I've been riding my dildo anally by either getting down on my knees and riding it on the floor, sticking it to the wall and pounding against it, or sticking it to the bottom of the wall, getting down on all fours and fucking it doggy, but I get tired easily. It doesn't take long before my arms or legs get tired, I can't seem to maintain a good speed for very long before I have to change position or slow down. It's impossible sometimes to reach my desired speed, I just can't seem to use enough energy.

I'm very scrawny and don't have a lot of muscle, so maybe that explains why I don't seem to have enough strength to maintain my speed or go even faster. I can sometimes rely on the bounce of my butt hitting the wall to carry me forward a bit when riding my dildo against the wall but even then my hips start to get a little stiff after a while and my arms get tired from supporting me.

Are there any positions or methods for riding a dildo anally that help conserve energy? I always feel exhausted half way through.