Skipping, bounding, hopping , crawling and any type of animal movements (crab, crocodile, frog, rabbit, monkey, bear, etc.) for time, distance, and speed are great for combat. Sprinting and kettbell ballistics. Road work with regular strength outbursts, such as running laps around a park and doing pullups and pushup or dips at the playground each lap 0.5-1 mile lap or stopping every 5 minutes on an hour run to do a few one arm pushups and pistol squats.
I also like bear crawling as fast as I can then transitioning from being down on all fours to a running sprint. I prefer doing this on the beach rather than on grass (bee stings, dog poo, trash, sharp objects, etc.). I do 10 seconds of each or 10 seconds of bear crawls and 20 seconds of sprinting. If I am at the beach I run for three miles, turn around and bear crawl sprint 6-12 times (walking for recovery), then jog the rest of the way back to my starting point. Now that I live in Phoenix, AZ I do it on soccer or rugby pitches and football fields so I can judge more easily how far I have traveled and hopefully the grass is better maintained than some random open space at a park, but that's fine, too.