E - Exercising indoors feels just right. (Subject Complement)

R - Remember lifting with all your might? (Direct Object)

U - Using good form keeps your goals in sight. (Indirect Object)

N - Nina caught skipping which sparked a fight! (Object Complement)

D - During stretching, we laughed all night. (Object of a Preposition)

E -

R -

U -

N -

D -