Agree with Omar

. Something you can also do is exercises on the ground, Yvonne. Belly lifts, ( see Gillian Higgins books and DVD) and also if you stand behind, as long as he is not a kicker!- and just lightly press your fingerail, index and next finger, about 10 inches down from the root of the tail, and about 4-5" out from the tail on either side. This activates a reflex that really makes them sit and lift the back, engaging the abs. You may need to experiment slightly to find the right spot, but do some belly lifts and the other exercise daily and this also helps.