Sedentary Lifestyle or Physical Inactivity means a medical neologism used to denote a type of lifestyle most commonly found in modern (particularly Western World) cultures which is characterized by sitting or remaining inactive for most of the day (for example, in an office), with less than two hours of uninterrupted moderate exercise each week - generally bringing on Obesity, particularly amongst the middle aged and elderly. Obesity often results in high blood pressure, Type 2 Diabetes, heart disease, stroke, kidney disease, Arthritis and some cancers, as well as social marginalisation.

A Sedentary Lifestyle generally involves Sedentary Leisure Activities.

As explained in Section 4.(b) for all but the last scintilla of humans' occupation on terra firma, over 99% of humans burned many more kilojoules than current humans' present Lifestyle Behaviour. If you didn't hunt or till fields, you starved to death. Most hunting was done by running down animals that were faster over short distances but didn't possess the endurance of man "the hunter". Or humans farmed to grow crops which was highly labour intensive. Consequently, humans were exceedingly fit or they died, and humans needed to have the confidence and experience to extend their boundaries.

Seemingly Homo sapiens -

i) first appeared on the Savannah Plains, East Africa about 125,000 years ago when the previously dense and plentiful jungles could no longer provide sufficient food due to temperature rises;

ii) migrated from East Africa 65,000 circa years ago, replacing populations of Homo erectus in Asia and Homo neanderthalensis in Europe.

Until very recently, unless humans hunted or farmed/gathered, they died. Both required lots of regular exercise. Some hunting was done by throwing a spear, firing an arrow or using a net. However, a lot of hunting was performed by Homo sapiens running down faster prey. Whilst Homo sapiens was generally slower runners than the prey the faster sought, Homo sapiens often out-endured their prey to eventually catch and kill it.

Hence, current Lifestyle Behaviour characterised by Sedentary Lifestyle or Physical Inactivity -

(a) is alien to over 99% of the 110 billion Homo sapiens born thus far on terra firma in the last 150,000 years that Homo sapiens has occupied Earth, although many of the present incumbents may not think so; and

(b) has created inter alia Fifteen Problems with Adverse Costs >$155b annually in Australia as quantified at Negligent Lifestyle Annual Costs.