Exercise Pain vs. Injury Pain: How to Tell the Difference
Not All Pain Is Bad
Understanding pain during exercise:
Normal/Acceptable:
Not Normal/Concerning:
Types of Exercise-Related Pain
Muscle Burn (During Exercise)
What it is: Lactic acid buildup during hard effort
Characteristics:
Verdict: Safe, expected
DOMS (Delayed Onset Muscle Soreness)
What it is: Muscle soreness 24-72 hours after exercise
Characteristics:
Verdict: Normal, not injury
Muscle Strain (Injury)
What it is: Actual muscle fiber damage
Characteristics:
Verdict: Injury, needs attention
Joint Pain
What it is: Pain from joint structures (not muscle)
Characteristics:
Verdict: Concerning, investigate
Tendon Pain
What it is: Tendon irritation or damage
Characteristics:
Verdict: Needs rest and proper treatment
The Key Questions
1. When Did It Start?
Gradual onset: Often overuse, may be manageable
Sudden during exercise: Could be strain, more concerning
After rest: DOMS is normal; other pain less so
2. Where Is It?
In the muscle belly: More likely muscle-related
At a joint: Joint issue
At tendon (where muscle meets bone): Tendon problem
3. What Type of Pain?
Achey, diffuse: More likely DOMS
Sharp, localized: More concerning
Burning during exercise: Normal
4. Does It Affect Function?
Mild discomfort, normal movement: Likely OK
Causes limping, compensation: More serious
Unable to use at all: Needs evaluation
5. How Long Does It Last?
Resolves within a few days: Likely DOMS
Persists beyond a week: Needs attention
Getting worse: Definitely needs attention
The Traffic Light System
Green Light: Continue
Yellow Light: Modify
Action: Reduce intensity, modify exercise, monitor
Red Light: Stop
Action: Stop, rest, seek evaluation if persists
Managing Exercise Discomfort
For Normal Soreness (DOMS)
For Suspected Injury
Common Scenarios
"It hurts when I squat"
Questions:
If joint pain: May need modification or rest
If muscle fatigue: Likely normal
"My shoulder hurts the day after bench press"
Questions:
If muscle soreness (chest/shoulder muscles): Likely DOMS
If joint pain: May need form check or rest
"I felt a pop during deadlift"
Immediate concern. Stop exercise. Assess function. If significant pain, weakness, or swelling — seek evaluation.
The Bottom Line
Normal exercise pain:
Injury warning signs:
Listen to your body. It's usually telling you something important.
Foundational Rehab teaches appropriate pain management in all programs.