Let’s take a minute to talk about sport versus exercise. Because yes, there is a difference. And ignoring this difference can cost you dearly - both in terms of injury and performance.
The main problem is that people use sport as exercise, and spend no time training their bodies. That is, they ignore the fact that you are supposed to train and exercise so that you can do your sport successfully and safely, and just jump straight to the sport-part.
The best example of this is running. Granted, running is an effective calorie burner, a very cheap way to get in shape, and is easy to do wherever and whenever. People, therefore, tend to rely only on running for their workouts, forgetting that running is extremely demanding on the body. The high impact and repetitive motion at a quick pace can easily lead to overuse injuries.
Running is a sport, and doing it well and safely actually requires training for it. A big pet peeve of mine is runners that say they don’t need leg day because they run. This But that is reality flipped on its head. The fact that you run is just more reason to do leg day! Running is not a leg workout. Running is cardio. If you want to run far, fast, and injury-free you need to cross-train.
Professional runners know this. Ask any one of them whether running is the only thing they do to prepare for races and I can promise you that they will promptly inform you that weight training to promote proper muscular balance and movement pattern drills also play a big part.
Running - and, for that matter, biking, capoeira, salsa dancing - is a sport. If you want to continue doing it, and do it well, you need to respect the sport.
As always, the trainers at ADR are happy to work with you (or someone you know who much need it) on sport-specific training techniques. Send an email to email@example.com to get started.