Descriptive of being of great size, strength, or power: Jack LaLanne, known as the fitness guru, was considered to have titanically powerful muscles as a result of working out so often with weights, swimming, and other physical activities every day.

As a titanically equipped person, LaLanne performed multiple feats of strength and endurance. His first presentation was an underwater swim in 1954 covering the length of the Golden Gate Bridge, loaded with 140 pounds of equipment.

Jack went on to stage for many additional titanically attention-getting events, including completing over a thousand pushups in a little over 20 minutes, and towing 65 boats filled with thousands of pounds of wood pulp in Japan.