Body acceleration distribution and O2 uptake in humans during running and jumping

Abstract

Body acceleration distribution and its relation to the mode of generation were determined in eight young males (19-26 yr) who walked and ran on a treadmill operated at four speeds and jumped on a trampoline at four heights. With increasing treadmill speed, peak acceleration at the ankle (Aa = 3.0-12.0 Gz) always exceeded that at the back and forehead (Ab = 0.9-5.0 Gz, and Ah = 0.8-3.9 Gz); these acceleration profiles included higher frequency components than those during jumping. Corresponding ranges of oxygen uptake (VO2) and heart rate (HR) were 0.8-3.0 l/min and 90-180 beats/min, respectively. With increasing jumping height, acceleration levels were more symmetrically distributed (Aa = 3.0-7.0 Gz, Ab = 3.9-6.0 Gz, and Ah = 3.0-5.6 Gz); VO2 and HR ranges were 1.1-2.5 l/min and 102-175 beats/min, respectively. VO2 was linearly related to HR for both types of exercise. The results indicate that, for similar levels of HR and VO2, the magnitude of the biomechanical stimuli is greater with jumping on a trampoline than with running, a finding that might help identify acceleration parameters needed for the design of remedial procedures to avert deconditioning in persons exposed to weightlessness.

A triaxial accelerometer and portable data processing unit for the assessment of daily physical activity

“…Higher frequencies are caused by the impact between foot and walking surface and do not directly result from voluntary muscular work. By using piezoresistive accelerometers (range: 20 g, frequency response: 0-70 Hz), taped to the skin, Bhattacharya et al [28] found the majority of frequency components during running to vary between 1-18 Hz in vertical direction at the ankle. At the low back and the head, the frequency content of acceleration profiles was smaller.…”

Discrete techniques applied to low-energy mobile human activity recognition. A new approach

“…However, the human-activity frequency range is much lower than the sampling band chosen. By using accelerometers taped to the body while running, Bhattacharya, McCutcheon, Shvartz, and Greenleaf (1980) found the main frequency components between 1-18 Hz at the ankle. As will be seen later, our work proposes placing the device at the hip, where acceleration forces are lower than at the ankle, and hence frequencies at this position are also lower.…”

Valoración de la capacidad funcional en el ámbito domiciliario y en la clínica: Nuevas posibilidades de aplicación de la acelerometría para la valoración de la marcha, equilibrio y potencia muscular en personas mayores

“…La aceleración aumenta en magnitud de la cabeza a los tobillos. Correr produce las aceleraciones mayores en la dirección vertical de 8,1 -12 g en el tobillo [35][36][37][38][39][40][41][42][43][44] , hasta 5,0g en la parte lumbar [35][36][37][38][39][40][41][42][43][44] y hasta 4,0 en la cabeza 44 . Las aceleraciones del tronco en el eje vertical que se han obtenido durante la marcha abarcan el rango -0,3 a 0,8 g, mientras que en dirección horizontal medido en la zona lumbar el rango va de -0,3 a 0,4 g y de -0,2 a 0,2 en la cabeza 45 .…”

“…Es la tarea que requiere el mayor esfuerzo mecánico dentro de las actividades cotidianas 44,59 y es un prerrequisito para poder caminar 60 . La capacidad de sentarse de forma controlada posee igual importancia.…”