January 31, 1983

First there were the fitness centers, the aerobic dance classes and racquet ball. Then came the training courses in accounting and financial management, followed by classes in ''country kinds of activities, like hiking.'' They are among many new lunch-hour diversions offered by corporations in Westchester and Fairfield Counties to try to compensate for the isolation some employees feel after leaving New York City for a corporate home in the suburbs. Some companies have even begun paying college professors to give lunch-hour lectures on such weighty topics as psychology in the 80's, contemporary American religion and the emergence of the individual during the Renaissance. And as more and more corporations move to the suburbs, taking their employees with them, they are spawning a small renaissance of their own.

The Washington Redskins employed an awesome combination - muscle and finesse - to win Super Bowl XVII today from the most sophisticated defensive team in football. They beat the Miami Dolphins, 27-17, but the score could not reveal the ways in which the Redskins prevailed. It could not show, for example, how the Redskins' motion nullified the Dolphins' A.J. Duhe, the mobile linebacker who charges from different parts of the field. Nor could the score show how the left side of the Redksins' offensive line charged and punished the right side of the Miami defense, especially when John Riggins was called on to run.

Lawmakers in both major political parties said today that they expected Congress to make major changes in President Reagan's budget to reduce the large deficits that loom for the rest of this decade. Specifically, many members of Congress are advocating much smaller increases in the military budget and cancellation of some expensive weapons systems like the MX missile. There is also a growing consensus that Congress must move more boldly than the President has suggested in raising taxes. ''Who wants to put his name on a $200 billion deficit?'' asked Senator Ernest F. Hollings of South Carolina, a senior Democrat on the Budget Committee. ''I don't see how anybody, politically, could join up with the President.''

A tumultuous 17-hour Liberal Party meeting ended near dawn yesterday with Raymond B. Harding, the longtime vice chairman and party leader, in control of the party and very likely its patronage recommendations. Governor Cuomo, supported early in his campaign by the Liberals, had held up appointing members of the party until it resolved its differences. But the meeting exposed a bitter division that Mr. Harding said would require a special effort to heal.

Artillery duels between Christian and Druse militiamen spread to Beirut today. In another incident, an Israeli soldier was killed while patrolling the outskirts of the capital. According to an Israeli military spokesman in East Beirut, four or five gunmen opened fire with rocket-propelled grenades on a patrol that consisted of two armored personnel carriers and then escaped into West Beirut behind an Italian contingent of the international peacekeeping force. In addition to the Israeli soldier who was killed, three others were wounded, the Israeli spokesman said. (Secretary of State George P. Shultz said that after a weeklong review of the Middle East situation, the Reagan Administration had no formula to speed a breakthrough in the talks on withdrawing foreign troops in Lebanon. In a news conference en route to Tokyo for the start of a 12-day Asian trip, Mr. Shultz also ruled out applying pressure on Israel to make concessions. Page A6.)