I wanted to start a weight loss competition this summer in my family, but I wanted it to be fair. For example its probably easier for my 260 pound brother to lose a pound than my 160 pound mom.
So whats is the best way to compare? Should it just be percentage of mass? [...]

I am an overweight teen, a 190 pound 15 year old, and don’t want to go on a traditional diet, but would like to make some healthy lifestyle choices to help with weight loss. Me and my best friend have decided to go to a local gym 4 times a week for 2 hours [...]