yo man, i've rock-hard abs, it doing sit-ups since elementary school and now i have rock hard abs - yay. ya sit - ups do help. i dont know why but it worked for me.

( l )
( l )
( lol )

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age: 13
height: 5"2 / 157cm (dream height 175cm)
weight: 80 pounds/ 35kg
standing vert: 24 inches (never trained before)
running vert: 25 inches (same thing above)

aim:
1.standing and running vert 30+ inches
2.get the vjb
3.become a centre in my school team cos the tallest centre we have is only 170cm ... dots