Novel Protocol Calculates Energy Needs, Physical Activity Ratio
(HealthDay News) — The PAR protocol has been validated as a new method for calculating the estimated energy requirements (EERs) and daily average physical activity ratio (APAR) at the population level, according to research published in the December issue of the Mayo Clinic Proceedings.
Edward Archer, PhD, of the University of South Carolina in Columbia, and colleagues used a factorial equation to calculate estimates of EER and APAR values for 2,597 adults, aged 20–74 years. The EER values derived from the PAR protocol were validated by comparison with values from the Institute of Medicine (IOM) equations.
The researchers found high correlation between the PAR-derived and IOM-derived EERs. For 2005–2006, the EERs for U.S. adults were 2,940 kcal per day for men and 2,275 kcal per day for women. APAR was inversely related to both obesity and age. APAR values were 1.53 and 1.52 for normal-weight men and women, respectively. Obese men and women had lower APAR values than normal-weight individuals (P=0.23 and P=0.15, respectively). Younger individuals had higher APAR values than older individuals (P<0.001).
"The PAR protocol is an accurate method for deriving nationally representative estimates of EER and APAR values," the authors write. "These descriptive data provide novel quantitative baseline values for future investigations into associations of physical activity and health."
The Coca-Cola Company funded the study via an unrestricted research grant.