Amanda Bynes is obviously benefiting from that endorphin rush.
The 28-year-old was all smiles while leaving a Cardio Barre studio near her parents' home in Thousand Oaks, Calif., her blond hair bouncing and her bod looking as fit as ever in leggings and a black T-shirt.
As usual, she kept her eyes shielded behind oversize shades. Black flip-flops showed off red polish on her toes.
Bynes has apeared increasingly happy and healthy since she enrolled in fashion school earlier this year after spending time in treatment and cleaning up the legal messes of varying sizes that she got into over the last two years.