Photo: 7-mile run, Marion, Iowa, 7 a.m., 23 degrees

Weekly activity log:

Swim: 2,600 (ytd 165,200 yds.)

Bike: 71 (ytd 3,639 mi.)

Run: 20 miles (ytd 1,048 mi.)

And so it begins.

Photo: 4-mile run, Scottsdale, Arizona, 5 a.m., 60 degrees

Weekly activity log:

Swim: 2,200 (ytd 162,600 yds.)

Bike: 38 (ytd 3,568 mi.)

Run: 21 miles (ytd 1,028 mi.)

The weekly commute.

Photo: 4-mile Arizona run, 30-mile fixie ride in Iowa, 55 and 35 degrees

Weekly activity log:

Swim: 0 (ytd 160,400 yds.)

Bike: 63 (ytd 3,530 mi.)

Run: 19 miles (ytd 1,007 mi.)

Photo: 30-mile fixie ride, 2-mile run, 38 degrees, 8:00 a.m., Linn County, Iowa

Weekly activity log:

Swim: 3,600 (ytd 160,400 yds.)

Bike: 71 (ytd 3,467 mi.)

Run: 22 miles (ytd 988 mi.)