Step by step instructions, muscle activation and variants for the Crunchy Frog on Floor.
The crunchy frog is a bodyweight core exercise performed on the floor that combines a tuck and an open extension. You balance on your tailbone, draw your knees to your chest and wrap your arms around them, then simultaneously extend your legs and open your arms — mimicking a frog's motion — to challenge the entire abdominal wall.
Common mistakes content is coming soon.
The Crunchy Frog on Floor 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.