Comprising essentially Life Fitness, the fitness segment of Brunswick Corp. recorded a 14.9 percent sales increase to $141.6 million for the second quarter, and its operating profit jumped by 120 percent to $19.1 million for the period. Lower sales increases were recorded in the other segments of the group's business: the marine engine group went up by 7.7 percent, while bowling and billiards inched up by 0.3 percent. Overall, Brunswick's revenues rose by 8.0 percent to $1,096 million, generating operating income of $107.9 million, double the level of a year ago. The gross margin improved to 25.1 percent from 23.9 percent. Net income went up sharply to $69.3 million as compared to $13.7 million in the year-ago period.