Joan Benoit-Samuelson wins the first women's Olympic marathon during the 1984 Olympics at the Los Angeles Memorial Coliseum in Los Angeles, California. (Tony Duffy/Allsport)

Hatha Yoga with Jan Saturday: Begins a new season with classes 5:45-7 p.m. Mondays and Wednesdays, 8:30- 9:45 a.m. Saturdays. $5 minimum donation for charity. St. John's Cathedral, 1350 Washington St., 303-894-0648, hathayogawithjan.com

West Colfax Martial Arts Center

Saturday: "Keep Your Kids Safe: Self-Defense and Emergency Awareness Class," 12:30-2:30 p.m. $10. 9629 W. Colfax Ave., 720-217-8643

Devil's Thumb Ranch

Sunday or Jan. 20: "Skijoring Clinic," learn to ski with your dog, 10 a.m.-noon. $30 with own leash, harness; $45 includes clinic, harness and trail pass; $10 ski rental equipment; Jan. 26: 26th annual Governor's Cup ski competition. Entry fees vary by entry and event, visit Active.com. Reservations required. 2430 County Road 83, Tabernash, devilsthumbranch.com

L-Town Nutrition

Sunday-Feb. 2: "New Year - New You 24Fit Bootcamp Challenge," four-week fitness challenge. A fitness assessment and body analysis is done at the beginning and end of each challenge to determine improvements. Classes are 6 p.m. Mondays and Wednesdays, 9 a.m. Saturdays. Free. Reservations recommended. 1360 W. Littleton Blvd., Littleton, 303-730-2038, e-mail ltownnutrition@gmail.com

Nomadic Yoga Schools

Sunday: "Liberate from Parkinson's with Yoga" programs in Broomfield, Thornton and Longmont. The fee for one session is $10, multi-session discounts available. Details on the website. NomadicYogaSchool.com

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Denver Post Fitness Calendar, 1/1/2013: Hatha yoga, martial arts among offerings