She may have written the book on crime-solving, but Angela Lansbury also seems to have penned a chapter on fitness. In a 1988 exercise video, the now 86-year-old takes us through her daily health routine (h/t Vulture).

"Spend about 20 minutes with me and we will stretch some more and then have some fun with what I call feeling free," Lansbury tells viewers.

But Lansbury isn't the only one with a "feel the burn" video past. Shirley MacLaine, Marky Mark and Marie Osmond have all lunged in front of the camera to share their fitness secrets.

Check out these celebrity workout videos below and head over to Vulture for more.

Also on HuffPost:

Loading Slideshow...
  • Hilary Duff

  • Scarlett Johansson

  • Kimberly Stewart

  • Katy Perry

  • Cameron Diaz

  • Jennifer Garner

  • Sandra Bullock

  • Charlize Theron

  • Vanessa Hudgens

  • Kim Kardashian

  • Zoe Saldana

  • Amanda Seyfried

  • Reese Witherspoon

  • Rosie Huntington-Whiteley

  • Minka Kelly

  • Jennifer Lawrence

  • Jordana Brewster

  • January Jones

    (Pacific Coast News)

  • Salma Hayek

    (FameFlynet)

  • Jessica Biel

    (Pacific Coast News)

  • Dakota Fanning

    (Pacific Coast News)

  • Hilary Duff

    (Pacific Coast News)

  • Heather Morris

    (Pacific Coast News)

  • Emily Blunt

    (Pacific Coast News)

  • Zooey Deschanel

    (Pacific Coast News)

  • Ashley Greene

    (Pacific Coast News)

  • Nikki Reed

    (Pacific Coast News)

  • Kim Kardashian

    (Pacific Coast News)

  • Snooki and JWoww

    (Pacific Coast News)

  • Ashley Benson

    (Pacific Coast News)

  • Megan Fox

    (Pacific Coast News)

  • Maria Menounos

    (Pacific Coast News)

  • Courtney Robertson

    (Pacific Coast News)

  • Miley Cyrus

    (Pacific Coast News)

  • Miley Cyrus

    (Pacific Coast News)

  • Sandra Bullock

    (Pacific Coast News)

  • Elizabeth Berkley

  • Jennifer Hudson

    (Pacific Coast News)