Obliques

The internal and external oblique muscles on the sides of the torso. They resist rotation and lateral flexion — stabilizing the trunk during one-shoulder Sandbag Lunges, preventing lateral sway in Farmers Carry, and controlling rotation while running.
Definition
The abdominal obliques are the paired external and internal oblique muscles of the anterolateral abdominal wall. Their fibers run in different directions and contribute with other trunk muscles to abdominal-wall function and trunk movement.
NCBI MeSH: abdominal oblique muscles
Training limits
No exercise completely isolates the obliques, and training them does not selectively remove fat from the waist. Exercise selection and dose depend on the task and tolerance. Oblique training does not guarantee a smaller waist, back safety, injury prevention or HYROX® performance.
NCBI MeSH: abdominal oblique muscles
FAQ
Is there one correct load or dose?
No. Select it from the goal, equipment, experience and response.
NCBI MeSH: abdominal oblique muscles
Does it guarantee HYROX® performance?
No. Training relevance does not establish individual race transfer.
NCBI MeSH: abdominal oblique muscles
What if it hurts?
Stop for sharp, persistent or worsening pain and seek qualified assessment.
NCBI MeSH: abdominal oblique muscles
Yes. Weak obliques allow excessive trunk rotation and lateral sway during running, wasting energy and reducing stride efficiency. This becomes more pronounced under fatigue in the later race segments. Repz run split analysis can reveal progressive pace decline that may indicate core fatigue.
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