It seems like many grapplers are always desperate to train, so why not just take it outdoors?
In this video, we see a BJJ blue belt grappling a Wrestler in the park.
Wrestlers are universally known as being some of the most hardcore athletes on earth. It takes a huge amount of hard work and perseverance to be successful in wrestling. The difference, between wrestling and BJJ, is that wrestlers work hard to take their opponents down and maintain a top position. This is why explosive power is considered to be an asset in wrestling, much more than in BJJ.
Another similar challenge but this time between a BJJ black belt and a Wrestler: