Muscle Beach is the birthplace of the United States physical fitness boom, which started in 1934 with predominantly gymnastics activities on the south side of the Santa Monica Pier. Muscle Beach Venice is the contemporary title of the outdoor weightlifting platform constructed in Venice, California, a distinct neighborhood in the city of Los Angeles, …Muscle Beach is the birthplace of the United States physical fitness boom, which started in 1934 with predominantly gymnastics activities on the south side of the Santa Monica Pier. Muscle Beach Venice is the contemporary title of the outdoor weightlifting platform constructed in Venice, California, a distinct neighborhood in the city of Los Angeles, 18 years after Muscle Beach was established.