agreen, what you're describing isn't specific to the calfs as much as a combination of flex issues in the lower half of the body. Obviously stretching those tight calfs is a great idea since more range of motion reduces the possibility of an injury. That doesn't mean they operate in isolation though. The Plantar facia, hamstrings and glutes are on on that posterior side of the legs as well and they are all connected and work together. So if one area is tight the rest can usually compensate a bit. Check with your DR but here's a easy stretch that will increase your RoM in that area. Try standing on a stair with your heels hanging over the edge of the stair. Slowly allow your heels to drop and your calfs to stretch. Don't over do it though, it takes time to make any lasting changes.
A second issue you are experiencing is very common one, especially when you follow the advice to always stay forward and always drive your shins into the tongues of the boots. Stop working so hard! Kneel against the tongues and let the boots support your weight. Obviously as you do this your stance will be a bit taller and if you think about it it's a bit more natural since is your skeleton that should be doing most of the weight bearing. As the legs flex, the muscles progressively take over the weight bearing role (think of them carrying more tension) and as they do this you are less able to use them to make supple absorbing moves. Think of the boots as supporting your weight, not an impediment to moving your knees forward and dorisflexing the ankle.
The third issue is related to how the leg flexes and how the femur (thigh bone) affects where the pelvis goes when we flex the knees and hips. In short a horizontal femur means the hips will be aft of the ankles. Just like they are when you sit in a chair. Compensating for this we break at the waist and allow our shoulders to move forward, or we move the arms forward. Not a problem if we end up here occasionally but if you are trying to stay in this squatted stance all the time, then you will continue to have the "can't get forward" problems.
Hope it helps...
Edited by justanotherskipro - 2/8/12 at 11:57am