fun run

Shorts brings compression to your working muscles during your runs. However, compression often turns into contention if shorts are not suitable for your size; Also, the ideal is always to try this kind of product before buying it. Recall that this type of product shall promote good circulation and preserve your muscle fibers and not limited to a "tightening" of your muscles with no interest.
In conclusion: a pair of shorts that can be adapted to your muscles or not according to your size but you better bring good regulation of blood flow in the muscles and at least one retaining sensation that serves it, not great thing.
Tip: try before you buy.