A New Device to Estimate V˙O2 during Incline Walking by Accelerometry and Barometry

Yamazaki, Toshiaki; Genno, Hirokazu; Kamijo, Yoshi‐ichiro; Okazaki, Kazunobu; Masuki, Shizue; Nosé, Hiroshi

doi:10.1249/mss.0b013e3181a9c452

Cited by 60 publications

(61 citation statements)

References 19 publications

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“…All individuals received a training device (JD Mate; Kissei Comtec, Matsumoto, Japan) [25] which was used to monitor daily physical activity (steps) throughout the study.…”

Section: Interventionsmentioning

confidence: 99%

Mechanisms behind the superior effects of interval vs continuous training on glycaemic control in individuals with type 2 diabetes: a randomised controlled trial

et al. 2014

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Aims/hypothesis By use of a parallel and partly crossover randomised, controlled trial design we sought to elucidate the underlying mechanisms behind the advantageous effects of interval walking training (IWT) compared with continuous walking training (CWT) on glycaemic control in individuals with type 2 diabetes. We hypothesised that IWT, more than CWT, would improve insulin sensitivity including skeletal muscle insulin signalling, insulin secretion and disposition index (DI).Methods By simple randomisation (sequentially numbered, opaque sealed envelopes), eligible individuals (diagnosed with type 2 diabetes, no exogenous insulin treatment) were allocated to three groups: a control group (CON, n=8), an IWT group (n=12) and an energy expenditure-matched CWT group (n=12). Training groups were prescribed free-living training, five sessions per week (60 min/session). A threestage hyperglycaemic clamp, including glucose isotope tracers and skeletal muscle biopsies, was performed before and after a 4 month intervention in a hospitalised setting. No blinding was performed. Results The improved glycaemic control, which was only seen in the IWT group, was consistent with IWT-induced increases in insulin sensitivity index (49.8 ± 14.6%; p<0.001), peripheral glucose disposal (14.5±4.9%; p<0.05) and DI (66.2±21.8%; p<0.001), with no changes in the CWT or CON group. Moreover, only IWT improved insulin signalling in skeletal muscle via increased insulin-stimulated phosphorylation of AS160 (29.0±10.8%; p<0.05). No changes were seen in insulin secretion during hyperglycaemia alone, hyperglycaemia + glucagon-like peptide 1 infusion or arginine injection. Conclusions/interpretation IWT maintains insulin secretion and improves insulin sensitivity and DI, in contrast to energy expenditure-matched CWT. These results suggest that training with alternating intensity, and not just training volume and mean intensity, is a key determinant of changes in whole body glucose disposal in individuals with type 2 diabetes. Trial registration: ClinicalTrials (NCT01234155).

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“…All individuals received a training device (JD Mate; Kissei Comtec, Matsumoto, Japan) [25] which was used to monitor daily physical activity (steps) throughout the study.…”

Section: Interventionsmentioning

confidence: 99%

Mechanisms behind the superior effects of interval vs continuous training on glycaemic control in individuals with type 2 diabetes: a randomised controlled trial

et al. 2014

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“…The physiological parameters include heart rate 38) , skin temperature 39) , and galvanic response 39) . The environmental information could be barometric pressure 40) , geographical information system 41) , and wearable camera 42) . Another challenge in this field is the comparability of sedentary outputs from different wearable devices 33) .…”

Section: Studymentioning

confidence: 99%

Assessing sedentary behavior using wearable devices: An overview and future directions

Sasai

2017

JPFSM

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“…We have developed a new portable calorie meter with which energy expenditure can be precisely measured even when they walk on inclines [10]. First, we measured VO 2 by respiratory gas analysis and vector magnitude (VM, G) from triaxial accelerations in middle-aged and older males and females aged ∼63 years old during graded walking on a treadmill while the incline was varied from −15% to +15%.…”

Section: Three Dimensional Accelerometrymentioning

confidence: 99%

Interval Walking Training for Middle-Aged and Older People: Methods and Evidence

Nosé

2014

IEICE Trans. Commun.

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SUMMARYFaced with social problems such as rapidly aging society, the solutions have been expected in sports medicine. Humans became widely distributed on the earth from their birth by acquiring abilities to walk in an upright position and to adapt themselves to various natural environments. However, seeking a 'comfortable environment' in modern civilization has deteriorated these genetic characteristics of humans, and the consumption of resources and energy to acquire such a 'comfortable environment' has induced global warming-associated natural disasters and the destruction of social order. To halt this vicious cycle, we may reactivate the genetic characteristics in humans by doing exercise. To do this, we have developed a health promotion program for middle aged and older people, Jukunen Taiikudaigaku Program, in cooperation with the Japanese government, developed high-intensity interval walking training (IWT), and examined the physical and mental effects on 5,400 people for these 10 years. We found that IWT for 4 months increased physical fitness by 10-20%, decreased the indices of life-style related diseases by 10-20%. Since a prescription of IWT can be conducted by using an IT network system called e-Health Promotion System, the participants in the program were able to receive the prescription even if they lived remote from trainers, enabling them to perform IWT at their favored places and times, and also at low cost. Moreover, we found some single nucleotide polymorphisms closely related to inter-individual differences in the responses to IWT. Further, the system enables us to assess the inactivation/activation of genes for inflammatory responses which has been suggested to be involved in life-style related diseases. Also, the system enables us to search foods to promote health when they are consumed during exercise training. Thus, the system would have strong potential to promote health of middle-aged and older people in advanced aging society.

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A New Device to Estimate V˙O2 during Incline Walking by Accelerometry and Barometry

Abstract: VO2 during walking on various inclines can be precisely estimated by using the device equipped with a triaxial accelerometer and a barometer.

Cited by 60 publications

References 19 publications

Mechanisms behind the superior effects of interval vs continuous training on glycaemic control in individuals with type 2 diabetes: a randomised controlled trial

Mechanisms behind the superior effects of interval vs continuous training on glycaemic control in individuals with type 2 diabetes: a randomised controlled trial

Assessing sedentary behavior using wearable devices: An overview and future directions

Interval Walking Training for Middle-Aged and Older People: Methods and Evidence

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