You should lift lighter weight with far more repetitions I would think.
The correct answer is "trying the new exercise program with a friend".
Scientific reports show that starting a new exercise regime with a friend can be beneficial, rewarding and more efficient. Exercising along with a friend not only provides solid emotional support but also increases one's motivation to try and work harder. It also increases the probability of sticking to the new program and not quitting and eventually succeeding in your goal.
