It is a tendon running from hip to knee. It already has the strength of steel. You need to improve the functioning of the muscles that aren't doing the job currently. In my case its mainly working on tensor facia latae and glutes. For general advice have a look through Health & Injury forum - '000s of posts on IT Band related injury/rehab. Take care - not all causes are the same for everyone, and not all rehab routines are appropriate