Don't lift heavy right before a key run
Low confidence
Lifting heavy before a hard run can leave the legs flat for it, and running economy (how much energy each stride costs) can stay a little worse for up to about a day. Putting the lift after key runs or on another day avoids that. If strength matters more that day, lifting first favors strength gains. The evidence on timing is thin, so treat this as a sensible default rather than a rule.
Why it works
Heavy lifting fatigues the legs and can cause minor muscle damage, and for up to about a day running economy can dip. This is drawn from the acute studies Suc 2022 reviews, not from trials of run-lift scheduling.
What it means in practice
Place strength work after an easy run or on its own day, away from a hard session or long run. When a run and a lift share one session and the run matters most, run first. Lift first only when building strength is the priority.
The evidence
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Lifting before endurance work in the same session built more lower-body dynamic strength than running first. Order changed nothing for isometric strength, maximal aerobic capacity, or body fat. So when protecting strength is the goal, lift before you run. Most included studies used untrained or recreationally active adults, not distance runners, which makes this a sequencing signal more than a runner-specific rule.
n=245
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Foot-ankle strengthening (Taddei 2020) was associated with a running injury incidence 2.42 times higher in controls over a one-year intervention, and in a soldier cohort resistance exercise at least 3 times per week was associated with 54% lower injury risk than doing none or less than weekly. Six weeks of neuromuscular training (jumping, landing, strength, endurance, agility, trunk) lowered injury incidence in track and field, most clearly for MTSS (p=0.012), though the authors call it a very small study (n = 22) with limited generalizability. The same section reports null results (a trial in 1020 soldiers, p = 0.162; a strength program for NYC marathon runners, p = 0.90; stretching in 1538 soldiers), and the review concludes that lower-limb resistance exercise may help reduce running-related injury risk but further evidence is needed. Trail-runner risk factors include running experience, skipped warm-ups, no specialized plan, asphalt training, and double daily sessions. More than 70% of running injuries are overuse, but inadequate technique and poor neuromuscular control are also key mechanisms.
Why we call confidence low
Low: no study in the corpus tests run quality after lifting, run-first versus lift-first for the run, or how long a gap is enough. Suc 2022 is a narrative review citing studies in which strength and plyometric work acutely worsened running economy and muscle activation, with the effect gone within about 24 hours, and some damage studies found no economy change. Eddens 2017 pooled 10 concurrent-training studies (mostly untrained adults) and found lifting first built more lower-body strength, with no order effect on VO2max.
Where it applies
Runners who do both strength and endurance work in the same week or day.
Does not apply to: athletes with ample recovery between sessions, where order matters less.
Last reviewed Oct 14, 2026. See how we score.