiar patterns | Failure, new movements, novelty-driven soreness |
| About 2 weeks | Small technique-preserving dose; protect key running | Heavy fatigue, long accessories, catch-up work |
| Race week | Optional brief familiar primer only if reliably helpful | Strength development, maximal loading, soreness risk |
This is a framework, not a schedule prescription. An athlete who normally lifts twice weekly and recovers quickly has a different decision from an athlete whose strength work has been inconsistent. If you have not lifted regularly, the taper is not the time to restart.
Three weeks out: stop building
The marathon-specific training block is nearly complete. Strength work should stop competing with the final important running and recovery.
Keep a small number of familiar patterns:
- squat or split-squat pattern;
- hinge pattern;
- calf or lower-leg work;
- trunk or upper-body work already in the plan.
Reduce sets before changing everything else. Finish each set with clean technique and obvious reserve. Do not add an accessory because another exercise disappeared.
Concurrent strength-and-endurance evidence shows that the two can be trained together, but programming and fatigue management affect the outcome.3 At this point, a session's value should be judged by whether it protects the marathon plan, not whether it looks complete on paper.
Two weeks out: preserve confidence, not fatigue
Use the smallest familiar exposure that helps you feel coordinated. For many trained runners, that means fewer exercises and fewer sets. Place the session far enough from the final demanding run that you already know recovery is reliable.
If normal stairs, easy running, or stride mechanics feel different the following day, the dose was too high for the taper's purpose. Do not repeat it because it was written in the original plan.
Large observational data from more than 158,000 recreational marathon runners found that disciplined reductions in running volume over longer tapers were associated with better outcomes than minimal or inconsistent tapers.4 That study did not test strength sessions, but it reinforces the broader job of the period: remove accumulated load coherently.
Race week: optional means optional
A race-week strength primer should be:
- short;
- familiar;
- far from failure;
- free of novel eccentric load;
- easy to remove after travel, illness, pain, or poor recovery.
Some runners feel better with brief movement contact; others do better with no formal lifting. Evidence supporting retained intensity in endurance tapers cannot be translated into a universal instruction to lift heavy during marathon race week.1
Use simple bodyweight or lightly loaded familiar movements only if they have an established place in your taper. A session that produces uncertainty has failed its job.
What about heavy load?
“Keep intensity” is often misread as “keep the heaviest barbell day.” In taper research, intensity describes endurance-training intensity within a reduced-volume plan.1 It does not automatically authorize a maximal or near-maximal strength session.
An experienced runner-lifter may tolerate a small number of familiar, non-grinding repetitions at a meaningful load. Another athlete may experience soreness, poor sleep, or altered running mechanics. The personal response from earlier weeks is more useful than a generic percentage.
Never test a one-repetition maximum in the taper.
What about calves, feet, and injury-prevention work?
Keep only the dose already tolerated. Rehabilitation or clinician-prescribed exercises should be adjusted with the clinician rather than replaced by a generic race-week template. A sudden increase in calf raises, plyometrics, or range can create exactly the soreness the taper is meant to avoid.
Strength training can support distance-running performance, but methods and responses vary.5 The presence of long-term benefit does not mean more work is better in the final days.
Use a next-day traffic light
Green
Normal walking, normal easy-running mechanics, no meaningful soreness, normal sleep and appetite. Keep or slightly reduce the next planned dose.
Amber
Unusual heaviness, mild movement change, or delayed soreness. Remove optional work and reduce the next dose.
Red
Sharp or escalating pain, limping, substantial swelling, major loss of function, or systemic illness. Stop training and seek appropriate assessment.
Running under fatigue can change biomechanics, but the relationship between training variables and injury is complex.6 The traffic light is a conservative decision aid, not a diagnosis.
Do not repay missed strength
Missed sessions during the taper are not debt. Do not stack two sessions, add sets, or combine strength with a hard run to make the calendar look complete. Recovery, sleep, and logistics have more immediate value than a catch-up stimulus that cannot be adapted to before the race.
Sleep deprivation can impair endurance performance.8 If the only way to keep a primer is to shorten sleep, remove the primer.
26weeks.ai adapts the taper around completed training, missed days, and the actual race date. Start training now.
This guide is educational and not medical advice or individual training clearance. New or worsening pain, chest symptoms, fainting, severe breathing difficulty, acute illness, or major loss of function requires appropriate assessment.
References
- Wang Z, et al. Effects of tapering on endurance performance: systematic review and meta-analysis. (PubMed)
- Spiering BA, et al. Maintaining physical performance: minimum dose of exercise. (PubMed)
- Huiberts RO, et al. Concurrent strength and endurance training: systematic review and meta-analysis. (PubMed)
- Smyth B, Lawlor A. Longer disciplined tapers and marathon performance in recreational runners. (PubMed)
- Llanos-Lagos C, et al. Strength-training methods and distance-running performance. (PubMed)
- Van Hooren B, et al. Running biomechanics under fatigue: systematic review. (PubMed)
- Fredette A, et al. Running injuries and training parameters: systematic review. (PubMed)
- Craven J, et al. Sleep deprivation and endurance performance: systematic review and meta-analysis. (PubMed)