Consider the following workouts if you are focused on building leg muscle stamina while improving your cardio scores.

“You wouldn’t go right out and say, ‘I’m going to run 10 miles,’” said Cokie Lepinski, a U.S. Masters Swimming coach in Surprise, Arizona. “Same thing with swimming.” Focus on for ...

These victories remind me that with consistency, dedication and smart training, you can continue to perform at a high level—no matter your age.” Related: 'I'm 71 and In the Best Shape of My Life—This ...