Why I deadlift for trail running

I have a home gym with a barbell, a rack, and enough plates to load a deadlift past anything I should be pulling. Three days a week I walk downstairs and do some combination of squats, deadlifts, and bench press. Nothing fancy. Sets of five, mostly. The occasional heavier single when I feel like it.

I do not do this to get bigger or to hit numbers in the gym. I do it because it makes trail running feel easier, keeps me from getting injured, and means I can still do this at 55 and 65. The evidence is stronger than I think most runners realize.

The efficiency case

Running economy is how much energy it costs to run at a given pace. Better economy means less effort at the same speed. In practical terms, the same trail feels easier.

Strength training improves running economy. This is not a contested finding. A review of the evidence found consistent improvements across studies, typically in the range of 2 to 8 percent. The mechanism appears to be neuromuscular. Stronger muscles produce each stride with a smaller fraction of their maximum capacity, which costs less metabolically. Stiffer tendons store and return elastic energy more efficiently.

A study on distance runners who added heavy strength training to their program found improvements in running economy without any increase in body mass. The strength work did not make them heavier. It made each stride cheaper.

This matters more on trails than on roads. Road running is relatively flat and repetitive. Trail running involves constant changes in gradient, footing, and muscle recruitment. Every steep uphill is a strength demand. Every rocky descent is an eccentric demand. A larger strength reserve means each of these moments costs less relative effort. The run feels easier for longer.

The injury case

This is the one that convinced me to keep lifting even when training volume is high.

A meta-analysis of 25 trials found that strength training reduces sports injuries by roughly a third. A follow-up analysis confirmed that the effect is dose-dependent. More strength training, fewer injuries. The effect held across sports and injury types.

For trail and ultra runners specifically, the relevant injuries are overuse. Patellofemoral pain, IT band issues, Achilles tendinopathy, stress fractures. The common factor is load exceeding tissue capacity. Strength training raises the capacity.

I have not had a running injury since I started lifting consistently. I am aware that this is anecdotal and that correlation is not causation. But the mechanism is clear. Stronger muscles, tendons, and connective tissue tolerate more repetitive load before breaking down. The research supports the mechanism. My log supports the outcome.

The descent case

Trail running involves a lot of downhill, and downhill running is eccentric. The muscles lengthen under load with each footstrike. This is what causes the deep muscle soreness that peaks two days after a long mountain run.

Research on neuromuscular fatigue in ultra-marathons shows that the quadriceps can lose 30 to 40 percent of their maximal voluntary contraction force by the end of a mountain ultra. The calves lose a similar amount. This is not just tiredness. It is measurable loss of the muscle's ability to produce force. The descents do most of the damage.

Eccentric strength training, which heavy squats and deadlifts provide, reduces the severity of exercise-induced muscle damage over time. The muscles adapt to eccentric loading. The repeated bout effect is well documented. Regular heavy lifting means the descent damage from a long trail run is smaller and clears faster.

This is the reason I squat heavy even when running volume is high. It is not about getting stronger in the gym. It is about getting to the bottom of a long descent and still being able to enjoy the rest of the day.

What this looks like in practice

Three sessions a week. Squat, deadlift, bench press, with occasional rows and pull-ups. Sets of three to five at a weight that is challenging but not maximal. Total gym time is about 45 minutes per session. I do not train to failure. I do not follow a hypertrophy program. The goal is to maintain a strength base that supports the running and the riding, not to maximize any single lift.

During high-volume running weeks, I reduce the gym to two sessions and lower the intensity. During recovery weeks, the gym stays the same or goes up slightly. The strength work is the constant. The running volume is what fluctuates.

Rønnestad and Mujika's review of strength training for endurance athletes recommends two to three sessions per week of heavy, low-rep work. No need for high-rep endurance-style circuits. The adaptations that improve running economy and injury resilience come from heavy loads and low volume. This aligns with what has worked for me.

The deadlift is not a running exercise. But it makes the running easier and the body more durable. That is the argument for being a hybrid athlete in the first place. Not performance. Longevity.