One of the videos Larry showed was a classic Apollo era fall in the AL7B. The astronaut keep trying to get up. But his CG was to high and forced him back down. Larry also showed an ALSEP(?) deployment. Two big boxes (barbell like on a pole) being lugged around forcing the astronaut's CG low and making his walk sure footed and less energy intensive.

Research has been done on the "right" weight for a Mars Suit and it generally is less than 100 pounds with a much lower CG than Apollo era suits. But non of that matters as much as the thermo and durability issues. Apollo suits were falling apart after the few days of those mission.

Not interested in talking about the Mars Suit program itself?