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What are muscle knots? An exercise physiologist explains what those tight little lumps are and how to get rid of them
The knots are myofascial trigger points that can limit motion, and experts say most resolve within a week or two with stretching, massage or foam rolling.
The tight lumps felt in muscles, called myofascial trigger points, range in size from a marble to a golf ball.
Muscle damage causes inflammation in muscle bands and the fascial layer above, leading to these knots.
These lumps are tender and can cause pain or restrict movement during activities.
Myofascial trigger points often arise from irritation due to new or more intense repetitive motions.