Pediatric Neurology published research on  a study comparing 40 children under six years old with cerebral palsy and the intensity of rehabilitation services.  One group underwent one year of rehab services 2 times per week.  The other group, received one month of twice daily, rehab services followed by 2x/week services for five months and then the cycle was repeated to complete the year.  Results indicated a 37% improvement in gross motor function overall.  The group that received the intensive services showed the largest improvements in gross motor function.  The authors recommend increasing services at younger ages.

Reference:  Chiara Gagliardi MD, Cristina Maghini MD, Chiara Germiniasi MD, Giuseppe Stefanoni PT, Francesca Molteni PT, D. Michael Burt PhD and Anna C. Turconi MD.  The Effect of Frequency of Cerebral Palsy Treatment: A Matched-Pair Pilot Study Pediatric Neurology Volume 39, Issue 5, November 2008, Pages 335-340