Last Wednesday in class a woman injured the knee of her support leg while executing a round house kick in a partner held pad drill.
The Instructor introduced the drills not for the purpose of conditioning but for teaching proper technique (pivoting on the support leg), focus and targeting.
Any time impact and resistance is involved in completing a technique, conditioning or lack of conditioning becomes an issue.
There are some karateka who would regard the back and forth kicking in thigh conditioning as brutal and painful. In my opinion, these students forget the benefit of this conditioning exercise to the kicker. Over time, the kicker is stregthening the tendons and ligaments in his/her kicking leg as well as "conditioning" the partner's thigh.
Had the student more impact kicking experience, she possibly would not have injured herself. One has to practice on one's own doing bag work and/or focus master work (or the old-fashioned makiwara) to thoroughly test and strengthen the arms and legs for punching and kicking.
Without addressing the issue of conditioning, one may unfortunately get injured.
One needs to have a balance in training, performing kicking without and with resistance. Both are necessary for the proper development of form and power.
We found out this week that she will be out at least eight months due to a torn ACL. And that's not at all good news.