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core stability · intermediate · mat
Seated Trunk Rotation (Russian Twist)
obliquesanterior corerotation control
0.0s / 6.4s
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Obliques
25%
Rectus Abdominis
25%
Trans. Abdominis
25%
Hip Flexors
20%
Erector Spinae
15%
Trans. Abdominis 25% — deep, not shown on the figure
Sets
2–3
Reps
10–16 total (both sides)
Hold
controlled tempo
Rest
45 sec
Quality beats speed — each turn is a full thoracic rotation, not an arm wave. Skip or shorten the lean with a sensitive low back.