Adarq.org

More muscle = more potential force

But in my opinion, most great sprinters/jumps calfs are so well developed is because of the force they have to absorb from their sprints and jumps, and thus the calf grows in order to adapt to the stimulus. But the calfs should be trained because a stronger muscle is always a better muscle..

100% true. The reason strong guys have big calves is because of what they're producing at the hip and knee level (glutes, quads etc). So everything that's above the calves produces a lot of power that is being transferred to the ground through the calves, so the calves have no chance but to adapt to that stimulus. In the end, they are so developed like that person is heavier, so they need to grow and stay big.

You know, I was thinking, and maybe the arm swing is what breaks my two-footed jumps - if you happen to lower the arms at the same time as the legs are amortizating the plant, then the force generated by the amortization of the bodyweight + the additional pressure created by the arms "pushing you" into the ground could possibly overload the quads and mess up the jump.

Also, if the arms and upperbody aren't moving more vertically and if the timing is bad, the upperbody will go forward and you will jump forward (will not be able to convert from horizontal movement to vertical movement).

I should film my two-footed jumps from the side and compare them to someone else at the same moment in time and see what I find out.

WTF?

225 kg?

Well the bounds are similar and you can do them with a more vertical emphasis as well if you want to. But the thing with bounds is - they overload that leg A LOT. They make that leg absorb and release energy efficiently and without collapsing. It gets adapted to that stimulus and then a normal single leg jump, with obviously less overload will be an easy thing. So it does a bunch of stuff for you.

And bodyfat and bodyweight plays quite a role in the single leg jump. However, if you look at people like LeBron or Shannon Brown - they're pretty heavy but jump a lot off one leg. The reason for that is their incredible strength. Low bodyfat and a lot of muscle.

It's one thing to compare a 15% bodyfat guy at 180 lbs with a 7% bodyfat guy at 180 lbs. That guy with 7% bodyfat has a lot of muscle to make up to those 180 lbs, and probably squats much more than the 15% bodyfat guy.

In other words, if you're to compare say Shannon Brown to yourself, you have to think how much more stronger he is at say the same weight than you.

Now the problem I see for you in particular is your low height (yes, I know). To be a good one-leg jumper you need good leverage, and at 5'5 that's hard to believe. You're going to need incredible strength to compensate for the lack of leverage.

Mine's sucks so much right now.

After being able to consistantly squat 140 kg (308 lbs) as a close 1RM lift (could probably squat 145 or even 150), right now a 120 kg attempt is felt like a close to 1RM attempt. Basically it feels like what 140 felt like one month ago. ONE FUCKING MONTH AGO!

What about a reverse hyper iso with weight?

Or the leg extension iso? Man I did that today and just felt incredible jump afterwards in the gym. Really awake my VMOs up, it felt TOTALLY different. It felt like you attached another muscle to my legs, a muscle that wasn't there before (talk about the lack of natural VMO recruitment )

You can still jump well with a palmed ball off one leg... if you time your arm swing well the weight of the ball could even help.

I read that deadlifts hit the glutes harder than squats.

Hip thrusts seem to own both for the glutes.

Read that article from the glute guy, eh?