NAIROBI, March 11 (Xinhua) -- "One and two, one and two," the instructor shouted to a group of eight people at a fitness center in Kitengela, a suburb about 32 km south of Nairobi, the capital of Kenya. His instructions were in rhythm with the fast-paced music playing in the background to motivate the trainees as they engaged in various exercises.
After about 10 minutes, the instructor switched from jumping jacks to push-ups, striving to ensure the group engaged in as many drills as possible to keep fit.
