we recommend the MD2 (http://www.rungps.net/wiki/NeopreneBeltMD2DE) belt for running. It is more convenient to carry the device on your hips rather than on your arm and the reception is good too. You can improve your reception by:
- keeping QuickGPS up-to-date
- putting your device on the ground before starting to run and wait until it has low DOP (dilution of precision)
For cycling, the Krusell cases are ideal because you can mount the device on the handle bar.