A great sport where you absolutely must build strength while retaining flexibility and endurance. All-round fitness excellence, then. Maybe just a bit of showing off, first:   Now to work:

The perfect sport for strength, flexibility, skill and endurance. Much to admire here.  

The finest sport for building strength while keeping flexible, and for building endurance through regular training and development. Accessible at an early age (like 4-5!), peaking around 20 and (with regular training) keeping some skills going as long as you like... Gymnasts of all ages today: successes (and some fails), some basic training... admire, enjoy and be determined to raise your own fitness level!