Im just talking out loud here so take what I say with a grain of salt but when I've worked with a sled (pushing) it gives me the same response as when I've done yoga movements like planks and upward dogs. Do a tabata of those and you'll be shakin' like a dog chitin' peach seeds.
Or throw a couple bumpers on a towel on bball court and push that. Maybe thrusters or KB swings. If you can't figure it out do something else, have fun, your workout wont be wasted because you didnt push the sled. Just work and you'll be good.