If you're not as agile as your friends—perhaps due to arthritis or other similar conditions—you may feel left out when they go on outdoor adventures like mountain bike trips and kayaking expeditions. But while you may not be able to stay side-by-side with your more agile friends as they row against the rapids or bike down bumpy trails, there are still ways for you to participate! Here are a few ideas to help you you back out there, in spite of your lack of agility.

Purchase a motorized mountain bike.

Mountain biking can get pretty treacherous, but as long as you can pedal effectively for a few minutes at a time, there's no reason to stay behind while your friends hit the trails. A few companies have begun selling motorized mountain bikes. These are exactly what they sound like: mountain bikes with small motors that can power them along. You can turn the motor on and sit still as the bike powers itself along the trail, or you can turn the motor off and pedal like you would on a normal bike.

When you buy a motorized mountain bike, you can pedal for as long as you feel comfortable, and then take a break without having to fall behind your friends. Just let the motor do the work! Most models carry enough gas to propel you about 50 miles, which is longer than the average mountain bike trek.

If you decide to invest in a motorized mountain bike, be sure to spend some time practicing on flat surfaces before you hit the rugged trails. Balancing can take some getting used to and is not quite like balancing on a normal mountain bike. Also, since these bikes have mechanical gear, you will want to haul them inside a truck or trailer rather than on an exterior-mounted bike rack. This protects the motor from rain and the elements. So, factor a trailer or new vehicle into your costs, if needed.

Purchase a double kayak.

Even though most people opt for individual kayaks, there are models made for two people. Consider buying a tandem kayak if you think you can talk one of your friends into pairing up with you. They might be swayed if you pay for the kayak and save them the cost! Sit in the front, where you can take a break from paddling if needed, and let your stronger, more agile friend take up the rear where the paddling is harder and more necessary.

You'll have no trouble keeping up with the single riders in your group. Plus, tandem kayaks are more stable than singles, so you less of a chance of capsizing. Still, make sure you wear your life vest—especially if you feel your mobility issues may make it harder for you to swim or pull yourself out of the water.

Keep in mind that tandem kayaks are heavier than single kayaks. Most weigh at least 75 pounds, so you may have to rely on your friends to get the kayak on and off of your vehicle. Also, note that it may take some time for you and your paddling partner to master rowing in sync with each other. Plan on practicing on a quiet lake or pond before you hit any treacherous rivers. 

Whether you enjoy kayaking, mountain biking, or both, there's no reason to stay behind because your friends are more agile than you are. With a motorized bike or a tandem kayak, you can keep up with the others and have just as good of a time. Learn more by contacting local recreation and sports shops.