From a Wall Street Journal online article:
Tuesday, Friday and Sunday, he is out before dawn for a 1.5- to two-hour run with Abby and Finn on one of the many trails accessible from Tucson along the Catalina Highway. The dogs are disciplined enough to run off-leash in a pack with him. The farthest he has taken Abby is a 13-mile, three-hour run. “She came home quite tired, as did I,” he says. When training for a marathon or longer distances, he adds a solo run on Wednesdays. He’ll run up to 23 miles on a network of paths in Tucson called the Loop.
Mr. McLean has had Achilles tendon problems as the result of tight calf muscles, and says he stretches for 15 minutes every night and before his morning run.
Like many marathoners, John McLean trains with running buddies. But if he isn’t keeping pace, he gets barked out. Mr. McLean is a dog-lover who logs miles with four-legged friends, both his own and rescues.
For years Mr. McLean, 63, ran solo. He and his wife, Barbara McLean, live in Arizona. They worked in the aerospace industry and travel made it tough to look after a dog. The day after Mr. McLean retired in 2014, he came home with Abby, a 10-week-old Chocolate Labrador.
To read more: https://www.wsj.com/articles/this-marathoner-is-a-dogs-best-friend-11575201674
In the spring and summer, he trained two to four hours a day, six days a week, running daily and carrying 60 pounds of water up a 4,000-foot peak near his home in Seattle twice a week. “All the research has shown that 80 percent of training for alpine ascents needs to be long duration and low intensity, to build a huge foundation of endurance,” Swenson says. “There are no shortcuts to this. There’s no thirty-minute-a-day gym workout. You have to have the discipline to put the time in.” 
Now 63, Mr. Peterson has progressed from bike paths to rugged mountain trails and is known for his caped helmet emblazoned with his nickname, UniGeezer. Based on his GPS and bike computer, he estimates he’s logged nearly 30,000 miles, or 24 million pedal revolutions, since he started.
Mr. Aiona paddles with his club on Tuesday and Thursday nights and Saturday mornings for 90 minutes to two hours.They alternate between sprints and endurance paddles of up to eight miles in a six-man outrigger canoe. They also work on paddle technique and do huli drills. “Huli is Hawaiian for turn over,” he explains. “If you flip your canoe there is a very precise process for getting everyone safely and efficiently back in. We call out positions to make sure no one is underneath.
Gravel riding is more jarring than road riding so strength and mobility really come into play. “Your upper body takes much more of a beating,” Mr. Wilwerding says. “Especially when you’re riding bumpy terrain for eight hours.” With the help of a coach, he has trained to participate in five century rides—three road, two gravel—this summer. His next ride, the SBT GRVL, takes place Aug. 18 and covers 141 miles and about 9,000 feet of climbing in Steamboat Springs, Colo. “I’m in the best shape of my life outside of my collegiate swimming career,” he says. 
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