This article is from the Hanggliding and Paragliding FAQ, by Joao Geada with numerous contributions by others.
Almost anyone can fly a hangglider. If someone can jog while
balancing a 50 - 70 lb. weight on their shoulders they can learn to
fly. While flying does not require great strength (since the straps
not the pilot's arms - hold the pilot up) long duration flights in
turbulent conditions require a moderate degree of upper body
endurance. This typically develops as the pilot progresses through
training to these longer flights.