The best replacement for sore muscles is shin splints.

The best alternatives to sore muscles are rated as following:
★★★★★  shin splints
★★★  chest pain
★  heat

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Speaking about sore muscles, one probably shouldn't forget about working out.

Other search terms related to sore muscles and their ratings are:
★★★★★ working out
★ workout
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Google Trends

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sore muscles
shin splints
chest pain