Causes. In ALS, the nerve cells that control the movement of your muscles gradually die, so your muscles progressively weaken and begin to waste away. ALS is inherited in 5 to 10 percent of cases. The other cases appear to occur randomly.
1 The smaller studio uprights usually weigh between 400 and 600 pounds. 2  The monstrous full vertical or large upright piano can weigh as much as half a ton.  A studio piano's center of gravity is also lower than a large upright's, as it is about 4 feet (1.2 m) tall as opposed to a large upright's roughly 5-foot height.
Best Answer: An alto weighs about 3-4 pounds. A tenor weighs about 8. A bari weighs close to 15. The alto and tenor case don't add much more weight, usually a bari case will though. (What the case is made out of will also affect it) The alto is not a heavy instrument at all! I started at 11 and I was very small.