# Strength training plan for ultra marathon preparation > Updated: 2026-05-28 · Source: https://dorsi.ai/topics/ultra-marathon-strength-training Ultra endurance athletes often skimp on strength. Logging long miles feels like enough. But the research disagrees: runners who do two strength sessions… For ultra marathon strength training, skip the heavy squats. Race day isn't a max test. It's eighty kilometers of holding form while glycogen runs out and muscles start to degrade. Dorsi's adaptive plan prioritizes leg stiffness and eccentric control, the qualities that keep you upright at mile forty. One study found runners cutting race times by 3% with just two strength sessions per week. The page below shows you how to build that program without adding fatigue. Ultra endurance athletes often skimp on strength. Logging long miles feels like enough. But the research disagrees: runners who do two strength sessions per week cut their injury risk by roughly 50%. That's not about bulking up. It's about connective tissue tolerance, bone density, and preserving power when your legs are wrecked at mile 60. One of the common pitfalls I see is overcomplicating the strength work. People spend more time planning than lifting. You can get a great workout in 20 minutes with zero planning. Dorsi handles that kind of on-the-fly adaptation. The point is consistency over complexity. This page covers how to structure strength for ultra goals without adding junk volume. ## Build a Strength Base That Lasts 100 Miles Focus on compound lifts that transfer: trap-bar deadlifts, front squats, and single-leg RDLs. Skip the leg extensions. You need tendon resilience, not pumped quads. Two to three heavy sessions per week for 12 weeks. Keep reps low: 3, 5 per set. Your goal is force production, not hypertrophy. A runner with a 2x bodyweight deadlift holds form longer at mile 80. ## How often should you lift during a peak week? Don't stop cold. That kills neuromuscular readiness. Step one: cut volume by half. Keep the same loads but drop sets from 4 to 2. Step two: stop lifting entirely 4 days out from race day. One heavy session early in the week then full rest. Your legs will feel fresh on the start line without losing strength. ## Prioritize Eccentric Control for Downhill Protection Downhill running destroys quads. The cure is heavy eccentrics. Use tempo descents on your squats: lower for 3 seconds, explode up. Weighted step-downs from a high box are brutal and effective. Start 8 weeks before your race. Do them after your main lift. Your quads will thank you at mile 90 when everyone else is shuffling. ## Auto-regulate your top sets with morning readiness Some days you're beat. That's when a smart coach like Dorsi reads your HRV and adjusts the load. Other days, you feel strong and can push past planned weight. If you don't have Dorsi, use a simple morning test: five bodyweight squats. Feel heavy? Drop working sets by 10%. Feel snappy? Go for it. Listen to your body, not a static plan.