To get a good bass, you need a good seal (or a good polar bear)...LOL...
There are nowadyas plenty of IEM models that will work for workout, Klipsch recently released like 5 models, Sleek released another, very good BTW, and of course the classics we all know, UE, Westone Shure, Etys, etc...But those tend to be expensive, and you will hate to ruin them.
I agree with Alan, Koss for a cheap alternative, is unbeatable, also they carry lifetime warranty, you break them you send them back to them with $6.00 for the shipping back, and get a new pair...simply as that...I like the Portapros a lot...have two pairs around, along with other IEM and some good full size headphones...
