Hamstring & Calf mobility is key for performing many asanas (poses).
While the upper body tends to be more flexible, the lower body for most people is stronger but more stiff. To bring balance stretching the back of the legs is a good idea, I think.
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Hamstring & Calf mobility | Hamstring stretches | Calf stretches | Hamstring flexibility | Calf flexibility | Best yoga for men | Yoga at home for men | Self practice yoga | Universal yoga