From a parent's perspective I'd be extremely proud of the physical accomplishments and the results of the dedicated hard work of the two sisters.
I notice they are black belts and that the photos are dated about 5 1/2 years ago per the link in Mike's post.
http://www.photosport.com/martialarts/martialarts05.htm
I don't know where the women might be in their training paths right now. I do hope they are training and that they have progressed particularly in the area of personal growth to the poiint where they are self-evaluating and self-correcting.
There's at least 100 photos there of the women engaged in sparring tag drills which are excellent aerobically, and great for timing, distance and focus purposes. The girls are essentially kicking each others blocks in the sequence and not fighting. These are drill photos and provide a greater context of the one extracted photo which is in group 37-54, middle row on the end.
Glasheen Sensei is known for choosing his words carefully. He identifies several areas of achievement demonstrated by the women but does not once mention "karate."
Again, speaking parentally, I know there is more for these girls should they choose to continue on in their training.
Some heavy bag work and target pad drills while moving would add the important elements of impact training and conditioning to their feet and shins.
Accha in the photo has her kicking leg at about 11:00 o'clock. She might want to seek a fuller range of motion and in a static position reach 180 deg. 12:00 up position which each leg. Then under stress and duress she could kick hard, kick through a simple shuto block, and kick a target at her head level.
Flexibility is an importanent component of speed and the greater her skill the greater her mobility and movements will become. Can she drop into 180 deg side splits? Working on floor level splits will assist her high kicking skills and in her movements in grappling circumstances. She can learn power drop takedowns in which she switches levels in low horse stances so that she can actually drop on or beside an opponent that you bring down and still have her back erect and deliver punishing punches and then move on. This way you are not stooping or bening over, viz. Seiyu Shinjo's famous photo.
My son has been attendng seminars and regional workouts in the mid-Atlantic states for the last ten years. People always want to know how he achieves his flexibility. He's about 177 deg. in his full side splits. He's set a 6 month goal to finally reach 180 deg. with plyometrics and fast twitch muscle resistance drills. He's a Yondon now and the exercises I've mentioned above are what he does.
Fortunately, he's got the self-correcting self-directing circuit boards in his personal wiring and a couple of extra motivational plug-ins to boot.
Good luck girls. You're the future of our art.
There is much to make of every moment.