Use the words given in capitals at the end of each line to form a word that fits in each space in the same line. There

 NOT FIT, BUT SMART

In my family we don\'t worry about fitness. I suppose you could say I\'m rather unhealthy. I only eat junk food and I never do any exercise. I\'m not very energetic and I’m completely useless at sports. My two sisters are not similar to me when it comes to leading active lives. Neither of them has played any kind of sport since childhood. What they lack in sporting ability, they make up for in intelligence. They are two of the cleverest people I know. One of them works as a research scientist and the other designs electronic equipment like calculators and mobile phones. They have both done extremely well in what are very competitive professions.