Just to provide a visual example of what I've encountered in Judo and BJJ as well Leo (a smaller women taking down a much bigger man), this is a clip from the MA documentary series called Samurai Spirit. In this episode, the host (Nicholas Pettas, who is 6 ft tall and 220 lbs) spars with a top Japanese female Judo player. He gets taken down twice without too much effort. Although friendly in it's nature, clearly Nicholas is trying as he is sweating and is actively trying to trip his opponent. Match starts at around 6:40
"Let your food be your medicine, and your medicine be your food"