Large Bouncing Area vs Small
With the focus on lymphatic bouncing, the goal is to bounce just high enough to allow yourself to become airborne for a split second, and then decelerate. With a spring rebounder you can bounce without leaving the mat. With a Bungee rebounder, you have to jump high out of the mat to get enough g force to throw you back up again.
For rebounding doing the lymphatic health bounce, the sweet spot is really where most people jump in. The huge mat in my opinion is not necessary unless doing things like jumping jacks or wide leg squats.
When buying a rebounder that is designed for lymphatic purposes, unless you are super light weight, the larger mats do not allow enough G force with the feet barely coming up above the mat.
The Needak has the largest sweet spot. The Cellerciser has a slightly smaller sweet spot (it utilizes just enough coils unlike the Needak where all the coils are used for the same bounce).
The Lymphaciser, is firm nearly firm the way around. It is somewhat soft in the middle but gets real firm quickly as you stand near closer and closer to the frame.
The Reboundair feels more flat around the edges but sinks in towards the middle of the mat. It is mostly designed for the Health Bounce since they actually invented it.
The Urban rebounder has the smallest bounce area of all, but I not promote it as a lymphatic rebounder so it really isn;t part of my tests and doesn't apply to many of the topics on my site.
The Jumpsport has the smallest. Smaller than all the other spring rebounders on my site. Depending on someone's weight, and adjusting the bungee cords to its lowest yield, it is as close as you can get on a bungee rebounder to doing the Health bounce.
In a nut shell, the Cellerciser has the most even bounce but slightly smaller sweet spot than Needak. If getting an even bounce and doing the Health Bounce, the Cellerciser is my favorite for bouncing on the 28 inch mats and the Jumsport has the best bounce area for the Bungee type rebounders. I strongly urge people to get the smaller Jumpsport instead of their new 44 inch one. The bounce area is big if you want to use it like a trampoline but for doing the health bounce, forget it.
300 pound weight limit on the Needak and Cellerciser????
250 pound weight limit on the bungee?????
400 pound weight limit on the quarter-fold Reboundair
All this makes no sense to me. How can the plastic rebounder have a 400 pound weight limit when the metal one has only a 300 pound. Are they giving the weight limit of the springs or the frame itself? The Reboundair has the same springs on both models and the plastic model has a 400 pound limit, unlike the 300 pound limit on the metal frame.
The real weight limits I know about are not based on the manufactures claims but based on people calling in and saying their springs broke. The first thing I ask is their weight and how they are bouncing.
The way I know the weight limits of each model of rebounder is to see how they bottom out not just when a rebounder is new but how the bounce is on a used rebounder. Pretty much all rebounders handle their "spec rebounder weight that the manufacture claims" when they are brand new. But it if the person is over 200 pounds or doing high jumping and you break a spring the first month, they try to send you a new spring (they often have extra springs, maybe one or two springs with the rebounder extra anyway). But this just sets you up for failure as you have one spring that is new and the others are used. I have found I have to replace all the springs and never just one spring or they all begin to start breaking.
Note: This is not under warranty if you break a spring, they will send you a replacement spring but I have never heard of them sending you 36 new springs. This probably will never happen.
I go by the gram weight of the spring first then want to know if the spring is low or carbon steel. You can have a small high carbon steel but if not enough coils it won't give enough bounce. The Lymphaciser has very short coils but it a high carbon spring. If you see a lot of complaints on a rebounder where the springs are having to be replaced all the time, even if it is a larger or heavier spring, it can still have these problems. The Cellerciser spring, at 106 grams, is not just a heavy spring but it is high carbon. Their springs cost 3 dollars per spring replacement in case you had to order more. Most springs their same size costs 1 dollar per spring. The Cellerciser company doesn't even sell springs on their site. Most other sites have an order form on their site to order a new set of springs. This is my first red flag.
Basically, the only real way to know the real weight limit of a rebounder is to see if the springs jar you within the warranty period after they lose their tension. Another way is if the mat bottoms out to the floor. This is the most common with heavier people.
The Cellerciser has self adjusting springs. With 180 pound person, for example, the belly and 2nd tier supports their weight and the third tier gives the bounce. The maximum tension of the first tier is used up and the 2nd and 3rd tier supports it. This is the reason why you never have to change their springs due to over stretching or springs snapping.
Warning: MAKE SURE ALL SPRINGS EVEN TENSION EVENLY.
With most rebounders it is good to make sure each spring weighs the same opposite each other on the mat, unless it is digitally tempered. If you have a low tensile spring in one area, it will create a soft spot on one part of the mat. When the mat is firmer on one side than the other, it can cause someone to lose balance.
Each spring should ideally have the same pounds of tension. I recommend going to fishing store and buy a cheap scale for measure spring tension. Almost any fishing supply store will have these.
Note: to find out if the spring is high or low carbon, you can tap on the spring with a spoon. If it sounds higher pitch, its most likely a low carbon, aluminum copper blend spring. Notice the color of the ReboundAir spring and notice the Needak or Cellerciser spring. Tap on these 3 springs and each have a different resonance.