Silvio Sabba bent his knees 14 times in one minute while balancing on two balance boards.
Alicia Weber performed 1,140 consecutive knee tucks.
Silvio Sabba bent his knees 64 times in one minute while balancing on a balance board.
Pavol Durdik hit a balloon with his head for three minutes, 27.00 seconds while kneeling.
Petr J. performed 18 "back flip-knees-back" somersaults on a trampoline.
Laurent K. performed 134 keepie uppie knee touches using a tennis ball.
Suresh Gaur completed 45 alternate lunges in one minute.
Laurent K. performed 791 keepie uppie knee touches using a size 3 soccer ball.
Laurent K. performed 138 keepie uppie knee touches in one minute.
Petr J. performed 12 back flip-knee-front flip somersault tricks on a trampoline.
Petr J. performed 34 "back flip to knees" somersaults on a trampoline.
William C. completed 16 alternate lunges in one minute while holding two 22.5-kilogram dumbbells.
Alicia Weber performed 151 arms crossed bent knee sit-ups in three minutes.
Suresh G. balanced on an exercise ball using his knee and hand for one minute, 19.02 seconds.
Suresh G. knelt for one minute, 3.01 seconds while holding both of his heels.
Saar K. balanced a tennis racquet vertically on his knee for 2.65.
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