Nairobi, Oct. 31 -- What would make you carry a heavy sack up a hill, drag a tyre along a dusty road or repeat a series of jumps when your legs are already burning? For fitness enthusiasts, the answer lies in a different kind of workout, one that swaps gym machines for tyres and hills to test strength, stamina and determination.

At 7.30 am, Lois Waini has a sack balanced on her shoulders as she makes her way up a slope. Her feet strike the uneven ground while the weight tests her balance and endurance. Nearby, Daniel Kamau prepares for his turn as Julius Wambugu, the trainer, moves between participants, corrects their form, and urges them to keep going.

Published by HT Digital Content Services with permission from Business Daily....