Horse and wagon
Exercise for the leg muscle on the “horse”. Can be done in 2 variations, which strengthens different muscles.
The “wagon” holds on to the “horse” lower arms. The “wagon” is squatting on a piece of cloth or something similar to reduce the friction, and lets the “horse” pull for a fixed length. Afterwards the “horse” and “wagon” changes places.
The horse pulls with the back to the wagon (i.e. runs forward)
The horse pulls with the front to the wagon (i.e. runs backward).