Wlaking and running will also provide appropriate leg strengthening for scuba. Swimming with fins will do the same AND improve your scuba movement. A long., low [profile line with leg movement that has a modest knee bend will help stream;line for easier movement thought he water, especially when dealing with current. As you involve yourself in exercise to strengthen leg muscles remeber to also have a good stretching routine before and after exercise, and that includes before diving.
DivemasterDennis
DivemasterDennis