Lifting Barefoot vs. With Shoes: What Trail Runners Need to Know

Walk into any serious lifting gym and you'll notice that a meaningful proportion of the people squatting heavy are either barefoot or in socks. This tends to confuse runners, who spend considerable effort selecting footwear for every other athletic context and assume the gym should be no different. The question of whether to lift barefoot, in minimalist shoes, or in standard training shoes is worth examining carefully – particularly for trail runners, who have both specific foot mechanics and specific training goals that make the answer more nuanced than it might appear.

What Footwear Does to a Lift

The central issue is heel elevation. Most standard training shoes – and almost all running shoes – have a measurable heel-to-toe drop, typically between 8 mm and 12 mm. In everyday movement this is inconsequential, but under a loaded barbell it changes the mechanics of the lift in ways that matter.

In a back squat or Romanian deadlift, heel elevation shifts the load anteriorly – forward, onto the quads – and reduces the range of motion demand at the ankle. For lifters with limited ankle dorsiflexion, this can actually be useful, allowing them to reach depth without the heel rising or the torso collapsing forward. But for most trail runners, who tend to have reasonable ankle mobility from years of uneven terrain, the heel elevation in a standard trainer is more likely to be a crutch that masks a mobility deficit than a genuine mechanical advantage. It also reduces posterior chain activation – the glutes and hamstrings contribute less when the load is shifted forward – which is precisely the opposite of what trail runners are trying to achieve.

A flat shoe or bare foot removes this variable entirely. With zero heel elevation, the squat is mechanically honest: if ankle mobility is the limiting factor, it shows immediately, and the lift can be used as a diagnostic as much as a training stimulus. The posterior chain is loaded more fully, the foot has direct contact with the floor, and proprioceptive feedback – the sensory information the foot sends to the nervous system about ground position and load distribution – is significantly richer.

The Case for Lifting Shoes

The argument for purpose-built weightlifting shoes – the hard-soled, elevated-heel shoes used in Olympic lifting and powerlifting – is stronger than the argument for standard running shoes, and worth acknowledging honestly.

Weightlifting shoes have a heel elevation of around 15–25 mm, but unlike the soft, compressible heel of a running shoe, the heel is rigid. This matters because under a heavy squat, a compressible midsole deforms under load, creating instability at the base of the lift – exactly what you don't want when a heavy barbell is on your back. A rigid heel, elevated or not, provides a stable platform. Studies comparing squat mechanics in weightlifting shoes versus flat shoes consistently show greater trunk upright position and increased knee flexion in weightlifting shoes, which can be advantageous for quad-dominant squat variations.

For trail runners, however, the primary squat goal is posterior chain loading rather than maximal quad recruitment, and the trunk uprightness advantage of weightlifting shoes works against that goal. They are also largely unnecessary for the deadlift – most coaches cue a flat foot or even a slight heel-down position for conventional and Romanian deadlifts, which weightlifting shoes actively work against.

The verdict on lifting shoes: useful for runners who are specifically working on squat depth due to ankle mobility limitations, unnecessary for most, and counterproductive for heavy deadlift variations.

Lifting Barefoot – The Proprioception Argument for Trail Running

This last point deserves more attention than it typically gets. The foot contains a dense concentration of mechanoreceptors – sensory receptors that detect pressure, stretch, and positional change – and the quality of the signal they send to the nervous system is directly affected by what's on the foot. A thick, cushioned midsole attenuates this signal. Lifting in a maximally cushioned training shoe is, from a proprioceptive standpoint, roughly analogous to wearing gloves to do grip-intensive pulling work: the feedback is muted at precisely the point where precision matters most.

For trail runners, this has a specific relevance. A significant part of trail running performance – and injury resilience – is foot and ankle proprioception: the ability to sense and respond to uneven terrain in real time. Lifting barefoot, or in a minimal flat shoe, trains the foot's sensory and stabilising structures under load, which carries over to more competent foot function on technical trails. It is a small effect, but it compounds over months of consistent training.

Practical Guidance

For trail runners doing compound lower-body strength work, the order of preference is broadly: barefoot or socks first, a flat minimalist shoe second, a hard-soled lifting shoe third if ankle mobility is a genuine limiting factor, and a standard running or training shoe last. The running shoe is the worst option not because it is dramatically harmful, but because it actively works against the posterior chain loading and proprioceptive richness that make strength training transfer to trail performance.

Two caveats worth noting. First, gym policy: not all gyms permit barefoot lifting, and for those that don't, a thin flat shoe – a minimalist trainer, a wrestling shoe, or even a flat-soled cross-trainer – is a functionally equivalent substitute. Second, transition: if you've been lifting in cushioned shoes for years and switch to barefoot or minimal footwear abruptly, the foot's stabilising musculature will need time to adapt to bearing load without support. Reduce weight by 10–15% for the first two to three weeks and build back progressively.

Conclusion

The choice of footwear in the gym is not trivial for trail runners, because the same principles that govern foot mechanics on the trail – proprioceptive richness, posterior chain engagement, stable ground contact – apply under the barbell as well. Lifting barefoot or in flat shoes is the configuration most consistent with the mechanical goals of a trail runner's strength programme. It is also, not coincidentally, the configuration used by most serious strength athletes – not out of tradition, but because the floor is the most stable platform available, and the foot functions best when it can feel it directly.

For more on the strength training movements most relevant to trail running performance, read our post on Barbell, Dumbbell, or Bodyweight: What Actually Moves the Needle for Trail Runners?