# Strength training for marathon runners: a guide > Updated: 2026-05-28 · Source: https://dorsi.ai/topics/strength-training-for-marathon-runners Most marathon runners skip strength training. Not because they don't know it matters — but because adding 45 minutes of lifting on top of 50-mile weeks… Most marathoners skip strength training because they think it'll make them bulky or slow. The opposite is true. A single weekly session focused on eccentric load and single-leg work can cut your injury risk by nearly 50% and actually improve your running economy. You don't need heavy deadlifts. You need specific strength that protects your joints during those last five miles. The next section breaks down exactly which lifts translate to faster finish times. Most marathon runners skip strength training. Not because they don't know it matters, but because adding 45 minutes of lifting on top of 50-mile weeks feels impossible. The data says it's worth finding the time: a 2015 meta-analysis found that runners who performed two strength sessions per week reduced overuse injury risk by nearly 50%. You can get the same benefit with shorter, smarter sessions. Dorsi builds workouts that adapt to your daily fatigue, so you're never grinding heavy deadlifts the day after a long run. The key is programming that respects your running load instead of competing with it. Below, we'll walk through the specific strength movements that protect your joints, the weekly schedule that won't kill your long runs, and how to measure progress when your main goal is a faster marathon time, not bigger biceps. ## Why should marathon runners lift heavy? Most runners skip strength because they think it adds bulk. But research shows heavy compounds improve running economy by 2-4% and slash injury risk. You're not after hypertrophy; you want resilient tendons and bones. Stick to low reps (3-5) at high load. That's what actually moves the needle for race day. ## Prioritize the big three: squat, deadlift, lunge These three movements cover what runners underuse. Squats build quad power for hills. Deadlifts target hamstrings and glutes to stabilize your pelvis. Lunges expose left-right imbalances. Perform them twice a week, heavy sets of 5. No need for fancy machines. Get strong at these and you'll run stronger. ## Schedule strength on your easiest running days Put strength on the same day as a recovery run or a rest day. Never do heavy legs before a key speed session or long run. Your CNS needs recovery. If you squat heavy the night before a marathon pace workout, expect sluggish legs. Keep at least 24 hours between heavy lifting and quality running. ## When should you deload strength during marathon training? Cut volume as race day nears but keep intensity. Three weeks out, drop from 3 to 2 sessions and reduce sets. Two weeks out, one session only. Race week, skip it entirely. Goal is fresh legs for race day, not gym PRs. A heavy deadlift the week before the marathon just costs you gains on the road. ## Add unilateral work to fix imbalances Runners develop asymmetries from repeating the same stride. Single-leg Romanian deadlifts and Bulgarian split squats reveal which side is weaker. Do them before compounds to activate stabilizers. 3 sets of 8 per leg, controlled tempo. This simple addition keeps your knees and hips happy through the hardest miles. ## FAQ ### Do marathon runners do strength training? Elite marathoners definitely do, and more amateurs are catching on. Kipchoge famously lifts twice a week, year-round. Strength training improves running economy, reduces injury risk, and builds power for hills and final kicks. The hard part is balancing it with high mileage without compromising recovery. Most runners skip it because it's uncomfortable, but the payoff is real. ### What is the 10-10-10 rule for marathons? The 10-10-10 rule splits a marathon into thirds: first 10 miles controlled, next 10 miles at goal pace, last 10k empty the tank. It's not about exact splits but mindset. Many blow up attacking mile 1 like a 5k. The rule forces patience early, disciplined pacing mid-race, and a hard finish when everyone else is fading. Practically, negative split people outperform positive splitters almost every time. ### What is the 3 3 3 rule for training? The 3-3-3 rule means three days of hard training, three easy days, three days off per week? No, that's the old bro-science. The real version: three runs per week minimum, three strength sessions, and three rest days. No one does that simultaneously. More practical: pick two hard quality sessions, one long run, and two strength sessions. The 3-3-3 is a guideline to avoid doing too much junk volume. ### Will strength training lower blood sugar? Yes, acutely and chronically. A single heavy session can drop glucose for 24, 48 hours post-workout because muscles pull sugar from the bloodstream to repair tissue. Over weeks, more muscle mass means better insulin sensitivity. For runners, strength training helps regulate blood sugar more consistently than extra easy miles. But time it right, lifting right before a long run can cause early bonking if glycogen is low.