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Open AccessArticle

Oxygen Uptake On-Kinetics during Low-Intensity Resistance Exercise: Effect of Exercise Mode and Load

1
Research Centre in Sports Sciences, Health Sciences and Human Development, CIDESD, 5000-103 Vila Real, Portugal
2
Brazilian Army Research Institute of Physical Fitness, Rio de Janeiro 22291-090, Brazil
3
Department of Sciences of Physical Education & Sports, University Institute of Maia, ISMAI, 4475-690 Maia, Portugal
4
Department of Physical Education & Sports, State University at Montes Claros, Minas Gerais 39401-089, Brazil
5
eCampus University, 22060 Novedrate, Italy
6
Department of Physical Education & Sports Science, Nanyang Technologic University, Singapore 637616, Singapore
*
Author to whom correspondence should be addressed.
Int. J. Environ. Res. Public Health 2019, 16(14), 2524; https://doi.org/10.3390/ijerph16142524
Received: 11 June 2019 / Revised: 6 July 2019 / Accepted: 9 July 2019 / Published: 15 July 2019
(This article belongs to the Special Issue Effects of Exercise on Health-related Markers and Bioenergetics)
Oxygen uptake (VO2) kinetics has been analyzed through mathematical modeling of constant work-rate exercise, however, the exponential nature of the VO2 response in resistance exercise is currently unknown. The present work assessed the VO2 on-kinetics during two different sub maximal intensities in the inclined bench press and in the seated leg extension exercise. Twelve males (age: 27.2 ± 4.3 years, height: 177 ± 5 cm, body mass: 79.0 ± 10.6 kg and estimated body fat: 11.4 ± 4.1%) involved in recreational resistance exercise randomly performed 4-min transitions from rest to 12% and 24% of 1 repetition maximum each, of inclined bench press (45°) and leg extension exercises. During all testing, expired gases were collected breath-by-breath with a portable gas analyzer (K4b2, Cosmed, Italy) and VO2 on-kinetics were identified using a multi-exponential mathematical model. Leg extension exercise exhibited a higher R-square, compared with inclined bench press, but no differences were found in-between exercises for the VO2 kinetics parameters. VO2 on-kinetics seems to be more sensitive to muscle related parameters (upper vs. lower body exercise) and less to small load variations in the resistance exercise. The absence of a true slow component indicates that is possible to calculate low-intensity resistance exercise energy cost based solely on VO2 measurements. View Full-Text
Keywords: VO2 kinetics; resistance exercise; energy cost VO2 kinetics; resistance exercise; energy cost
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MDPI and ACS Style

Reis, V.M.; Neves, E.B.; Garrido, N.; Sousa, A.; Carneiro, A.L.; Baldari, C.; Barbosa, T. Oxygen Uptake On-Kinetics during Low-Intensity Resistance Exercise: Effect of Exercise Mode and Load. Int. J. Environ. Res. Public Health 2019, 16, 2524.

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