1) Burdened 2) Encumbered 3) Got ready to ride 4) Like a racehorse, at times 5) Like polo ponies 6) Ready for mounting 7) Ready to be ridden 8) Subject to an imposed burden 1) Burdened 2) Laden 3) Taxed 
• (a.) Having a broad patch of color across the back, like a saddle; saddle-backed. • (imp. & p. p.) of Saddle
Sad'dled adjective (Zoology) Having a broad patch of color across the back, like a saddle; saddle-backed. 
[adj] - subject to an imposed burden 2. [adj] - having a saddle on or being mounted on a saddled animal
adjective having a saddle on or being mounted on a saddled animal; `saddled and spurred and ready to ride`