@wesley_williams_ has some cool footage. the reason why i'm impressed is he clearly got his back involved for this jump which is great. but he doesn't fully extend his hip because when he takes off his glute isn't underneath him so some glute activation is lost. despite this both the height and distance is pretty impressive which is very cool.
@kingryang is an animal. as he pivots his hips he's using his obliques, gluteus, and lats with each punch. i wish we could see his legs so i can describe which muscles are being used as he pivots to each punch. but the speed on this young man is pretty impressive.
Check out @badurgovislam and this impressive video. his flexors in his hands and forearms are exceptionally strong. obviously his lat strength is up to the standard. he's also chosen to use a very proprioceptive rich environment. all and all very cool video.
Check out this ridiculous hamstring development! this is @ifbbdandecker wow. so you athletes out there, if you want to sprint faster and be more explosives you have to work the posterior portion of your body. so basically, hamstrings are key.