Mother-daughter fitness experts Liz Hilliard and Clary Hilliard Gray bring their cutting-edge workout, HSM | Core, to Stonecrest in South Charlotte. Classes start Thursday, June 1, at 5:30 a.m. HSM | Core mixes Lagree Fitness with Hilliard Studio Method on a state-of-the-art machine called the megaformer M3S to target core muscles, burn fat and improve the health of the spine in its 40-minute, heart-pumping class. HSM | Core is for everyone! It’s a high intensity, but low impact workout, …