You can watch complete episodes of his old fitness show -- clearly launched before the invention of cue cards and the notion that frequent organ-music accompaniment can be off-putting -- at Jack LaLanne.com.
From the Chronicle:
Mr. LaLanne was born in San Francisco on Sept. 26, 1914, to French immigrants. They lived in Berkeley, where Mr. LaLanne described himself as a skinny, pimply kid addicted to sugar.
His behavioral problems were extreme. He attacked his brother, attempted suicide and tried to burn down his house. His overweight father died of a heart attack at 50.
I was "a miserable goddamn kid," Mr. LaLanne told The Chronicle. "It was like hell."
Then he heard a speech at the Oakland Women's City Club by Paul Bragg, who opened the nation's first health-food store...
In 1936, he opened Jack LaLanne's Physical Culture Studio in Oakland. Business was slow, so Mr. LaLanne offered massages to get people in the door. Once they started weight lifting, he would suggest routines and call them on the phone if they missed two or more workouts.
"How am I gonna help you if you're not here?" he would ask.
In 1951, he started a live exercise show on KGO-TV in San Francisco. The "Jack LaLanne Show" went national in 1959 and ran for 34 years in the United States and Europe.
Mr. LaLanne became known for great feats of strength. At 40, he towed a 2,000-pound cabin cruiser as he swam the Golden Gate Channel. When he was 42, he did a record 1,033 pushups in 23 minutes.
When he was 60, Mr. LaLanne swam from Alcatraz to Fisherman's Wharf - while handcuffed, shackled and towing a boat. (Full article)
Newsreel footage of LaLanne's famous Alcatraz swim, from CNN:
From The Today Show:
From KGO, LaLanne in San Francisco for his 95th birthday last year:
Jack LaLanne on "pooped-out-itis," from "The Jack LaLanne Show"