Forward bends increase the gastric fire and help healthy digestion of food. This prevents fluctuations of sugar levels in a diabetic. Hypoglycaemic reactions are suppressed. Burning up of excess sugar is promoted by the stimulation of gastric fire. In renal disease, the increased systolic pressure in the renal artery and the protein load during aerobic exercises might further damage the kidney.
Yoga makes arterial flow easier without an increase in systolic pressure.
In yoga there are asanas to shut off blood flow or promote flow without velocity if necessary. Intra-renal massage prevents deposits in the microcellular areas that damage renal tissues. Back bends are valuable tools against progression of renal lesions. They squeeze the kidneys and prevent stagnation of circulation and deposition of material that blocks blood flow to the cells. Hence, organ atrophy is prevented.