If your cat eats dry food, he's more prone to constipation than a cat who eats wet food due to the decreased moisture content. Your vet will do a simple test to determine your cat's hydration level by pinching a fold of skin on his shoulders and pulling up. If it snaps back into place when released, he's well hydrated.
Comparing the Calorie Burn. In terms of calories, a 30 minute treadmill running session at 6mph for an 155lb adult will burn around 350 calories. The same size adult will burn around 260 calories in 30 minutes on a Spin bike at a steady pace. However, a Spinning class is much more intense so you can expect to burn anywhere from 400-600 calories if you push yourself.
A 180-pound person will burn 490 calories per hour at that cycling speed. At 14 to 15.9 mph and a weight of 130 lbs., you burn 590 calories and a 180 lb. rider burns 817 calories per hour. For weight management, how much you should cycle every day depends on how many calories you want to burn each week.