Box jacks are a dynamic plyometric drill for building strength, speed and power. Learn how to do box jacks with a medicine ball in this free plyometrics training video lesson.
Expert: Kirk Vickers
Bio: Kirk Vickers is the owner of TRIAD Performance Gym and Training Center. He was twice voted as one of Americas Top 100 Trainers by Mens Journal Magazine.
Filmmaker: Travis Waack
@DRAGONpiccoloBALLZ yeah! where else?
DRAGONpiccoloBALLZ 2 months ago
@DarkGuitarKid at the videos ?!
DRAGONpiccoloBALLZ 8 months ago
where can you buy these frickin boxes??
tiptippinonmydick 1 year ago
this is a good lower body workout
kingofthemile87 1 year ago
awesome stuff
codfanatic4 1 year ago
And when did you ever learn that someone should exercixe that much that he gets muscle sources? So if I go to the gym thrice a week - I do - I always have to train that hard (not possible for all muscles, because you get used to the training) that I get muscle sours?
And only because of muscle sours your burn calories for days after exercise? Haver never heard that.
WasGibtsLeute 1 year ago
I am not sure means I am not sure. So I am not sure or rather I doubt a bit that calorie burning initiated by exercise lasts for days.
I underwent a course for PT to learn a bit more but I didn't take over 11 six month courses.
I know that the muscles sour because of microscopically little damages. I feel it relatively often. But to repair and increase fibres you need protein much more than carbs. They are both calories at last, I know but you don't burn that much.
WasGibtsLeute 1 year ago
what u mean your not sure... ive taken over 11 six month courses dealing with exercise science, anatomy & physiology etc etc,.. point being when you utilize added resistance to train your muscle fibers are actually slightly damaged... this is why the muscles u trained are sore for 24-72 hours after... this means your body must re-build these fibers, thus calories are burned in the process...
dzydave0021 1 year ago
I am not sure if the calorie burning really lasts for days after exercising. Why should it? And why just resistence training have such a benefit and not fast walking also? Maybe just a myth?
WasGibtsLeute 2 years ago
and the added benefit of training the type 2 fast twitch muscle fibers which have a much higher growth potential and calorie burning potential..! and with that intense training you get incresed production of potent fat burning hormones i.e. GH, Test, and IGF-1... well said
dzydave0021 2 years ago