Running stairs is one of the best types of training you can have. I incorporate stair training for both myself and my clients. It burns a great number of calories; it’s great for lower body muscular endurance and conditioning and keeps the HR in higher BPM than any other aerobic training out there. I combine stairs with an unlimited number of body weight exercises to get the most out of this workout. If time is an issue then running, climbing or combining stairs with other exercises (burpees, pushups, core exercises, etc.) it’s the most efficient way to reach some great results. I use a variety of routines, intensity and duration when I train my clients, depending on their goals, fitness level and training regimen. I have developed a program that combines stairs with swimming which I use for many of my tactical clients (law enforcement and military). For my more advanced clients, I also use some other equipment while they do stairs such as battling ropes, weighted plates, free weight, kettlebells and sandbags.
I hope this helps.