
How long should you be able to do a plank? According to fitness experts, it depends on your age.
Planking is a strength-building exercise that requires you to lie flat, balancing on your forearms and toes — like a plank of wood.

How long should you be able to do a plank? According to fitness experts, it depends on your age.
Planking is a strength-building exercise that requires you to lie flat, balancing on your forearms and toes — like a plank of wood.