Muscle fatigue is a reduction in the force or power that the muscle can produce and it commonly happens due to a lack of exercise leading to slow oxygenation.

A fixed position (e.g. sitting upright) requires the muscles to hold the trunk, neck, and shoulders in a fixed place reducing the blood supply to the working muscles and causing fatigue.

Sitting for an extended period also leads to the weakening of the large leg and gluteal muscles, increasing your chances of injury when you get to exercise.

The insufficient activity also leads to muscle mass loss which can result in joint inflammation and osteoarthritis.

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