571. Using Balls 572. Slow Strolling, less than 2.0 mph, Level 573. Walking, 2.8 to 3.2 mph, level, moderate pace, firm surface 574. Walking, Grass Track 575. Boating, Power, Driving 576. Boating, Power, Passenger, Light 577. Canoeing, rowing, 2.0-3.9 mph, light effort 578. Skindiving, fast 579. Surfing, Body or Board, General 580. Skindiving, Moderate 581. Stand-Up Paddle Board 582. Swimming, Backstroke, Recreational 583. Butterfly Swimming, General 584. Swimming, Crawl, Medium Speed, ~50 Yards/Minute, Vigorous Effort 585. Water Aerobics, Water Gymnastics 586. Ice Fishing, Sitting 587. Dog Sledding, Mushing 588. Skiing, cross country, 4.0-4.9 mph, moderate speed and effort, general 589. Skiing, downhill, alpine or snowboarding, moderate effort, general, active time only 590. Sledding, Tobogganing, Bobsledding, Luge 591. Hand Snow Shoveling, Moderate Effort 592. Sitting in Church, Talking or Singing, Attending a Ceremony, Sitting, Active Participation 593. Walking, 3.5 mph, Brisk Speed, Not Carrying Anything 594. Eating at Church 595. Bicycling 14-15.9 mph, racing or recreational, fast, vigorous effort 596. Weight Lifting (Free Weights, Cybex, Nautilus, or Universal), Power Lifting or Body Building: Vigorous Effort. Resistance and Repetitions are Specific to Muscular Endurance or Strength. Record Only the Time Spent Moving Weights. 597. Stationary Rowing, 150 W, Heavy Load 598. Stationary Rowing, 100 W, Medium Load 599. Aerobic, Ballet or Modern Dance 600. Aerobic, Very High Intensity and High Impact