Why can a hard workout feel manageable at first, only to leave you struggling with stairs two days later? In this episode of The Athletes Compass Podcast, Paul Warloski and Dr. Paul Laursen explain delayed onset muscle soreness, or DOMS, and the role eccentric muscle contractions play in creating microscopic muscle damage. They explore why downhill running is especially punishing, how the repeated bout effect makes athletes more resilient, and why sport-specific preparation matters even for highly trained athletes. The conversation also covers protein timing, sleep, BCAAs, caffeine, hydration, warm-ups, and practical ways to decide whether soreness is mild enough to train through—or a sign that recovery should take priority.

• DOMS usually peaks around 24–72 hours after unfamiliar or demanding exercise.
• Eccentric contractions—when a muscle lengthens while producing force—are a major trigger for soreness.
• Downhill running creates particularly high eccentric loading and should be introduced progressively.
• Soreness is not required for an effective workout and should not be treated as the goal.
• The repeated bout effect means the body experiences less damage and soreness after repeated exposure to the same movement.
• Athletes should prepare for the specific mechanical demands of their event, not just its cardiovascular demands.
• Gentle movement may help mild soreness feel better, but severe soreness requires patience and reduced loading.
• Total daily protein intake is likely more important than hitting a narrow post-workout “anabolic window.”
• Sleep supports the repair and adaptation processes that occur after training.
• Caffeine may reduce the perception of discomfort, but masking soreness can make it easier to overreach.
• A practical warm-up test can help guide training: if mild soreness improves as you move, the session may be manageable; if it persists or worsens, backing off is prudent.
• The most important workout is often the next workout, so today’s session should not create more damage than the training plan can absorb.

• Dr. Paul Laursen
• Paul Warloski - Simple Endurance Coaching