On top of everything, what arrow rest do Olympic archers use?
While that is true to a certain degree there are still a few Olympic-level bargains out there, and one of them is the $2.50 plastic Hoyt Super Rest. A $2.50 plastic Hoyt Super Rest. An arrow rest is a critical component on an Olympic-style recurve bow which lightly holds the arrow away from the bow.
Next, how do I choose the right arrow?
On the other hand, what is the disadvantage of an arrow that is too long for the bow?
In order to be tuned for the bow, the longer arrow must have a stiffer shaft, which is inherently heavier than a less stiff shaft of the same design. Then being longer than is needed also makes it heavier. Both of these criteria make the arrow slower and reduce its cast.
Do you need a plunger for recurve?
Nearly every competitive recurve archer will need a plunger after completing introductory lessons. The right plunger increases consistency and can last years, maybe even decades. It helps make your bow more forgiving, but don't ask it to fix every shooting problem.
In short: Recurve bows do not need an arrow rest. In fact, it is perfectly okay to shoot directly off the shelf. However, an arrow rest is recommended because it protects your bow and arrow from damage.