Michele Sabia, the massage director at Oasis Day Spa, shared an easy self-massage technique with The Post — plus her very own bathtub recipe ... soak both feet in hot water, then add Epsom salts ...

Here's a simple recipe ... soak for 15 minutes, pat skin dry and apply lotion to seal in moisture. If you're dealing with soreness, achy joints or tense muscles, slipping into an Epsom salt ...