


THE PHYSICAL INACTIVITY EPIDEMIC:JUST THE FACTSInactivity, Obesity, and Diabetes Dr. Mark Tremblay, Ph.D., FACSM College of Kinesiology, University of Saskatchewan
Recent Research • 2/3 of Canadian children are not sufficiently active for optimal growth and development (CFLRI, 1998) • Canadian children are becoming progressively fatter, weaker, and less flexible (CFLRI, 1998) • average Canadian child is sedentary for 3-5 hrs/day in front of TV alone (CMAJ, 1998) • in the past 15 years, the prevalence of obesity has tripled in Canadian children aged 7-13 (Tremblay and Willms, 2000)
Trends in the Health of Canadian Youth. Ottawa: Ministry of Public Works and Government Services. Health Canada, 2000. • Proportion of students in grades 6, 8, and 10 who exercise >1x/wk outside of school is declining (1990-1998) • Proportion of students in grades 6, 8, and 10 who watch TV >4 hrs/day is increasing • Proportion of students in grades 6, 8, and 10 who play video games >4 hrs/wk is increasing (mostly males) • Time spent playing video games by Canadian children among highest in the world (HBSC)
“obesity is an unintentional consequence of societal progress”“it results from a mismatch between our physiology and environment” Dr. James Hill, ACSM 2000
PROVINCIAL VARIATION IN BMI BMI UNITS
NIDDM • Secular increases in prevalence of NIDDM in adolescents (Pinhas-Hamiel et al. J. Pediatrics, 1996; Scott et al. Pediatrics, 1997)
4% 4-6% 6% n/a Diabetes and Gestational Diabetes Trends Among Adults in the U.S., BRFSS 1990 Source: Mokdad et al., Diabetes Care 2000;23:1278-83
4% 4-6% 6% n/a Diabetes and Gestational Diabetes Trends Among Adults in the U.S., BRFSS 1991-92 Source: Mokdad et al., Diabetes Care 2000;23:1278-83
4% 4-6% 6% n/a Diabetes and Gestational Diabetes Trends Among Adults in the U.S., BRFSS 1993-94 Source: Mokdad et al., Diabetes Care 2000;23:1278-83
4% 4-6% 6% n/a Diabetes and Gestational Diabetes Trends Among Adults in the U.S., BRFSS 1995 Source: Mokdad et al., Diabetes Care 2000;23:1278-83
4% 4-6% 6% n/a Diabetes and Gestational Diabetes Trends Among Adults in the U.S., BRFSS 1997-98 Source: Mokdad et al., Diabetes Care 2000;23:1278-83
4% 4-6% 6% n/a Diabetes and Gestational Diabetes Trends Among Adults in the U.S., BRFSS 1999 Source: Mokdad et al., Diabetes Care 2001;24:2
NIDDM • Second generation consequences: offspring of parents with NIDDM show multiple abnormalities in glucose homeostasis early in life as well as high risk measures of body fatness Srinivasan et al. Metabolism 47:998-1004, 1998.
“At our student-parent advisory committee last night, despite the money that we raise for one, we can no longer have a phys ed specialist, because other schools can’t afford one as well.”
“What ever happened to pick-up games and parents playing baseball with their kids?”