Reese Witherspoon looks exhausted as she leaves exercise class with no make-up

With the gym junkie actress amping up her fitness regime of late, she looked exhausted yesterday.

Without a scrap of make-up, the 34-year-old was spotted leaving an exercise class in Beverly Hills.

She had taken a Physique 57 class at an exclusive Los Angeles gym.

A new Hollywood exercise fad, the technique teams isometric exercises and orthopaedic stretches to tone muscles and improve posture.

In a black vest and leggings and with her water bottle in tow, she walked back to her car after clearly being put through her paces.