When you first create your Gym Insight account you are given the option to choose a username. If you don’t choose a username at signup, your username will default to the email address you used when you registered. You can change your username whenever you like which is certainly handy if you get tired of typing in your full email address or if your email address changes; here’s how.
Start by clicking on the user button and then selecting Your settings.
Once you’re on the user profile screen, click on the new username button.
Next, you will see a simple form where you can enter a new username. If the username that you enter is already in use by someone else, you can try again until you find one that you like. Go ahead and enter a new username and then click the change username button. That’s all there is to it! You can confirm that your username has been changed back on the user profile screen.
Here's a step-by-step video showing the process: