These days, more people are using their smartphones and tablets to browse the internet than ever before. In fact, mobile devices account for over 50% of all web traffic worldwide.

If your fitness website isn't designed to be responsive — which means that it will automatically reconfigure itself based on the device being used — you could be missing out on a lot of leads and sales.

Make sure your website looks great on all devices by formatting it with mobile users in mind. That means leaving plenty of space around clickable elements and breaking your content up into short paragraphs and bullet points.

Also, any time you make changes to your website, make it a point to test your website out on a smartphone and tablet in addition to a desktop computer.

Your website's main goal should be to get visitors to take some form of desired action, whether it's signing up for your email list, making a purchase from your online pro shop, signing up for a free membership trial or scheduling a personal training consultation.

However, many fitness businesses don't make it easy for their visitors to know what they should do next. This can result in a lot of lost leads and sales.

To avoid this, make sure your call to action is clear and prominently displayed on every page of your website. And don't be afraid to use strong language that tells visitors what you want them to do, such as, "Sign up now" or "Buy now."

One of the quickest ways to make your fitness website look unprofessional is to use stock images. Not only are they overused and cliché, but they also don't accurately reflect your business or what you have to offer.

Instead, try using high-quality photographs of your own employees or members in action, as well as images of your facility. If you don't have any good images of your own, consider hiring a professional photographer to help you out.

To convert, people need to be able to see themselves working out at your gym or taking a class at your yoga studio. In order to do that, people need to see real pictures of your facility.

Adding videos to your website is a great way to help visitors learn more about you and what you have to offer.

For example, including a video on your homepage that introduces your business and showcases what it's like to be a member is a great way to pique visitor interest. You can also include testimonial videos from happy members or clients, as well as videos of classes or personal training sessions in action.

Including videos on your website can also help you rank higher in search engines, as they are favored by Google and other major search engines.

If your website takes too long to load, visitors will likely leave before they even have a chance to see what you have to offer.

In order for your website to be effective, it needs to load quickly — no more than a few seconds. To ensure this, optimize all of your images. Large, uncompressed images are the number one thing that slows websites down.

Also, make sure your web host can handle the amount of traffic you're likely to get. A good web host will be able to scale as your traffic increases so that your website can load quickly, even during spikes in traffic.

You can also use a content delivery network, or CDN, which is a network of servers that deliver web page content to visitors based on their geographic location.

More often than not, when someone is looking for a local gym, personal trainer or Pilates studio, their search will start on Google or another search engine.

If you want your fitness website to be successful, you need to make sure it's optimized for search engines. That means including relevant keywords throughout your website content, as well as in your page titles and meta descriptions.

It also means making sure your website is mobile-friendly and loads quickly, as both of these factors are taken into consideration by Google when ranking websites.