Sounds like Delayed Onset Muscle Soreness (DOMS). It's pretty common when you try something new your muscles are unfamiliar with.
Continue to work out regularly (the increased blood flow to the muscles helps the recovery process), but dial back the intensity for a week or two until your muscles adapt to the new demands you are making of them.
The reasonable man adapts himself to the world; the unreasonable one persists in trying to adapt the world to himself. Therefore all progress depends on the unreasonable man.
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