"We’ll start by sending astronauts to an asteroid for the first time in history"
(President Barack Obama on Space Exploration in the 21st Century".)
With a very low gravity, an asteroid is not really friendly to the walking visitor. Any movement may send the walker back to orbit.
Considering the schedule -- NASA could launch a mission as soon as 2025, -- a solution will need to be validated by less than 10 years.
What kind of solution is foreseen by NASA to keep astronauts on the asteroid ground when collecting asteroid samples or performing other useful activities?
Related: How will they mine asteroids?
Not a duplicate of Could a Human reach escape velocity by jumping from the surface of Ceres (a dwarf planet)?, I'm not asking if astronauts can reach escape velocity (which is possible), but what solutions are currently foreseen to perform activities in an efficient way for the missions planned by NASA "as soon as 2025".