You felt fine leaving the gym, but the stairs hurt the next day. Delayed muscle soreness can follow unfamiliar exercise. The useful question is what to do with your next session. Delayed onset muscle soreness often builds over the following day and can be strongest around twenty four to seventy two hours. That timing is a general pattern, not a way to diagnose every ache. For ordinary soreness, reduce the demand on the affected muscles. An easy walk or a different session may fit better than repeating the same hard workout. Being sore is not a requirement for progress. Check everyday movement first. Can you walk normally and use the usual range of motion without compensating? Sharp pain, joint pain or pain that began suddenly during a repetition needs a different assessment. Keep regular meals, fluids and sleep in the plan. Avoid turning a sore day into several new recovery experiments. Severe muscle pain with marked weakness or dark urine needs urgent medical care. Read on for a next session checklist, soreness versus injury examples and ways to restart after a break. Use the article to organize your training decision, not to chase a soreness score.