Step by step instructions, muscle activation and variants for the Alternate Frog Crunch.
A floor-based core exercise performed with the legs in a wide frog position, alternating knee drives toward the chest in a crunch motion. It targets the abs and obliques while the frog stance adds an inner-thigh stretch component.
The Alternate Frog Crunch is a foundational movement that builds strength and muscle through controlled, progressive overload. Train it 1 to 2 times per week with 3 to 5 working sets per session, gradually adding weight or reps as form holds up.
