Strength training for HYROX®: lifts, sets and reps

Do I need strength training for a fitness race?

Yes. The stations are strength tasks that you do while tired, and the runs between them depend on how well your legs cope with that. Research on endurance athletes supports lifting: a meta-analysis of 28 studies found that strength training gave a moderate improvement in middle- and long-distance performance.

In that analysis the effect size was 0.52, and the energy cost of moving (running economy, for runners) improved with an effect size of 0.65. Training with maximal force produced larger gains than other intensities. A review of runners and cyclists also found that both heavy and explosive strength training improve running economy.

Max strength or muscular endurance: which should I train?

Train max strength first and muscular endurance second. Heavy lifting raises the force ceiling that every station sits under, while the stations, station circuits and compromised runs already teach you to repeat submaximal efforts. The ACSM ranges below frame the difference, and the split between them is our recommendation.

RM means repetition maximum: the load you can lift that many times with good form. You do not need a one-rep max test. Pick a load that leaves you 1 to 2 reps short of failure (our recommendation) and raise it when you can finish every set.

Which lifts help with each fitness race station?

Each station leans on a few muscle groups, and a handful of lifts covers all eight. The table is our recommendation, based on the movement each station demands, not a measured result. Learn the lifts with light loads, then add weight slowly.

For technique and pacing on individual stations, read the sled push guide and the stations and weights guide. Race loads differ by division, so confirm the loads for your season in the official rulebook.

How many sets and reps should I do in each phase?

Start with 3 sets of 8 to 12 reps in the base phase, move to 3 to 4 sets of 5 to 8 reps in the build phase, then cut to 2 to 3 sets of 3 to 6 reps in the peak. These numbers are our recommendation, built from the ACSM ranges above and matched to the phases of the 12-week plan.

• ACSM progression rule: raise the load by 2 to 10 percent once you can do one to two extra reps with the current load.
• Rest 2 to 3 minutes between heavy sets (our recommendation).
• Use 2 or 3 lifts per session, one each for squat, hinge and pull. More than that eats into your running.
• In deload weeks 4 and 8, cut the number of sets by about a third and keep the load.

Where does strength training fit in the training week?

Lift after a rest day or an easy day, and keep heavy leg work at least a day before a quality run or the long mixed session. In the 12-week plan that is session B. Aim for one main lifting session and, if you can, a second short one.

A 2018 meta-analysis of 10 studies found that lifting before endurance work gave about 7 percent larger gains in lower-body dynamic strength than the reverse order. So when you double up, lift first if strength is the goal, and run first if the run is the key session. The full week templates are in the weekly training structure guide.

Does running ruin my strength gains?

Mostly not. An updated 2022 meta-analysis of 43 studies found that adding aerobic training did not significantly change maximal strength or muscle size compared with strength training alone, but it did reduce explosive strength, especially when both were in the same session. The risk is real but manageable.

An older 2012 meta-analysis of 21 studies found that running, but not cycling, reduced gains in muscle size and strength, and that more frequent and longer endurance work reduced them further. Fitness racing has a lot of running, so expect your lifts to plateau as your run volume rises.

• Keep most of your running easy, so it does not eat into the recovery your lifting needs.
• Space lifting and hard runs by a day, or by about three hours when you must double up.
• Do not chase new personal bests in the big lifts while your run volume is at its highest. Hold your strength instead.
• Treat explosive work, such as jumps and throws, as a short, fresh part of session B, not something to tack on after a hard run.

How should I handle strength in the taper, and when should I stop?

Stop heavy leg lifting after week 10 of a 12-week plan, keep the loads light in weeks 11 and 12, and skip lifting in the last few days. Strength is kept for weeks, while fatigue from a heavy session can follow you into the race. This is our recommendation.

• Week 11: one short, light session, upper body or low-load legs, 1 to 2 sets of about 5 reps.
• Week 12: skip lifting, or do a few light sets early in the week.
• Do not try a new lift, a new load or a new technique in the final two weeks.
• If you miss a lifting week through illness or travel, repeat the week before it and do not try to catch up.

Can Tuffr track my strength training?

Tuffr is an iPhone app for athletes who train for fitness races and triathlon. It is not public yet: the closed beta is due by 30 November 2026, and a small group goes first. For lifting, we are building two things.

• A gym log for sets, weights and rest, kept in the same plan as your running and cycling.
• Coach AI, which proposes changes to your plan. You see what would change and why, and only what you approve reaches your calendar.