In recent years I have seen that in many Karate tournaments the fighters are using many Taekwondo kicks. I had cousins and close friends who practiced Karate and Karate-do and they only had 2 kicks, front kick and back kick.
The 5 pounds force leg kicks. lol. like if you are going to leg kick, then kick the tar out of the guy so he actually needs to leg check correctly. The reason NEITHER of these guys is in the UFC or ONE is they'd get LAUGHED at. If I kick you in the leg, you'll know it. If I kicked you there twice, I guarantee you'll learn to leg check the third kick, or you'll hit the deck most likely.
In order to have the speed and power to punch and kick correctly, you need to do around 300 pushups per day and around 200 to 300 jump squats per day, AND you need to torque your body into the punch or kick correctly. These guys are throwing "arm punches" like a poorly trained GIRL and their kicks are even worse. I used to train like that EVERY DAY in addition to 1 hour cardio kickboxing and 2 hours traditional karate and jiujitsu EVERY DAY. It's why I can still beat people half my age in a real no-rules fight at 43 years old. Pushups should start with your sternum 1 inch off the ground (resting on the ground is not allowed) and you should go all the way up until both elbows lock out, then all the way back down to 1 inch above ground. Do two sets of 50 per day and 10 sets of 20 per day. It takes that much in addition to heavy bag work to have a punch as strong as a real pro boxer or real professional karate fighter. Jump squats should go all the way down then all the way up as you jump as high as you can off the ground every rep, and you should do 200 to 300 of those per day to have a professional strength snap kick and push/thrust kick.