I have spent countless hours at work sat down in front of a computer.  Any profession that involves prolonged periods of sitting down...

Yoga sutra 1.30 vyādhi-styāna-saṁśaya pramāda-ālasya-avirati bhrānti-darśana-alabdha-bhūmikatva-anavasthitatvāni citta-vikṣepāḥ te...