1-6 weeks
According to Popular Mechanics who tested several abdominal training machines, they believe that they can reduce back strain versus doing crunches with no machine.
Time is the biggest strain. There are long hours practicing without enough time to rest and recover from the activity because they also need to complete homework and other tasks of daily living.
as long as it takes to recover from your mom
Yes. People with an abdominal aneurysm can cause it to rupture if they strain too hard.
long enough
Small intestine is the longest organ of the abdominal cavity. It is about 20 feet long.
the plane- strain conditions in civil engineering is that state in which the strain in one direction is zero as in long retaining walls, strip foundations, ...etc.
yes, you are putting to much strain on your back and not using your abdominal muscles to lift you
It took then a long time
It should take ten days to recover from appendectomy operation.
It took over ten years to recover after the Shaanxi earthquake
Strain is the change in dimensions per unit original dimensions. For example, if your stretch a 100 cm long wire by 5 cm, Strain = 5/100 = 0.05