Dumbbell Single Arm Starfish Crunch (Beginner)
Exercise info
| Primary muscles |  Abs |
|---|---|
| Secondary muscles | Obliques |
| Equipment |  Dumbbell |
| Movement pattern | Core |
| Rep range | 10–20 reps (one side at a time) |
36 similar exercises
Representative exercise: Half Jackknife
- Half Jackknife
- Starfish Crunch (beginner) without mat
- Single Starfish Crunch
- V-Up
- Jackknife
- Bicycle V-Up
- Pilates Teaser
- Suitcase Crunch
- Jackknife Floor
- Jackknife Sit-Up
- Jack Split Crunch
- Leg-Up Crunch Bottle Pass
- Bodyweight Lying Oblique V-Up
- Flexion Leg Sit-up (Straight Arm)
- V-Up with Clap
- Alternating Leg V Up
- Jackknife Sit-Up (Demo 2)
- Jackknife Sit-Up (Demo 3)
- Medicine Ball Alternating V-Up
- Weighted V-Up Passes with Pad
- Seated Straight Leg Crunch on Chair
- Dumbbell Alternate V-Up
- Band Jackknife Sit-up (Demo 2)
- Stability Ball V-Up Pass
- Atomic Sit-Up
- V-Sit Toe Tap
- Dumbbell V-up
- Dumbbell Lying Oblique V-up
- Band v-up
- Band Jackknife Sit-Up
- Weighted Plate Jackknife Sit Up
- EZ Barbell Legs Side Pull In Sit-up
- Dumbbell V-up (VERSION 2)
- Dumbbell V-up (VERSION 3)
- Band v-up (Demo 2)
- Weighted V-Crunch (on bosu ball)
How GYMKC sets the weight for this exercise
For example, if you do 10 reps with 12 kg in each hand and log that you could have done about 2 more, GYMKC estimates your 1RM per hand at about 17.3 kg.
With the dumbbell, each step is 2 kg (5 lb), so the next weight is 14 kg per hand. Within your 10–20 reps target, the sets you log decide whether to add reps first or add weight.
These numbers are an example of how the calculation works. Your actual prescription is recalculated every set from your own records. See how the calculation works
Related exercises
Lying Toe TapEasierDead BugEasierDumbbell Overhead Sit-upHarderDumbbell Decline Sit-upHarderLying Alternate Bent Leg RaiseSimilar exerciseMachine Lying CrunchSimilar exerciseBarbell RolloutSimilar exerciseBand Kneeling CrunchSame muscle · different equipment
This information is based on our analysis of public content from evidence-based training experts in Korea and abroad. It is not a substitute for medical advice.
Weights and sets differ from person to person. The GYMKC app uses the sets you log to calculate the weight and reps for your next set.