How does UCS come to pass?
Upper cross syndrome can have a variety of probable causes; however, the two most common are extended periods of bad posture and a lifestyle that is characterised by inactivity. This imbalance can be caused by sitting for long periods of time, looking down, and staring at displays for long periods of time. Athletes who overdevelop one group of muscles while neglecting to work the opposite groups of muscles can also develop this condition. The pain and imbalance are not caused by these exercises; rather, they are typically caused by failing to take pauses and failing to maintain optimal contracting postures.
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Upper cross syndrome - Symptoms, Causes & Treatment- Myo Fitness
Today it hurts tomorrow it works
https://myofitness.com.au/upper-cross-syndrome-ucs/