{
  "$schema": "https://openexercise.org/schema/v0/exercise.json",
  "aliases": [
    {
      "text": "Side Bends on Machine",
      "kind": "common"
    },
    {
      "text": "Machine Lateral Flexion",
      "kind": "common"
    },
    {
      "text": "Selectorized Side Bend",
      "kind": "common"
    }
  ],
  "anatomy": {
    "muscles": [
      {
        "muscle": "external-oblique",
        "role": "prime-mover"
      },
      {
        "muscle": "internal-oblique",
        "role": "prime-mover"
      },
      {
        "muscle": "quadratus-lumborum",
        "role": "prime-mover"
      },
      {
        "muscle": "erector-spinae",
        "role": "synergist"
      },
      {
        "muscle": "rectus-abdominis",
        "role": "synergist"
      }
    ],
    "joints": [
      {
        "joint": "lumbar-spine",
        "actions": [
          "lateral-flexion"
        ]
      },
      {
        "joint": "thoracic-spine",
        "actions": [
          "lateral-flexion"
        ]
      }
    ]
  },
  "classification": {
    "modalities": [
      "hypertrophy",
      "strength"
    ],
    "movement_patterns": [
      "lateral-flexion"
    ],
    "mechanics": "isolation",
    "force": "not-applicable",
    "kinetic_chain": "open",
    "laterality": "unilateral",
    "planes": [
      "frontal"
    ],
    "contraction": [
      "dynamic"
    ],
    "level": "beginner"
  },
  "equipment": {
    "required": [
      [
        "selectorized-machine",
        "plate-loaded-machine"
      ]
    ]
  },
  "external_ids": {
    "wger": "556"
  },
  "id": "oec:machine-side-bend",
  "instructions": {
    "setup": [
      "Adjust the machine seat height so your waist aligns with the machine's axis of rotation.",
      "Sit upright with your back flat against the backrest and secure your lower body with the thigh pads or foot supports.",
      "Position the upper-torso resistance pad against the side of your chest or shoulders, depending on machine design.",
      "Grasp the machine handles lightly to stabilize your upper body without pulling with your arms."
    ],
    "steps": [
      "Initiate the movement by laterally flexing your spine directly to the side against the resistance pad.",
      "Contract your obliques at the peak of lateral flexion for a brief pause.",
      "Slowly reverse the movement under control, returning to an upright neutral spine.",
      "Complete all repetitions for one side before adjusting or turning to train the opposite side."
    ],
    "breathing": "Exhale as you laterally flex against the pad; inhale as you slowly return to the upright starting position.",
    "cues": [
      "Crunch your ribs toward your hip.",
      "Move strictly sideways in a single plane.",
      "Control the return and do not let the weights slam."
    ],
    "common_faults": [
      {
        "fault": "Rotating the torso instead of laterally flexing.",
        "correction": "Keep your chest and hips facing straight ahead; focus strictly on bending side-to-side."
      },
      {
        "fault": "Using the arms to pull or push the machine handles.",
        "correction": "Hold the handles loosely purely for stability; let your trunk musculature do the work."
      },
      {
        "fault": "Using excessive momentum or bouncing the weight stack.",
        "correction": "Perform the movement slowly with a deliberate pause at peak lateral contraction."
      }
    ],
    "safety": {
      "precautions": [
        "Avoid overextending your lateral range of motion beyond comfortable active flexibility."
      ],
      "spotter": "not-needed"
    }
  },
  "measurement": {
    "load": {
      "convention": "weight-stack",
      "implements": 1,
      "kind": "external"
    },
    "profiles": [
      {
        "required": [
          "reps",
          "load"
        ],
        "optional": [
          "rpe"
        ]
      }
    ],
    "records": {
      "volume": true
    },
    "reps_counted": "per-side"
  },
  "name": "Machine Side Bend",
  "previous_ids": [
    "oec:side-bends-on-machine"
  ],
  "provenance": {
    "generated": [
      "/name",
      "/summary",
      "/classification",
      "/anatomy",
      "/equipment",
      "/measurement",
      "/instructions",
      "/setup",
      "/relations"
    ],
    "license": "CC-BY-SA-4.0",
    "review": {
      "status": "machine-generated",
      "model": "gemini-3.8-flash",
      "at": "2026-10-31"
    },
    "sources": [
      {
        "title": "wger: Side Bends on Machine",
        "url": "https://wger.de/en/exercise/556/view-base",
        "license": "CC-BY-SA-3.0",
        "author": "klabautermann"
      }
    ]
  },
  "relations": [
    {
      "type": "variation-of",
      "target": "oec:dumbbell-side-bend"
    },
    {
      "type": "substitute-for",
      "target": "oec:dumbbell-side-bend"
    }
  ],
  "setup": {
    "position": "seated"
  },
  "status": "active",
  "summary": "A machine-based lateral trunk flexion exercise that isolates the obliques and quadratus lumborum."
}