The city is offering its second annual Fitness Challenge this spring. The six-week program will feature free fitness events nearly every day around the city at organizations and businesses. Participants can win prizes based on loss of weight, inches, and body fat. Last year’s challenge attracted 300 participants, and organizers hope to exceed that number this year. The challenge begins with weigh-ins on April 26, 27, and 28, with events beginning April 29. To preregister, e-mail firstname.lastname@example.org or call 339-226-1283. The city, Revere on the Move, and Millions of Muscles, a local fitness business, are partnering with area fitness groups to organize the program. Revere on the Move is a program to promote healthy eating and fitness in the city.