Frog Crunch 101 Video Tutorial
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Exercise Synopsis
Target Muscle Group
Abs
Secondary Targets
Execution
Isolation
Force Type
Core
Required Equipment
Bodyweight
Fitness Level
Intermediate
Variations
Alternatives
None
Timer
Hour
Minute
Second
Stopwatch
00:00:00:00
Overview
The Frog Crunch is a bodyweight abdominal exercise performed lying on the floor with the soles of the feet pressed together and knees opened outward, combining an upper-body crunch with a controlled hip lift to maximize core engagement. By curling the torso upward while simultaneously drawing the thighs toward the chest, the movement places strong emphasis on the abdominal muscles while the hip flexors assist in lifting and stabilizing the legs. This exercise is effective for developing abdominal strength and control, with a compact range of motion that helps maintain constant tension on the core throughout each repetition.
How to Perform
Position yourself flat on your back on the floor, interlace your fingers lightly behind your head, allow your knees to fall outward, and place the soles of your feet together.
Brace your core, keep your lower back gently pressed into the floor, and maintain a relaxed neck position with your elbows open.
As you exhale, lift your upper torso off the ground by contracting your abdominal muscles while simultaneously drawing your thighs upward toward your chest.
Continue the movement until your shoulders are clearly elevated and your knees move close toward your midsection, maintaining control and tension through the abs.
Pause briefly at the top while keeping the movement smooth and avoiding any pulling on the head or neck.
Inhale as you slowly lower your torso and legs back down, returning to the starting position with full control and continuous core engagement.
★ Bonus: For exercises that involve external weights (such as dumbbells, barbells, or machines), the One Rep Max (1RM) calculator can help you estimate your maximum lifting capacity. Use it to track your strength progress and adjust your training for optimal results.
Tips
Do not use your hands to yank or support the movement of your head, as this places unnecessary strain on the neck.
Keep your neck relaxed and allow the abdominal muscles to initiate and control the lifting motion.
How Not to Perform
Do not pull on your head or neck with your hands, as this shifts the workload away from the abs and increases neck strain.
Do not let your lower back arch off the floor, since this reduces abdominal engagement and places stress on the spine.
Do not swing or use momentum to lift your legs, as this wastes energy and transfers effort to the hip flexors.
Do not rush through the repetitions, because fast movements limit time under tension in the abdominal muscles.
Do not flare your elbows forward or collapse them inward, as this disrupts upper-body alignment and balance.
Do not allow your feet to separate or your knees to lose their outward position, as this alters the mechanics of the exercise.
Do not hold your breath throughout the movement, since improper breathing reduces core control and stability.
Variations
Variations of fitness exercises refer to different ways of performing a specific exercise or movement to target various muscle groups, intensities, or goals. These variations aim to challenge the body differently, prevent plateaus, and cater to individuals with varying fitness levels.
Alternatives
Alternative exercises in fitness refer to different movements or activities that target similar muscle groups or serve the same training purpose as the primary exercise. These alternative exercises can be used as substitutes when the original exercise is unavailable or challenging to perform due to various reasons such as equipment limitations, injuries, or personal preferences.
