Rapping is very good for health because you exercise the body  while doing so and the messages are sometimes very deep
What exercises do you do while rapping, that may enhance vocal delivery or rhythmic speech?
I can't tell for sure but I know,  it involves breath control and the movement of the windpipe and this can be good for health
What other stylistic elements do you do while rapping?
Sometimes you have to dance to the rhythm of what you are rapping to. So you move your body and your hands accordingly 
Any songs you like to sample or use bass lines from while you rap?
I consider Tupac as the greatest rapper of all time. His songs are deep and never go out of style
Tupac Shakur
Tupac Amaru Shakur ( ; born Lesane Parish Crooks, June 16, 1971September 13, 1996), also known by his stage names 2Pac and Makaveli, was an American rapper and actor. He is considered by many to be one of the greatest rappers of all time. Much of Shakur's work has been noted for addressing contemporary social issues that plagued inner cities, and he is considered a symbol of resistance and activism against inequality.
Shakur was born in the Harlem neighborhood of New York City but relocated
) Clemons downplayed this milestone achievement, saying, "To tell you the truth, I don't know what it means to ne the first Black coach in the (Grey) Cup and to win it. I know that I can't do anything by myself, and on my own strength I'm very little good. Anything I accomplish has to be with the aid of individuals, and this team became like a family and "is" a family, it had very little to do with the colour of my skin