Especially for the older athlete, this form of competition is most beneficial because it involves several completely different disciplines. The swim gives you better upper body and improves the core strength. The cycling is great for a non-weight bearing aerobic work out and finally the run is certainly an aerobic work out. Now you move from one to the other sports, as your training requires. If a minor injury occurs you can keep fit in one of the other sports. The advantage for the older athlete is that you are training the whole body. If you are young you excel at one sport but as you age, if you put too much localized stress on the skeleton and muscles they break down and falter. If you have multiple sports you will have the likelihood of better overall health. In addition Triathlon encourages the older athletes and provides awards up to any age that can complete in the allotted time usually 17 hours for the Ironman.