| muscle: | Lower Back, Rectus Abdominis, Glutes | 
|---|---|
| auxiliary muscles: | Trapezius, Deltoids, Obliques, Quadriceps, Hamstrings | 
| required: | Nothing | 
| optional: | Fitness Mat | 
| level: | Hard | 
| type: | Strength | 
Variations Of Straight Arm Plank Around The World
| muscle: | Deltoids, Rectus Abdominis | 
|---|---|
| auxiliary muscles: | Obliques, Hamstrings, Glutes, Serratus Anterior, Latissimus Dorsi, Trapezius, Lower Back | 
| required: | Exercise Ball | 
| level: | Normal | 
| type: | Strength | 
| muscle: | Rectus Abdominis | 
|---|---|
| auxiliary muscles: | Lower Back, Obliques, Quadriceps | 
| required: | Exercise Ball | 
| level: | Hard | 
| type: | Strength | 



















