Your ability to stand up unaided after sitting on the floor could be an indicator of your mortality.

In total around 159 people died during the period with an average mortality rate of 7.9 percent. However those who were not able to get up without any help were six times more likely to die prematurely.
“It is well known that aerobic fitness is strongly related to survival, but our study also shows that maintaining high levels of body flexibility, muscle strength, power-to-body weight ratio and co-ordination are not only good for performing daily activities, but have a favorable influence on life expectancy”, lead researcher Dr Claudio Gil Araujo said.
Source-Medindia