Benjamín CaballeroCenter for Human Nutrition

Johns Hopkins University

AUMENTAR EL GASTO

ENERGÉTICO:

ACTIVIDAD FÍSICA

El método factorial

BMR(measured)

Physical Activity(“allowance”)

TEE

(derived)

Based on estimated energy cost of

voluntary activities

The Doubly-labeled Water Method

BMR(MEASURED)

TEE

(MEASURED)

Physical Activity(calculated)

EPOC+

NEAT

Components of PA EE

EPOC:

Excess Post-exercise Oxygen Consumption

NEAT:

Non-Exercise Activity Thermogenesis

Components of Physical Activity EE

O2 Accel PAQ SOFIT

EPOC X -- -- --

NEAT X -/+ -- +/-

Voluntary PA X X X X

Measurement of physical activity

• PAL : TEE / BEE

• MET: O2

consumption of 3.5 mL/kg/min(= 0.0175 kcal/kg/min)

• PAL equivalents of METs: 0.0175 x 1.15 / 0.9

Niveles de actividad física (DRI 2003)

Promedio

Nivel Intervalo M H

Sedentario 1.0 - 1.39 1.23 1.29

Poco activo 1.4 - 1.59 1.52 1.51

Activo 1.6 - 1.89 1.74 1.74

Muy activo 1.9 - 2.5 2.09 2.06

School-based Physical Activity ProgramsSchool-based Physical Activity Programs

• Physical Education

• Exercise Breaks

• Games / Role playing

• Active Recess

Physical EducationPhysical Education

Goals:

• Daily• 30 minutes• 50% MVPA

•3-month curriculum

•Staff training

•Equipment

•Mentor support

Exercise BreaksExercise Breaks

• Classroom physical activity

• Goals:

• Daily• 5-15 minutes

Active RecessActive Recess

Goals:

• Daily

• 15-30 minutes

•Increase amount of

time spent in MVPA

•Encourage free play

GamesGames

•Based on traditional stories, current characters, etc.

•Culturally appropriate

•Consider safety, educational value

•Can be distributed in sessions throughout the day

Implementation of the PA program at schools

• Minimal goal (3 PE lessons/wk) : 93.9%

• Maximal goal (5 PE lessons/wk): 56.5%

• Average duration of class = 32.8 minutes

PA patterns, 9am – 7pm, in intervention and

control groups

At-school and 24-hr PA levels